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Xie J, Firth DS, Cordero-Lanzac T, Airi A, Negri C, Øien-Ødegaard S, Lillerud KP, Bordiga S, Olsbye U. MAPO-18 Catalysts for the Methanol to Olefins Process: Influence of Catalyst Acidity in a High-Pressure Syngas (CO and H 2) Environment. ACS Catal 2022; 12:1520-1531. [PMID: 35096471 PMCID: PMC8788383 DOI: 10.1021/acscatal.1c04694] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/12/2021] [Indexed: 12/01/2022]
Abstract
The transition from integrated petrochemical complexes toward decentralized chemical plants utilizing distributed feedstocks calls for simpler downstream unit operations. Less separation steps are attractive for future scenarios and provide an opportunity to design the next-generation catalysts, which function efficiently with effluent reactant mixtures. The methanol to olefins (MTO) reaction constitutes the second step in the conversion of CO2, CO, and H2 to light olefins. We present a series of isomorphically substituted zeotype catalysts with the AEI topology (MAPO-18s, M = Si, Mg, Co, or Zn) and demonstrate the superior performance of the M(II)-substituted MAPO-18s in the conversion of MTO when tested at 350 °C and 20 bar with reactive feed mixtures consisting of CH3OH/CO/CO2/H2. Co-feeding high pressure H2 with methanol improved the catalyst activity over time, but simultaneously led to the hydrogenation of olefins (olefin/paraffin ratio < 0.5). Co-feeding H2/CO/CO2/N2 mixtures with methanol revealed an important, hitherto undisclosed effect of CO in hindering the hydrogenation of olefins over the Brønsted acid sites (BAS). This effect was confirmed by dedicated ethene hydrogenation studies in the absence and presence of CO co-feed. Assisted by spectroscopic investigations, we ascribe the favorable performance of M(II)APO-18 under co-feed conditions to the importance of the M(II) heteroatom in altering the polarity of the M-O bond, leading to stronger BAS. Comparing SAPO-18 and MgAPO-18 with BAS concentrations ranging between 0.2 and 0.4 mmol/gcat, the strength of the acidic site and not the density was found to be the main activity descriptor. MgAPO-18 yielded the highest activity and stability upon syngas co-feeding with methanol, demonstrating its potential to be a next-generation MTO catalyst.
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Affiliation(s)
- Jingxiu Xie
- Centre
for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Sem Saelandsvei 26, Oslo N-0315, Norway
| | - Daniel S. Firth
- Centre
for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Sem Saelandsvei 26, Oslo N-0315, Norway
| | - Tomás Cordero-Lanzac
- Centre
for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Sem Saelandsvei 26, Oslo N-0315, Norway
| | - Alessia Airi
- Department
of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via G. Quarello 15, I-10135 and Via P. Giuria 7, Torino 10125, Italy
| | - Chiara Negri
- Centre
for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Sem Saelandsvei 26, Oslo N-0315, Norway
| | - Sigurd Øien-Ødegaard
- Centre
for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Sem Saelandsvei 26, Oslo N-0315, Norway
| | - Karl Petter Lillerud
- Centre
for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Sem Saelandsvei 26, Oslo N-0315, Norway
| | - Silvia Bordiga
- Department
of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via G. Quarello 15, I-10135 and Via P. Giuria 7, Torino 10125, Italy
| | - Unni Olsbye
- Centre
for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Sem Saelandsvei 26, Oslo N-0315, Norway
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Potter ME. Down the Microporous Rabbit Hole of Silicoaluminophosphates: Recent Developments on Synthesis, Characterization, and Catalytic Applications. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02278] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Matthew E. Potter
- Department of Chemistry, University of Southampton, Southampton, Hampshire SO17 1BJ, United Kingdom
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3
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Potter ME, Armstrong LM, Carravetta M, Mezza TM, Raja R. Designing Multi-Dopant Species in Microporous Architectures to Probe Reaction Pathways in Solid-Acid Catalysis. Front Chem 2020; 8:171. [PMID: 32257997 PMCID: PMC7089933 DOI: 10.3389/fchem.2020.00171] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 02/25/2020] [Indexed: 11/15/2022] Open
Abstract
The introduction of two distinct dopants in a microporous zeotype framework can lead to the formation of isolated, or complementary catalytically active sites. Careful selection of dopants and framework topology can facilitate enhancements in catalysts efficiency in a range of reaction pathways, leading to the use of sustainable precursors (bioethanol) for plastic production. In this work we describe our unique synthetic design procedure for creating a multi-dopant solid-acid catalyst (MgSiAPO-34), designed to improve and contrast with the performance of SiAPO-34 (mono-dopant analog), for the dehydration of ethanol to ethylene. We employ a range of characterization techniques to explore the influence of magnesium substitution, with specific attention to the acidity of the framework. Through a combined catalysis, kinetic analysis and computational fluid dynamics (CFD) study we explore the reaction pathway of the system, with emphasis on the improvements facilitated by the multi-dopant MgSiAPO-34 species. The experimental data supports the validation of the CFD results across a range of operating conditions; both of which supports our hypothesis that the presence of the multi-dopant solid acid centers enhances the catalytic performance. Furthermore, the development of a robust computational model, capable of exploring chemical catalytic flows within a reactor system, affords further avenues for enhancing reactor engineering and process optimisation, toward improved ethylene yields, under mild conditions.
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Affiliation(s)
- Matthew E Potter
- Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, United Kingdom
| | - Lindsay-Marie Armstrong
- Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, United Kingdom
| | - Marina Carravetta
- Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, United Kingdom
| | - Thomas M Mezza
- UOP, A Honeywell Company, Des Plaines, IL, United States
| | - Robert Raja
- Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, United Kingdom
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4
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Li L, Slater B, Yan Y, Wang C, Li Y, Yu J. Necessity of Heteroatoms for Realizing Hypothetical Aluminophosphate Zeolites: A High-Throughput Computational Approach. J Phys Chem Lett 2019; 10:1411-1415. [PMID: 30852904 DOI: 10.1021/acs.jpclett.9b00136] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Aluminophosphate zeolites (AlPOs) have important applications in adsorption, separation, and catalysis. Millions of hypothetical zeolite structures have been predicted, but experimentally realizing them as AlPOs requires a priori knowledge on whether heteroatom incorporations are necessary to stabilize their frameworks. Previous computations focus on the energy difference before and after heteroatom incorporation, which are not applicable for high-throughput computations because of the combinatorial explosion of possible incorporation sites. Here, we establish a new model to estimate the probability of a hypothetical structure being a pure or a heteroatom-stabilized AlPO, which is based on the Mahalanobis distances between a hypothetical structure and its neighboring reference structures in distortion-energy plots. Our approach avoids numerous attempts at heteroatom incorporation and is therefore applicable for high-throughput structure evaluation. Using this model, we have predicted 17 050 hypothetical structures being realizable as pure AlPOs and 12 039 structures realizable only via heteroatom incorporation. This will provide important guidance toward the synthesis of new AlPOs.
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Affiliation(s)
- Lin Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry , Jilin University , 2699 Qianjin Street , Changchun 130012 , China
| | - Ben Slater
- Department of Chemistry , University College London , 20 Gordon Street , London WC1H 0AJ , United Kingdom
| | - Yan Yan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry , Jilin University , 2699 Qianjin Street , Changchun 130012 , China
| | - Chuanming Wang
- SINOPEC Shanghai Research Institute of Petrochemical Technology , Shanghai 201208 , China
| | - Yi Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry , Jilin University , 2699 Qianjin Street , Changchun 130012 , China
- International Center of Future Science , Jilin University , Changchun 130012 , China
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry , Jilin University , 2699 Qianjin Street , Changchun 130012 , China
- International Center of Future Science , Jilin University , Changchun 130012 , China
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Newland SH, Sinkler W, Mezza T, Bare SR, Raja R. Influence of dopant substitution mechanism on catalytic properties within hierarchical architectures. Proc Math Phys Eng Sci 2016; 472:20160095. [PMID: 27493563 DOI: 10.1098/rspa.2016.0095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A range of hierarchically porous (HP) AlPO-5 catalysts, with isomorphously substituted transition metal ions, have been synthesized using an organosilane as a soft template. By employing a range of structural and spectroscopic characterization protocols, the properties of the dopant-substituted species within the HP architectures have been carefully evaluated. The resulting nature of the active site is shown to have a direct impact on the ensuing catalytic properties in the liquid-phase Beckmann rearrangement of cyclic ketones.
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Affiliation(s)
| | | | - Thomas Mezza
- UOP LLC , a Honeywell Company , Des Plaines, IL 60017, USA
| | - Simon R Bare
- UOP LLC , a Honeywell Company , Des Plaines, IL 60017, USA
| | - Robert Raja
- School of Chemistry , University of Southampton , Southampton SO17 1BJ, UK
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6
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Sreenivasulu P, Nandan D, Sreedhar B, Viswanadham N. Room temperature synthesis of ZnAlPO4 nanoparticles and their catalytic applications. RSC Adv 2013. [DOI: 10.1039/c3ra41760c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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7
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Pillai RS, Jasra RV. Computational study for water sorption in AlPO(4)-5 and AlPO(4)-11 molecular sieves. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1755-1764. [PMID: 20030353 DOI: 10.1021/la902629g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The unusual water adsorption behavior in aluminophosphate molecular sieves AlPO(4)-5 and AlPO(4)-11 was studied using canonical Monte Carlo and periodic density functional theory (DFT) calculation. The number of adsorbed water molecules per cavity ranging from 1 to 12 were located inside the molecular sieves by canonical Monte Carlo simulation methods using a "compass" forcefield. The DFT calculations were done for optimizing each structure with and without adsorbed water molecules employing generalized gradient approximation with the Perdew-Burke-Ernzerhof exchange-correction functional. Both classical and quantum mechanical calculations have exhibited hydrogen bonding between adsorbed water molecules inside the main 12-membered ring. The Al-O-P angles were observed to decrease after adsorbing water molecules in geometry optimized AlPO(4)-5 and AlPO(4)-11 molecular sieves. DFT calculations illustrate that the initial loading of water in the large cavity is due to the mild acidity in the framework but the isobaric increase in loading is due to the abundant hydrogen bonding between adsorbed water at higher water loading.
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Affiliation(s)
- Renjith S Pillai
- Discipline of Inorganic Materials and Catalysis, Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research, Bhavnagar-364 002, India
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8
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Tommaso DD, de Leeuw NH. The Onset of Calcium Carbonate Nucleation: A Density Functional Theory Molecular Dynamics and Hybrid Microsolvation/Continuum Study. J Phys Chem B 2008; 112:6965-75. [DOI: 10.1021/jp801070b] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Devis Di Tommaso
- Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H OAJ, United Kingdom
| | - Nora H. de Leeuw
- Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H OAJ, United Kingdom
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9
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Larin AV, Semenyuk RA, Trubnikov DN, Vercauteren DP. Electrostatic potential and field approximation for aluminosilicates in cation-substituted forms. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2007. [DOI: 10.1134/s0036024407040012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Synthesis of SAPO-11 and MgAPO-11 Molecular Sieves in Water–Butanol Biphase Media. CHINESE JOURNAL OF CATALYSIS 2007. [DOI: 10.1016/s1872-2067(07)60018-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Larin AV, Mortier WJ, Vercauteren DP. Quick scheme for evaluation of atomic charges in arbitrary aluminophosphate sieves on the basis of electron densities calculated with DFT methods. J Comput Chem 2007; 28:1695-703. [PMID: 17342708 DOI: 10.1002/jcc.20660] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
It is demonstrated that unique and simple analytical functions are justified for the atomic charge dependences q of the T (T = Al, P) and O atoms of aluminophosphates (AlPOs) using DFT calculations with several basis sets, starting from STO-3G to 3-21G and 6-21G**. Three internal (bonds, angles, ...) coordinates for the charge dependences of the T atoms and four coordinates for the O are sufficient to reach a precision of 1.8% for the fitted q(Al), 1.0% for q(P), and 2.5% for q(O) relatively to the values calculated at any basis set level. The proposed strategy consists in an iterative scheme starting from charge dependences based on the neighbor's positions only. Electrostatic potential values are computed to illustrate the differences between the calculated and fitted charges in the considered AlPO models.
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Affiliation(s)
- A V Larin
- Department of Chemistry, Moscow State University, Moscow B-234, 119899, Russia
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12
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Molecular Modelling in Zeolite Science. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/s0167-2991(07)80807-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
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13
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Elanany M, Vercauteren D, Kubo M, Miyamoto A. The acidic properties of H-MeAlPO-5 (Me=Si, Ti, or Zr): A periodic density functional study. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.molcata.2005.12.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Chatterjee A. A reactivity index study to rationalize the effect of dopants on Brönsted and Lewis acidity occurring in MeAlPOs. J Mol Graph Model 2006; 24:262-70. [PMID: 16243556 DOI: 10.1016/j.jmgm.2005.09.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2005] [Revised: 09/09/2005] [Accepted: 09/09/2005] [Indexed: 10/25/2022]
Abstract
The influence of both bivalent and trivalent metal substituents from a range of metal cation (Co, Mn, Mg, Fe and Cr) on the acidic property (both Brönsted and Lewis) of metal substituted aluminum phosphate MeAlPOs is monitored. The influence of the environment of the acid site is studied both by localized cluster and periodic calculations to propose that the acidity of AlPOs can be predictable with accuracy so that AlPO material with desired acidity can be designed. A semi-quantitative reactivity scale within the domain of hard soft acid-base (HSAB) principle is proposed in terms of the metal substitutions using density functional theory (DFT). It is observed that for the bivalent metal cations Lewis acidity linearly increases with ionic size, where as the Brönsted acidity is solely dependent on the nearest oxygen environment. Intramolecular and intermolecular interactions show that once active site of the interacting species is identified, the influence of the environment can be prescribed. Mg(II)-doped AlPO-34 shows highest Brönsted acidity and whereas Cr(III)-doped species shows lowest acidity. Fe(II)/Fe(III)-doped AlPO-34 shows highest Lewis acidity, whereas Mn(III), Mg (II) shows lowest acidity.
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Affiliation(s)
- Abhijit Chatterjee
- Department of Material Science, Accelrys, Nishishinbashi TS Bldg. 11F, 3-3-1 Nishishinbashi, Minato-ku, Tokyo 105-0003, Japan.
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15
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Saadoune I, Catlow CRA, Doll K, Corà F. Water Adsorption and Acidity in MnII–HAlPO-34 Catalysts. MOLECULAR SIMULATION 2004. [DOI: 10.1080/08927020410001717227] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Modeling the framework stability and catalytic activity of pure and transition metal-doped zeotypes. J SOLID STATE CHEM 2003. [DOI: 10.1016/s0022-4596(03)00275-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Saadoune I, Corà F, Alfredsson M, Catlow CRA. Computational Study of the Structural and Electronic Properties of Dopant Ions in Microporous AlPOs. 2. Redox Catalytic Activity of Trivalent Transition Metal Ions. J Phys Chem B 2003. [DOI: 10.1021/jp027286+] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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