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Mohamadzadeh Shirazi H, Ghanbari A, Vermeire F, Reyniers MF, Van Geem KM. Carburization of High-Temperature Alloys during Steam Cracking: The Impact of Alloy Composition and Temperature. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
| | - Arezoo Ghanbari
- Laboratory for Chemical Technology, Ghent University, Technologiepark 121, B-9052Gent, Belgium
| | - Florence Vermeire
- Laboratory for Chemical Technology, Ghent University, Technologiepark 121, B-9052Gent, Belgium
| | | | - Kevin M. Van Geem
- Laboratory for Chemical Technology, Ghent University, Technologiepark 121, B-9052Gent, Belgium
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2
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Veeraraghavan Srinath N, Poelman H, Buelens L, Dendooven J, Reyniers MF, Marin GB, Galvita VV. Behaviour of Platinum-Tin during CO2-assisted propane dehydrogenation: Insights from quick X-ray absorption spectroscopy. J Catal 2022. [DOI: 10.1016/j.jcat.2021.08.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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3
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De Keer L, Van Steenberge P, Reyniers MF, Gryn'ova G, Aitken HM, Coote ML. New mechanism for autoxidation of polyolefins: kinetic Monte Carlo modelling of the role of short-chain branches, molecular oxygen and unsaturated moieties. Polym Chem 2022. [DOI: 10.1039/d1py01659h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Using quantum-chemical calculations and kinetic modelling, we reveal the dominant reaction pathway in polymer autoxidation, (i) whether oxygen promotes or hamper degradation and (ii) how defects in the polymer backbone affect degradation.
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Affiliation(s)
- Lies De Keer
- Department of Materials, Textiles and Chemical Engineering, Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Zwijnaarde, Belgium
| | - Paul Van Steenberge
- Department of Materials, Textiles and Chemical Engineering, Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Zwijnaarde, Belgium
| | - Marie-Françoise Reyniers
- Department of Materials, Textiles and Chemical Engineering, Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Zwijnaarde, Belgium
| | - Ganna Gryn'ova
- ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory, 2601, Australia
- Heidelberg Institute for Theoretical Studies (HITS gGmbH), and Interdisciplinary Center for Scientific Computing (IWR), Heidelberg University, Heidelberg, Germany
| | - Heather M. Aitken
- ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Michelle L. Coote
- ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory, 2601, Australia
- Heidelberg Institute for Theoretical Studies (HITS gGmbH), and Interdisciplinary Center for Scientific Computing (IWR), Heidelberg University, Heidelberg, Germany
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4
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De Keer L, Cavalli F, Estupiñán D, Krüger AJD, Rocha S, Van Steenberge PHM, Reyniers MF, De Laporte L, Hofkens J, Barner L, D’hooge DR. Synergy of Advanced Experimental and Modeling Tools to Underpin the Synthesis of Static Step-Growth-Based Networks Involving Polymeric Precursor Building Blocks. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01476] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Lies De Keer
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Gent, Belgium
- School of Chemistry and Physics, and Centre for Materials Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Federica Cavalli
- Soft Matter Synthesis Laboratory, Institut für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344 Karlsruhe, Germany
| | - Diego Estupiñán
- Soft Matter Synthesis Laboratory, Institut für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344 Karlsruhe, Germany
| | - Andreas J. D. Krüger
- DWI-Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074 Aachen, Germany
- Institute of Technical and Macromolecular Chemistry (ITMC), Polymeric Biomaterials, RWTH Aachen University, Worringerweg 2, 52072 Aachen, Germany
- Department of Advanced Materials for Biomedicine, Institute of Applied Medical Engineering (AME), University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Susana Rocha
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | | | | | - Laura De Laporte
- DWI-Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074 Aachen, Germany
- Institute of Technical and Macromolecular Chemistry (ITMC), Polymeric Biomaterials, RWTH Aachen University, Worringerweg 2, 52072 Aachen, Germany
- Department of Advanced Materials for Biomedicine, Institute of Applied Medical Engineering (AME), University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Johan Hofkens
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Leonie Barner
- School of Chemistry and Physics, and Centre for Materials Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Dagmar R. D’hooge
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Gent, Belgium
- Centre for Textile Science and Engineering, Ghent University, Technologiepark 70a, 9052 Gent, Belgium
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5
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De Keer L, Kilic KI, Van Steenberge PHM, Daelemans L, Kodura D, Frisch H, De Clerck K, Reyniers MF, Barner-Kowollik C, Dauskardt RH, D'hooge DR. Computational prediction of the molecular configuration of three-dimensional network polymers. Nat Mater 2021; 20:1422-1430. [PMID: 34183809 DOI: 10.1038/s41563-021-01040-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 05/19/2021] [Indexed: 06/13/2023]
Abstract
The three-dimensional arrangement of natural and synthetic network materials determines their application range. Control over the real-time incorporation of each building block and functional group is desired to regulate the macroscopic properties of the material from the molecular level onwards. Here we report an approach combining kinetic Monte Carlo and molecular dynamics simulations that chemically and physically predicts the interactions between building blocks in time and in space for the entire formation process of three-dimensional networks. This framework takes into account variations in inter- and intramolecular chemical reactivity, diffusivity, segmental compositions, branch/network point locations and defects. From the kinetic and three-dimensional structural information gathered, we construct structure-property relationships based on molecular descriptors such as pore size or dangling chain distribution and differentiate ideal from non-ideal structural elements. We validate such relationships by synthesizing organosilica, epoxy-amine and Diels-Alder networks with tailored properties and functions, further demonstrating the broad applicability of the platform.
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Affiliation(s)
- Lies De Keer
- Laboratory for Chemical Technology (LCT), Ghent University, Ghent, Belgium
| | - Karsu I Kilic
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | | | - Lode Daelemans
- Centre for Textile Science and Engineering (CTSE), Ghent University, Ghent, Belgium
| | - Daniel Kodura
- Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Hendrik Frisch
- Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Karen De Clerck
- Centre for Textile Science and Engineering (CTSE), Ghent University, Ghent, Belgium
| | | | - Christopher Barner-Kowollik
- Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
| | - Reinhold H Dauskardt
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
| | - Dagmar R D'hooge
- Laboratory for Chemical Technology (LCT), Ghent University, Ghent, Belgium.
- Centre for Textile Science and Engineering (CTSE), Ghent University, Ghent, Belgium.
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6
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Srinath NV, Longo A, Poelman H, Ramachandran RK, Feng JY, Dendooven J, Reyniers MF, Galvita VV. In Situ XAS/SAXS Study of Al 2O 3-Coated PtGa Catalysts for Propane Dehydrogenation. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03146] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Alessandro Longo
- Istituto per lo Studio dei Materiali Nanostrutturati (ISMN), CNR, UOS Palermo, Via Ugo La Malfa, 153, 90146 Palermo, Italy
| | - Hilde Poelman
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - Ranjith K. Ramachandran
- Department of Solid State Sciences, CoCooN Group, Ghent University, Krijgslaan 281/S1, B-9000 Ghent, Belgium
| | - Ji-Yu Feng
- Department of Solid State Sciences, CoCooN Group, Ghent University, Krijgslaan 281/S1, B-9000 Ghent, Belgium
| | - Jolien Dendooven
- Department of Solid State Sciences, CoCooN Group, Ghent University, Krijgslaan 281/S1, B-9000 Ghent, Belgium
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - Vladimir. V. Galvita
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
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7
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De Keer L, Van Steenberge PHM, Reyniers MF, D’hooge DR. Going Beyond the Carothers, Flory and Stockmayer Equation by Including Cyclization Reactions and Mobility Constraints. Polymers (Basel) 2021; 13:polym13152410. [PMID: 34372013 PMCID: PMC8348631 DOI: 10.3390/polym13152410] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/13/2021] [Accepted: 07/17/2021] [Indexed: 12/03/2022] Open
Abstract
A challenge in the field of polymer network synthesis by a step-growth mechanism is the quantification of the relative importance of inter- vs. intramolecular reactions. Here we use a matrix-based kinetic Monte Carlo (kMC) framework to demonstrate that the variation of the chain length distribution and its averages (e.g., number average chain length xn), are largely affected by intramolecular reactions, as mostly ignored in theoretical studies. We showcase that a conventional approach based on equations derived by Carothers, Flory and Stockmayer, assuming constant reactivities and ignoring intramolecular reactions, is very approximate, and the use of asymptotic limits is biased. Intramolecular reactions stretch the functional group (FG) conversion range and reduce the average chain lengths. In the likely case of restricted mobilities due to diffusional limitations because of a viscosity increase during polymerization, a complex xn profile with possible plateau formation may arise. The joint consideration of stoichiometric and non-stoichiometric conditions allows the validation of hypotheses for both the intrinsic and apparent reactivities of inter- and intramolecular reactions. The kMC framework is also utilized for reverse engineering purposes, aiming at the identification of advanced (pseudo-)analytical equations, dimensionless numbers and mechanistic insights. We highlight that assuming average molecules by equally distributing A and B FGs is unsuited, and the number of AB intramolecular combinations is affected by the number of monomer units in the molecules, specifically at high FG conversions. In the absence of mobility constraints, dimensionless numbers can be considered to map the time variation of the fraction of intramolecular reactions, but still, a complex solution results, making a kMC approach overall most elegant.
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Affiliation(s)
- Lies De Keer
- Laboratory for Chemical Technology (LCT), Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering and Architecture, Ghent University, Technologiepark 125, 9052 Ghent, Belgium; (L.D.K.); (P.H.M.V.S.); (M.-F.R.)
| | - Paul H. M. Van Steenberge
- Laboratory for Chemical Technology (LCT), Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering and Architecture, Ghent University, Technologiepark 125, 9052 Ghent, Belgium; (L.D.K.); (P.H.M.V.S.); (M.-F.R.)
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology (LCT), Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering and Architecture, Ghent University, Technologiepark 125, 9052 Ghent, Belgium; (L.D.K.); (P.H.M.V.S.); (M.-F.R.)
| | - Dagmar R. D’hooge
- Laboratory for Chemical Technology (LCT), Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering and Architecture, Ghent University, Technologiepark 125, 9052 Ghent, Belgium; (L.D.K.); (P.H.M.V.S.); (M.-F.R.)
- Centre for Textiles Science and Engineering (CTSE), Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering and Architecture, Ghent University, Technologiepark 70a, 9052 Ghent, Belgium
- Correspondence:
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8
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de Reviere A, Gunst D, Sabbe MK, Reyniers MF, Verberckmoes A. Dehydration of butanol towards butenes over MFI, FAU and MOR: influence of zeolite topology. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02366c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of zeolite topology on the kinetics, selectivity and catalyst stability for the dehydration of butanol is studied experimentally and through microkinetic modeling.
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Affiliation(s)
- Arno de Reviere
- Industrial Catalysis and Adsorption Technology
- Ghent University
- 9000 Ghent
- Belgium
- Laboratory for Chemical Technology
| | - Dieter Gunst
- Industrial Catalysis and Adsorption Technology
- Ghent University
- 9000 Ghent
- Belgium
- Laboratory for Chemical Technology
| | - Maarten K. Sabbe
- Industrial Catalysis and Adsorption Technology
- Ghent University
- 9000 Ghent
- Belgium
- Laboratory for Chemical Technology
| | | | - An Verberckmoes
- Industrial Catalysis and Adsorption Technology
- Ghent University
- 9000 Ghent
- Belgium
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Geerts M, Symoens SH, Reyniers PA, Marin GB, Reyniers MF, Van Geem KM. Steam Cracking Coke Properties and Their Influence on Furnace Run Length Predictions: Experimental and Modeling Study. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c04727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Moreno Geerts
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Gent, Belgium
- BASF Antwerpen NV, Scheldelaan 600, 2040 Antwerpen, Belgium
| | - Steffen H. Symoens
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Gent, Belgium
| | | | - Guy B. Marin
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Gent, Belgium
| | | | - Kevin M. Van Geem
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Gent, Belgium
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10
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Patil M, Sarris SA, Verbeken K, Reyniers MF, Van Geem KM. Catalytic Effect of Dimethyl Disulfide on Coke Formation on High-Temperature Alloys: Myth or Reality? Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01693] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Manjunath Patil
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Gent, Belgium
| | - Stamatis A. Sarris
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Gent, Belgium
| | - Kim Verbeken
- Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark 46, 9052 Gent, Belgium
| | | | - Kevin M. Van Geem
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Gent, Belgium
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11
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A. Sarris S, H. Symoens S, Olahova N, Reyniers MF, B. Marin G, M. Van Geem K. Alumina-based Coating for Coke Reduction in Steam Crackers. Materials (Basel) 2020; 13:ma13092025. [PMID: 32357467 PMCID: PMC7254218 DOI: 10.3390/ma13092025] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/20/2020] [Accepted: 04/20/2020] [Indexed: 12/21/2022]
Abstract
Alumina-based coatings have been claimed as being an advantageous modification in industrial ethylene furnaces. In this work, on-line experimentally measured coking rates of a commercial coating (CoatAlloy™) have pointed out its superiority compared to an uncoated reference material in an electrobalance set-up. Additionally, the effects of presulfiding with 500 ppmw DMDS per H2O, continuous addition of 41 ppmw S per HC of DMDS, and a combination thereof were evaluated during ethane steam cracking under industrially relevant conditions (Tgasphase = 1173 K, Ptot = 0.1 MPa, XC2H6 = 70%, dilution δ = 0.33 kgH2O/kgHC). The examined samples were further evaluated using online thermogravimetry, scanning electron microscopy and energy diffractive X-ray for surface and cross-section analysis together with X-ray photoelectron spectroscopy and wavelength-dispersive X-ray spectroscopy for surface analysis. The passivating coating illustrated a better performance than the reference Ni-Cr Fe-base alloy after application of an improved pretreatment, followed by piddling changes on the product distribution. Presulfiding of the coating affected negatively the observed coking rates in comparison with the reference alloy, so alternative presulfiding and sulfur addition strategies are recommended when using this barrier coating.
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12
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Van Steenberge PHM, Sedlacek O, Hernández-Ortiz JC, Verbraeken B, Reyniers MF, Hoogenboom R, D'hooge DR. Visualization and design of the functional group distribution during statistical copolymerization. Nat Commun 2019; 10:3641. [PMID: 31409782 PMCID: PMC6692376 DOI: 10.1038/s41467-019-11368-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 07/11/2019] [Indexed: 11/09/2022] Open
Abstract
Even though functional copolymers with a low percentage of functional comonomer units (up to 20 mol%) are widely used, for instance for the development of polymer therapeutics and hydrogels, insights in the functional group distribution over the actual chains are lacking and the average composition is conventionally used to describe the functionalization degree. Here we report the visualization of the monomer distribution over the different polymer chains by a synergetic combination of experimental and theoretical analysis aiming at the construction of functionality-chain length distributions (FUNC-CLDs). A successful design of the chemical structure of the comonomer pair, the initial functional comonomer amount (13 mol%), and the temperature (100 °C) is performed to tune the FUNC-CLD of copoly(2-oxazoline)s toward high functionalization degree for both low (100) and high (400) target degrees of polymerization. The proposed research strategy is generic and extendable to a broad range of copolymerization chemistries, including reversible deactivation radical polymerization.
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Affiliation(s)
- Paul H M Van Steenberge
- Ghent University, Laboratory for Chemical Technology (LCT), Technologiepark 125, B-9052, Gent, Belgium
| | - Ondrej Sedlacek
- Ghent University, Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4, 9000, Gent, Belgium
| | - Julio C Hernández-Ortiz
- Ghent University, Laboratory for Chemical Technology (LCT), Technologiepark 125, B-9052, Gent, Belgium
| | - Bart Verbraeken
- Ghent University, Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4, 9000, Gent, Belgium
| | - Marie-Françoise Reyniers
- Ghent University, Laboratory for Chemical Technology (LCT), Technologiepark 125, B-9052, Gent, Belgium
| | - Richard Hoogenboom
- Ghent University, Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4, 9000, Gent, Belgium.
| | - Dagmar R D'hooge
- Ghent University, Laboratory for Chemical Technology (LCT), Technologiepark 125, B-9052, Gent, Belgium. .,Ghent University, Centre for Textile Science and Engineering, Technologiepark 70a, B-9052, Gent, Belgium.
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13
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Sarris SA, Verbeken K, Reyniers MF, Van Geem KM. Evaluation of a Ti-Base Alloy as Steam Cracking Reactor Material. Materials (Basel) 2019; 12:ma12162550. [PMID: 31405103 PMCID: PMC6719091 DOI: 10.3390/ma12162550] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 07/26/2019] [Accepted: 08/06/2019] [Indexed: 12/20/2022]
Abstract
Low-coking reactor material technologies are key for improving the performance and sustainability of steam crackers. In an attempt to appraise the coking performance of an alternative Ti-base alloy during ethane steam cracking, an experimental study was performed in a jet stirred reactor under industrially relevant conditions using thermogravimetry (Tgasphase = 1173 K, Ptot = 0.1 MPa, XC2H6 = 70%, and dilution δ = 0.33 kgH2O/kgHC). Initially, a typical pretreatment used for Fe-Ni-Cr alloys was utilized and compared with a pretreatment at increased temperature, aiming at better surface oxidation and thus suppressing coke formation. The results revealed a decrease in coking rates upon high temperature pretreatment of the Ti-base alloy, however, its coking performance was significantly worse compared to the typically used Fe-Ni-Cr alloys, and carbon oxides formation increased by a factor of 30 or more. Moreover, the analyzed coupons showed crack propagation after coking/decoking and cooling down to ambient temperature. Scanning electron microscopy combined with energy-dispersive X-ray spectroscopy indicated that the prompt and unsystematic oxidation of the surface and bulk caused observable crack initiation and propagation due to alloy brittleness. Hence, the tested Ti-base alloy cannot be considered an industrially noteworthy steam cracking reactor alloy.
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Affiliation(s)
- Stamatis A Sarris
- Department of Materials, Textiles and Chemical Engineering, University of Gent, Technologiepark 914, BE-9052 Zwijnaarde, Belgium
| | - Kim Verbeken
- Department of Materials, Textiles and Chemical Engineering, University of Gent, Technologiepark 914, BE-9052 Zwijnaarde, Belgium
| | - Marie-Françoise Reyniers
- Department of Materials, Textiles and Chemical Engineering, University of Gent, Technologiepark 914, BE-9052 Zwijnaarde, Belgium
| | - Kevin M Van Geem
- Department of Materials, Textiles and Chemical Engineering, University of Gent, Technologiepark 914, BE-9052 Zwijnaarde, Belgium.
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14
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De Vylder A, Lauwaert J, Sabbe MK, Reyniers MF, De Clercq J, Van Der Voort P, Thybaut JW. Rational design of nucleophilic amine sites via computational probing of steric and electronic effects. Catal Today 2019. [DOI: 10.1016/j.cattod.2019.01.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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De Rybel N, Van Steenberge PHM, Reyniers MF, D’hooge DR, Marin GB. Interplay of Head, Tail, and Mid-Chain Radicals in Bulk Free-Radical and Reversible Degenerative Addition Fragmentation Chain-Transfer Polymerizations of Vinyl Acetate. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00762] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nils De Rybel
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
- Centre for Textiles, Science and Engineering, Ghent University, Technologiepark 70A, B-9052 Ghent, Belgium
| | - Paul H. M. Van Steenberge
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - Dagmar R. D’hooge
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
- Centre for Textiles, Science and Engineering, Ghent University, Technologiepark 70A, B-9052 Ghent, Belgium
| | - Guy B. Marin
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
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16
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Devlaminck DJG, Van Steenberge PHM, Reyniers MF, D'hooge DR. Modeling of Miniemulsion Polymerization of Styrene with Macro-RAFT Agents to Theoretically Compare Slow Fragmentation, Ideal Exchange and Cross-Termination Cases. Polymers (Basel) 2019; 11:E320. [PMID: 30960304 PMCID: PMC6419184 DOI: 10.3390/polym11020320] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/05/2019] [Accepted: 02/08/2019] [Indexed: 11/17/2022] Open
Abstract
A 5-dimensional Smith-Ewart based model is developed to understand differences for reversible addition-fragmentation chain transfer (RAFT) miniemulsion polymerization with theoretical agents mimicking cases of slow fragmentation, cross-termination, and ideal exchange while accounting for chain length and monomer conversion dependencies due to diffusional limitations. The focus is on styrene as a monomer, a water soluble initiator, and a macro-RAFT agent to avoid exit/entry of the RAFT leaving group radical. It is shown that with a too low RAFT fragmentation rate coefficient it is generally not afforded to consider zero-one kinetics (for the related intermediate radical type) and that with significant RAFT cross-termination the dead polymer product is dominantly originating from the RAFT intermediate radical. To allow the identification of the nature of the RAFT retardation it is recommended to experimentally investigate in the future the impact of the average particle size (dp) on both the monomer conversion profile and the average polymer properties for a sufficiently broad dp range, ideally including the bulk limit. With decreasing particle size both a slow RAFT fragmentation and a fast RAFT cross-termination result in a stronger segregation and thus rate acceleration. The particle size dependency is different, allowing further differentiation based on the variation of the dispersity and end-group functionality. Significant RAFT cross-termination is specifically associated with a strong dispersity increase at higher average particle sizes. Only with an ideal exchange it is afforded in the modeling to avoid the explicit calculation of the RAFT intermediate concentration evolution.
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Affiliation(s)
- Dries J G Devlaminck
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 914, B-9052 Ghent, Belgium.
| | - Paul H M Van Steenberge
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 914, B-9052 Ghent, Belgium.
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 914, B-9052 Ghent, Belgium.
| | - Dagmar R D'hooge
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 914, B-9052 Ghent, Belgium.
- Centre for Textile Science and Engineering, Ghent University, Technologiepark 907, B-9052 Ghent, Belgium.
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17
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Vir AB, Marien YW, Van Steenberge PHM, Barner-Kowollik C, Reyniers MF, Marin GB, D'hooge DR. From n-butyl acrylate Arrhenius parameters for backbiting and tertiary propagation to β-scission via stepwise pulsed laser polymerization. Polym Chem 2019. [DOI: 10.1039/c9py00623k] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A stepwise method to estimate the Arrhenius parameters for backbiting, tertiary propagation, and β-scission in acrylate radical polymerization.
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Affiliation(s)
- Anil B. Vir
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Gent
- Belgium
| | - Yoshi W. Marien
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Gent
- Belgium
| | | | - Christopher Barner-Kowollik
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | | | - Guy B. Marin
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Gent
- Belgium
| | - Dagmar R. D'hooge
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Gent
- Belgium
- Centre for Textile Science and Engineering
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18
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Devlaminck DJG, Van Steenberge PHM, Reyniers MF, D’hooge DR. Deterministic Modeling of Degenerative RAFT Miniemulsion Polymerization Rate and Average Polymer Characteristics: Invalidity of Zero–One Nature at Higher Monomer Conversions. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02111] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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19
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Symoens SH, Olahova N, Muñoz Gandarillas AE, Karimi H, Djokic MR, Reyniers MF, Marin GB, Van Geem KM. State-of-the-art of Coke Formation during Steam Cracking: Anti-Coking Surface Technologies. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03221] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Steffen H. Symoens
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
| | - Natalia Olahova
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
| | | | | | - Marko R. Djokic
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
| | | | - Guy B. Marin
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
| | - Kevin M. Van Geem
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
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20
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Sarris SA, Patil M, Verbeken K, Reyniers MF, Van Geem KM. Effect of Long-Term High Temperature Oxidation on the Coking Behavior of Ni-Cr Superalloys. Materials (Basel) 2018; 11:ma11101899. [PMID: 30287759 PMCID: PMC6212998 DOI: 10.3390/ma11101899] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 09/30/2018] [Accepted: 10/01/2018] [Indexed: 12/19/2022]
Abstract
The service time of an industrial cracker is strongly dependent on the long-term coking behavior and microstructure stability of the reactor coil alloy. Super alloys are known to withstand temperatures up to even 1400 K. In this work, several commercially available alloys have been first exposed to a long term oxidation at 1423 K for 500 h, so-called metallurgic aging. Subsequently, their coking behavior was evaluated in situ in a thermogravimetric setup under ethane steam cracking conditions (Tgasphase = 1173 K, Ptot = 0.1 MPa, XC2H6 = 70%, continuous addition of 41 ppmw S/HC of DMDS, dilution δ = 0.33 kgH2O/kgHC) and compared with their unaged coking behavior. The tested samples were also examined using scanning electron microscopy and energy diffractive X-ray for surface and cross-section analysis. The alloys characterized by increased Cr-Ni content or the addition of Al showed improved stability against bulk oxidation and anti-coking behavior after application of metallurgic aging due to the formation of more stable oxides on the top surface.
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Affiliation(s)
- Stamatis A Sarris
- Department of Materials, Textiles and Chemical Engineering, University of Gent, Technologiepark 914, 9052 Zwijnaarde, Belgium.
| | - Manjunath Patil
- Department of Materials, Textiles and Chemical Engineering, University of Gent, Technologiepark 914, 9052 Zwijnaarde, Belgium.
| | - Kim Verbeken
- Department of Materials, Textiles and Chemical Engineering, University of Gent, Technologiepark 914, 9052 Zwijnaarde, Belgium.
| | - Marie-Françoise Reyniers
- Department of Materials, Textiles and Chemical Engineering, University of Gent, Technologiepark 914, 9052 Zwijnaarde, Belgium.
| | - Kevin M Van Geem
- Department of Materials, Textiles and Chemical Engineering, University of Gent, Technologiepark 914, 9052 Zwijnaarde, Belgium.
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21
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Hernández-Ortiz JC, Van Steenberge PHM, Duchateau JNE, Toloza C, Schreurs F, Reyniers MF, Marin GB, D’hooge DR. Sensitivity Analysis of Single-Phase Isothermal Free Radical-Induced Grafting of Polyethylene. MACROMOL THEOR SIMUL 2018. [DOI: 10.1002/mats.201800036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | | | | | - Guy B. Marin
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 B-9052 Ghent Belgium
| | - Dagmar R. D’hooge
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 B-9052 Ghent Belgium
- Centre for Textile Science and Engineering; Ghent University; Technologiepark 907 B-9052 Ghent Belgium
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22
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Ince A, Carstensen HH, Sabbe M, Reyniers MF, Marin GB. Modeling of thermodynamics of substituted toluene derivatives and benzylic radicals via
group additivity. AIChE J 2018. [DOI: 10.1002/aic.16350] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alper Ince
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914, 9052 Ghent Belgium
| | | | - Maarten Sabbe
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914, 9052 Ghent Belgium
| | | | - Guy B. Marin
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914, 9052 Ghent Belgium
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23
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Rivera de la Cruz JG, Sabbe MK, Reyniers MF. First principle study of chain termination reactions during Fischer-Tropsch Synthesis on χ -Fe 5 C 2 (010). Molecular Catalysis 2018. [DOI: 10.1016/j.mcat.2018.04.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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24
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Van de Vijver R, Sabbe MK, Reyniers MF, Van Geem KM, Marin GB. Ab initio derived group additivity model for intramolecular hydrogen abstraction reactions. Phys Chem Chem Phys 2018. [PMID: 29517772 DOI: 10.1039/c7cp07771h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A set of group additivity values for intramolecular hydrogen abstraction reactions of alkanes, alkenes and alkynes is reported. Calculating 448 reaction rate coefficients at the CBS-QB3 level of theory for 1-2 up to 1-7 hydrogen shift reactions allowed the estimation of ΔGAV° values for 270 groups. The influence of substituents on (1) the attacking radical, (2) the attacked carbon atom, and (3) the carbon chain between the attacking and attacked reactive atom has been systematically studied. Substituents have been varied between hydrogen atoms and sp3, sp2 and sp hybridized carbon atoms. It has been assumed that substituents further away from the reactive atoms or their connecting carbon chain have negligible influences on the kinetics. This group additivity model is applicable to a wide variety of reactions in the 300-1800 K temperature range. Correlations for tunneling coefficients have been generated which are complementary to the ΔGAV°'s to obtain accurate rate coefficients without the need for imaginary frequencies or electronic energies of activation. These correlations depend on the temperature and activation energy of the exothermic step. The group additivity model has been successfully applied to a test set of reactions also calculated at the CBS-QB3 level of theory. A mean absolute deviation of 1.18 to 1.71 has been achieved showing a good overall accuracy of the model.
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Affiliation(s)
- Ruben Van de Vijver
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, Ghent, Belgium.
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25
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Olahová N, Sarris SA, Reyniers MF, Marin GB, Van Geem KM. Coking Tendency of 25Cr-35Ni Alloys: Influence of Temperature, Sulfur Addition, and Cyclic Aging. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b04719] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Natália Olahová
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
| | - Stamatis A. Sarris
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
| | | | - Guy B. Marin
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
| | - Kevin M. Van Geem
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
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26
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Olahová N, Symoens SH, Djokic MR, Ristic ND, Sarris SA, Couvrat M, Riallant F, Chasselin H, Reyniers MF, Van Geem KM. CoatAlloy Barrier Coating for Reduced Coke Formation in Steam Cracking Reactors: Experimental Validation and Simulations. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b04271] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Natália Olahová
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Steffen H. Symoens
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Marko R. Djokic
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Nenad D. Ristic
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Stamatis A. Sarris
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Mathieu Couvrat
- Manoir Industries, 12 Rue des
Ardennes BP8401-Pitres 27108 VAL DE REUIL Cedex, France
| | - Fanny Riallant
- Manoir Industries, 12 Rue des
Ardennes BP8401-Pitres 27108 VAL DE REUIL Cedex, France
| | - Hugues Chasselin
- Manoir Industries, 12 Rue des
Ardennes BP8401-Pitres 27108 VAL DE REUIL Cedex, France
| | | | - Kevin M. Van Geem
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
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27
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Vir AB, Marien YW, Van Steenberge PHM, Barner-Kowollik C, Reyniers MF, Marin GB, D'hooge DR. Access to the β-scission rate coefficient in acrylate radical polymerization by careful scanning of pulse laser frequencies at elevated temperature. REACT CHEM ENG 2018. [DOI: 10.1039/c8re00171e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A novel method to estimate the β-scission rate coefficient in acrylate radical polymerization is presented.
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Affiliation(s)
- Anil B. Vir
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Ghent
- Belgium
| | - Y. W. Marien
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Ghent
- Belgium
| | | | - Christopher Barner-Kowollik
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | | | - Guy B. Marin
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Ghent
- Belgium
| | - Dagmar R. D'hooge
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Ghent
- Belgium
- Centre for Textile Science and Engineering
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28
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Desmet GB, De Rybel N, Van Steenberge PHM, D'hooge DR, Reyniers MF, Marin GB. Ab-Initio-Based Kinetic Modeling to Understand RAFT Exchange: The Case of 2-Cyano-2-Propyl Dodecyl Trithiocarbonate and Styrene. Macromol Rapid Commun 2017; 39. [PMID: 29076596 DOI: 10.1002/marc.201700403] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 08/31/2017] [Indexed: 01/29/2023]
Abstract
Ab-initio-calculated rate coefficients for addition and fragmentation in reversible-addition fragmentation chain transfer (RAFT) polymerization of styrene with 2-cyano-2-propyl dodecyl trithiocarbonate initiated by azobisisobutyronitrile allow the reliable simulation of the experimentally observed conversion, number average chain length, and dispersity. The rate coefficient for addition of a macroradical Ri to the macroRAFT agent Ri X at 333 K (6.8 104 L mol-1 s-1 ) is significantly lower than to the initial RAFT agent R0 X (3.2 106 L mol-1 s-1 ), mainly due to a difference in activation energy (15.4 vs 3.0 kJ mol-1 ), which causes the dispersity to spike in the beginning of the polymerization.
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Affiliation(s)
- Gilles B Desmet
- Laboratory for Chemical Technology, Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark 914, Ghent, 9052, Belgium
| | - Nils De Rybel
- Laboratory for Chemical Technology, Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark 914, Ghent, 9052, Belgium
| | - Paul H M Van Steenberge
- Laboratory for Chemical Technology, Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark 914, Ghent, 9052, Belgium
| | - Dagmar R D'hooge
- Laboratory for Chemical Technology, Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark 914, Ghent, 9052, Belgium
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology, Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark 914, Ghent, 9052, Belgium
| | - Guy B Marin
- Laboratory for Chemical Technology, Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark 914, Ghent, 9052, Belgium
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29
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Sarris SA, Symoens SH, Olahova N, Verbeken K, Reyniers MF, Marin GB, Van Geem KM. Impact of Initial Surface Roughness and Aging on Coke Formation during Ethane Steam Cracking. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02479] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stamatis A. Sarris
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Steffen H. Symoens
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Natalia Olahova
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Kim Verbeken
- Department
of Materials Science and Engineering, Ghent University, Technologiepark 903, 9052 Gent, Belgium
| | | | - Guy B. Marin
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Kevin M. Van Geem
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
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30
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Affiliation(s)
- Stephanie Saerens
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
| | - Maarten K. Sabbe
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
| | - Vladimir V. Galvita
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
| | - Evgeniy A. Redekop
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
- Centre
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Marie-Françoise Reyniers
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
| | - Guy B. Marin
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
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31
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Gegenhuber T, De Keer L, Goldmann AS, Van Steenberge PHM, Mueller JO, Reyniers MF, Menzel JP, D’hooge DR, Barner-Kowollik C. Fusing Light-Induced Step-Growth Processes with RAFT Chemistry for Segmented Copolymer Synthesis: A Synergetic Experimental and Kinetic Modeling Study. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01394] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Thomas Gegenhuber
- School
of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
- Macromolecular
Architectures, Institut für Technische Chemie and Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstraße 18, 76128 Karlsruhe, Germany
- Institut
für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Lies De Keer
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Anja S. Goldmann
- School
of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
- Macromolecular
Architectures, Institut für Technische Chemie and Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstraße 18, 76128 Karlsruhe, Germany
- Institut
für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | | | - Jan O. Mueller
- Macromolecular
Architectures, Institut für Technische Chemie and Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstraße 18, 76128 Karlsruhe, Germany
- Institut
für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | | | - Jan P. Menzel
- School
of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Dagmar R. D’hooge
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
- Centre
for Textile Science and Engineering, Ghent University, Technologiepark
907, 9052 Gent, Belgium
| | - Christopher Barner-Kowollik
- School
of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
- Macromolecular
Architectures, Institut für Technische Chemie and Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstraße 18, 76128 Karlsruhe, Germany
- Institut
für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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32
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Fierens SK, Van Steenberge PHM, Reyniers MF, Marin GB, D'hooge DR. How penultimate monomer unit effects and initiator influence ICAR ATRP of n
-butyl acrylate and methyl methacrylate. AIChE J 2017. [DOI: 10.1002/aic.15851] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Stijn K. Fierens
- Laboratory for Chemical Technology (LCT); Ghent University; Technologiepark 914, Ghent B-9052 Belgium
| | - Paul H. M. Van Steenberge
- Laboratory for Chemical Technology (LCT); Ghent University; Technologiepark 914, Ghent B-9052 Belgium
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology (LCT); Ghent University; Technologiepark 914, Ghent B-9052 Belgium
| | - Guy B. Marin
- Laboratory for Chemical Technology (LCT); Ghent University; Technologiepark 914, Ghent B-9052 Belgium
| | - Dagmar R. D'hooge
- Laboratory for Chemical Technology (LCT); Ghent University; Technologiepark 914, Ghent B-9052 Belgium
- Centre for Textile Science and Engineering (CTSE); Ghent University; Technologiepark 907, Ghent B-9052 Belgium
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33
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Hernández-Ortiz JC, Van Steenberge PHM, Reyniers MF, Marin GB, D'hooge DR, Duchateau JNE, Remerie K, Toloza C, Vaz AL, Schreurs F. Modeling the reaction event history and microstructure of individual macrospecies in postpolymerization modification. AIChE J 2017. [DOI: 10.1002/aic.15842] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Julio C. Hernández-Ortiz
- Ghent University, Laboratory for Chemical Technology (LCT); Technologiepark 914, B-9052 Gent; Belgium
| | - Paul H. M. Van Steenberge
- Ghent University, Laboratory for Chemical Technology (LCT); Technologiepark 914, B-9052 Gent; Belgium
| | - Marie-Françoise Reyniers
- Ghent University, Laboratory for Chemical Technology (LCT); Technologiepark 914, B-9052 Gent; Belgium
| | - Guy B. Marin
- Ghent University, Laboratory for Chemical Technology (LCT); Technologiepark 914, B-9052 Gent; Belgium
| | - Dagmar R. D'hooge
- Ghent University, Laboratory for Chemical Technology (LCT); Technologiepark 914, B-9052 Gent; Belgium
- Ghent University, Centre for Textile Science and Engineering; Technologiepark 907, B-9052 Gent; Belgium
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34
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Van Steenberge PHM, Vandenbergh J, Reyniers MF, Junkers T, D’hooge DR, Marin GB. Kinetic Monte Carlo Generation of Complete Electron Spray Ionization Mass Spectra for Acrylate Macromonomer Synthesis. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00333] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Paul H. M. Van Steenberge
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 914, B-9052 Gent, Belgium
| | - Joke Vandenbergh
- Polymer Reaction Design Group, Institute for Materials Research (IMO), Hasselt University, Agoralaan Building D, B-3590 Diepenbeek, Belgium
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 914, B-9052 Gent, Belgium
| | - Tanja Junkers
- Polymer Reaction Design Group, Institute for Materials Research (IMO), Hasselt University, Agoralaan Building D, B-3590 Diepenbeek, Belgium
- IMEC associated lab IMOMEC, Wetenschapspark 1, B-3590 Diepenbeek, Belgium
| | - Dagmar R. D’hooge
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 914, B-9052 Gent, Belgium
- Centre for Textile Science and Engineering, Ghent University, Technologiepark 904, B-9052 Gent, Belgium
| | - Guy B. Marin
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 914, B-9052 Gent, Belgium
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35
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Marien YW, Van Steenberge PHM, Barner-Kowollik C, Reyniers MF, Marin GB, D’hooge DR. Kinetic Monte Carlo Modeling Extracts Information on Chain Initiation and Termination from Complete PLP-SEC Traces. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02627] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yoshi W. Marien
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Zwijnaarde (Ghent), Belgium
| | - Paul H. M. Van Steenberge
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Zwijnaarde (Ghent), Belgium
| | - Christopher Barner-Kowollik
- Preparative
Macromolecular Chemistry, Institut für Technische Chemie und
Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse
18, 76128 Karlsruhe, Germany
- Institut
für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- School
of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), 2 George Street, Brisbane, Australia
| | - Marie-Françoise Reyniers
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Zwijnaarde (Ghent), Belgium
| | - Guy B. Marin
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Zwijnaarde (Ghent), Belgium
| | - Dagmar R. D’hooge
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Zwijnaarde (Ghent), Belgium
- Department
of Textiles, Ghent University, Technologiepark 907, B-9052 Zwijnaarde (Ghent), Belgium
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36
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Sarris SA, Olahova N, Verbeken K, Reyniers MF, Marin GB, Van Geem KM. Optimization of the in Situ Pretreatment of High Temperature Ni–Cr Alloys for Ethane Steam Cracking. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04537] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stamatis A. Sarris
- Laboratory for Chemical
Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Natalia Olahova
- Laboratory for Chemical
Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Kim Verbeken
- Department of Materials Science and Engineering, Ghent University, Technologiepark
903, 9052 Gent, Belgium
| | | | - Guy B. Marin
- Laboratory for Chemical
Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
| | - Kevin M. Van Geem
- Laboratory for Chemical
Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
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37
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John M, Alexopoulos K, Reyniers MF, Marin GB. Mechanistic insights into the formation of butene isomers from 1-butanol in H-ZSM-5: DFT based microkinetic modelling. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02474b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
First principles microkinetic modelling provides in-depth mechanistic insights into the competing reaction pathways for zeolite-catalyzed conversion of 1-butanol to butene isomers.
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Affiliation(s)
- Mathew John
- Laboratory for Chemical Technology
- Ghent University
- B-9052 Gent
- Belgium
| | | | | | - Guy B. Marin
- Laboratory for Chemical Technology
- Ghent University
- B-9052 Gent
- Belgium
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38
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Desmet GB, Marien YW, Van Steenberge PHM, D'hooge DR, Reyniers MF, Marin GB. Ab initio based kinetic Monte Carlo analysis to unravel the propagation kinetics in vinyl acetate pulsed laser polymerization. Polym Chem 2017. [DOI: 10.1039/c7py01008g] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The radical propagation kinetics of vinyl acetate in pulsed laser polymerization (PLP) is studied by combining ab initio calculated rate coefficients with kinetic Monte Carlo modeling of PLP spectra.
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Affiliation(s)
| | - Yoshi W. Marien
- Laboratory for Chemical Technology
- Ghent University
- Gent
- Belgium
| | | | - Dagmar R. D'hooge
- Laboratory for Chemical Technology
- Ghent University
- Gent
- Belgium
- Centre for Textiles Science and Engineering
| | | | - Guy B. Marin
- Laboratory for Chemical Technology
- Ghent University
- Gent
- Belgium
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39
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Devlaminck DJG, Van Steenberge PHM, De Keer L, Reyniers MF, D'hooge DR. A detailed mechanistic study of bulk MADIX of styrene and its chain extension. Polym Chem 2017. [DOI: 10.1039/c7py00961e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
By combining experimental and modeling tools, a detailed characterization study of MADIX properties becomes possible.
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Affiliation(s)
| | | | - Lies De Keer
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Ghent
- Belgium
| | | | - Dagmar R. D'hooge
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Ghent
- Belgium
- Centre for Textile Science and Engineering
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40
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Desmet GB, Sabbe MK, D'hooge DR, Espeel P, Celasun S, Marin GB, Du Prez FE, Reyniers MF. Thiol-Michael addition in polar aprotic solvents: nucleophilic initiation or base catalysis? Polym Chem 2017. [DOI: 10.1039/c7py00005g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The thiol-Michael addition of ethanethiol to ethyl acrylate, methyl vinylsulfone and maleimide initiated by ethyl-, diethyl-, triethylamine and triethylphosphine in tetrahydrofuran (THF) is investigated at room temperature.
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Affiliation(s)
| | | | - Dagmar. R. D'hooge
- Laboratory for Chemical Technology
- Ghent University
- Gent
- Belgium
- Department of Textiles
| | - Pieter Espeel
- Polymer Chemistry Research Group
- Ghent University
- B-9000 Gent
- Belgium
| | - Sensu Celasun
- Polymer Chemistry Research Group
- Ghent University
- B-9000 Gent
- Belgium
| | - Guy B. Marin
- Laboratory for Chemical Technology
- Ghent University
- Gent
- Belgium
| | - Filip E. Du Prez
- Polymer Chemistry Research Group
- Ghent University
- B-9000 Gent
- Belgium
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41
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Sabbe MK, Canduela-Rodriguez G, Joly JF, Reyniers MF, Marin GB. Ab initio coverage-dependent microkinetic modeling of benzene hydrogenation on Pd(111). Catal Sci Technol 2017. [DOI: 10.1039/c7cy00962c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Coverage-dependent calculations are required for an accurate DFT-based prediction of the activity and a correct mechanistic understanding of catalytic hydrogenation.
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Affiliation(s)
- Maarten K. Sabbe
- Laboratory for Chemical Technology
- Universiteit Gent
- 9052 Gent
- Belgium
| | | | | | | | - Guy B. Marin
- Laboratory for Chemical Technology
- Universiteit Gent
- 9052 Gent
- Belgium
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42
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John M, Alexopoulos K, Reyniers MF, Marin GB. Effect of zeolite confinement on the conversion of 1-butanol to butene isomers: mechanistic insights from DFT based microkinetic modelling. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00536a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
First principles microkinetic modelling shows that, unlike in H-ZSM-5 and H-ZSM-22, trans-2-butene formation in H-FER occurs via direct dehydration of 1-butanol.
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Affiliation(s)
- Mathew John
- Laboratory for Chemical Technology
- Ghent University
- B-9052 Ghent
- Belgium
| | | | | | - Guy B. Marin
- Laboratory for Chemical Technology
- Ghent University
- B-9052 Ghent
- Belgium
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43
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Marien YW, Van Steenberge PHM, Kockler KB, Barner-Kowollik C, Reyniers MF, Marin GB, D'hooge DR. Estimating the photodissociation quantum yield from PLP-SEC peak heights. Polym Chem 2017. [DOI: 10.1039/c7py00412e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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44
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Fierens SK, Telitel S, Van Steenberge PHM, Reyniers MF, Marin GB, Lutz JF, D’hooge DR. Model-Based Design To Push the Boundaries of Sequence Control. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01699] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Stijn K. Fierens
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9000 Gent, Belgium
- Precision
Macromolecular Chemistry, Institut Charles Sadron, 23 Rue du Loess, Strasbourg 67034, France
| | - Sofia Telitel
- Precision
Macromolecular Chemistry, Institut Charles Sadron, 23 Rue du Loess, Strasbourg 67034, France
| | | | | | - Guy B. Marin
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9000 Gent, Belgium
| | - Jean-François Lutz
- Precision
Macromolecular Chemistry, Institut Charles Sadron, 23 Rue du Loess, Strasbourg 67034, France
| | - Dagmar R. D’hooge
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9000 Gent, Belgium
- Department
of Textiles, Ghent University, Technologiepark 907, B-9000 Gent, Belgium
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45
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Desmet GB, D'hooge DR, Omurtag PS, Espeel P, Marin GB, Du Prez FE, Reyniers MF. Quantitative First-Principles Kinetic Modeling of the Aza-Michael Addition to Acrylates in Polar Aprotic Solvents. J Org Chem 2016; 81:12291-12302. [PMID: 27978758 DOI: 10.1021/acs.joc.6b02218] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This work presents a detailed computational study and kinetic analysis of the aza-Michael addition of primary and secondary amines to acrylates in an aprotic solvent. Accurate rate coefficients for all elementary steps in the various competing mechanisms are calculated using an ONIOM-based approach in which the full system is calculated with M06-2X/6-311+G(d,p) and the core system with CBS-QB3 corrected for solvation using COSMO-RS. Diffusional contributions are taken into account using the coupled encounter pair model with diffusion coefficients calculated based on molecular dynamics simulations. The calculated thermodynamic and kinetic parameters for all forward and reverse elementary reactions are fed to a microkinetic model giving excellent agreement with experimental data obtained using GC analysis. Rate analysis reveals that for primary and secondary amines, the aza-Michael addition to ethyl acrylate occurs preferentially according to a 1,2-addition mechanism, consisting of the pseudoequilibrated formation of a zwitterion followed by a rate controlling amine assisted proton transfer toward the singly substituted product. The alternative 1,4-addition becomes competitive if substituents are present on the amine or double bond of the acrylate. Primary amines react faster than secondary amines due to increased solvation of the zwitterionic intermediate and less sterically hindered proton transfer.
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Affiliation(s)
- Gilles B Desmet
- Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Gent, Belgium
| | - Dagmar R D'hooge
- Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Gent, Belgium.,Department of Textiles, Ghent University , Technologiepark 907, B-9052 Gent, Belgium
| | - Pinar Sinem Omurtag
- Polymer Chemistry Research Group, Ghent University , Krijgslaan 281 S4-bis, B-9000 Gent, Belgium
| | - Pieter Espeel
- Polymer Chemistry Research Group, Ghent University , Krijgslaan 281 S4-bis, B-9000 Gent, Belgium
| | - Guy B Marin
- Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Gent, Belgium
| | - Filip E Du Prez
- Polymer Chemistry Research Group, Ghent University , Krijgslaan 281 S4-bis, B-9000 Gent, Belgium
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Gent, Belgium
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46
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Redekop EA, Saerens S, Galvita VV, González IP, Sabbe M, Bliznuk V, Reyniers MF, Marin GB. Early stages in the formation and burning of graphene on a Pt/Mg(Al)O dehydrogenation catalyst: A temperature- and time-resolved study. J Catal 2016. [DOI: 10.1016/j.jcat.2016.10.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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47
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Abstract
This work presents a detailed computational study and kinetic analysis of the aminolysis of dithioates, dithiobenzoates, trithiocarbonates, xanthates, and thiocarbamates, which are frequently used as chain-transfer agents for reversible addition-fragmentation chain-transfer (RAFT) polymerization. Rate coefficients were obtained from ab initio calculations, taking into account a diffusional contribution according to the encounter pair model. A kinetic model was constructed and reveals a reaction mechanism of four elementary steps: (i) formation of a zwitterionic intermediate, (ii) formation of a complex intermediate in which an assisting amine molecule takes over the proton from the zwitterionic intermediate, (iii) breakdown of the complex into a neutral tetrahedral intermediate with release of the assisting amine molecule, and (iv) amine-assisted breakdown of the neutral intermediate to the products. Furthermore, a comparative analysis indicates that the alkanedithioates and dithiobenzoates react the fastest, followed, respectively, by xanthates and trithiocarbonates, which react almost equally fast, and dithiocarbamates, which are not reactive at typical experimentally used conditions.
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Affiliation(s)
- Gilles B Desmet
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Dagmar R D'hooge
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Maarten K Sabbe
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Guy B Marin
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
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48
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Olahova N, Djokic MR, Van de Vijver R, Ristic ND, Marin GB, Reyniers MF, Van Geem KM. Thermal Decomposition of Sulfur Compounds and their Role in Coke Formation during Steam Cracking of Heptane. Chem Eng Technol 2016. [DOI: 10.1002/ceat.201600219] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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49
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De Rybel N, Van Steenberge PHM, Reyniers MF, Barner-Kowollik C, D'hooge DR, Marin GB. An Update on the Pivotal Role of Kinetic Modeling for the Mechanistic Understanding and Design of Bulk and Solution RAFT Polymerization. MACROMOL THEOR SIMUL 2016. [DOI: 10.1002/mats.201600048] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Nils De Rybel
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 B-9052 Zwijnaarde (Ghent) Belgium
| | - Paul H. M. Van Steenberge
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 B-9052 Zwijnaarde (Ghent) Belgium
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 B-9052 Zwijnaarde (Ghent) Belgium
| | - Christopher Barner-Kowollik
- Preparative Macromolecular Chemistry; Institut für Technische Chemie und Polymerchemie; Karlsruhe Institute of Technology (KIT); Engesserstrasse 18 76128 Karlsruhe Germany
- Institut für Biologische Grenzflächen; Karlsruhe Institute of Technology (KIT); Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- School of Chemistry, Physics and Mechanical Engineering; Queensland University of Technology (QUT); Brisbane, 2 George Street QLD 4000 Australia
| | - Dagmar R. D'hooge
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 B-9052 Zwijnaarde (Ghent) Belgium
- Department of Textiles; Ghent University; Technologiepark 907 B-9052 Zwijnaarde (Ghent) Belgium
| | - Guy. B. Marin
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 B-9052 Zwijnaarde (Ghent) Belgium
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50
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Van der Borght K, Batchu R, Galvita VV, Alexopoulos K, Reyniers MF, Thybaut JW, Marin GB. Insights into the Reaction Mechanism of Ethanol Conversion into Hydrocarbons on H-ZSM-5. Angew Chem Int Ed Engl 2016; 55:12817-21. [DOI: 10.1002/anie.201607230] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Kristof Van der Borght
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 9052 Gent Belgium
| | - Rakesh Batchu
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 9052 Gent Belgium
| | - Vladimir V. Galvita
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 9052 Gent Belgium
| | | | | | - Joris W. Thybaut
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 9052 Gent Belgium
| | - Guy B. Marin
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 9052 Gent Belgium
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