1
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Selby TM, Goulay F, Soorkia S, Ray A, Jasper AW, Klippenstein SJ, Morozov AN, Mebel AM, Savee JD, Taatjes CA, Osborn DL. Radical-Radical Reactions in Molecular Weight Growth: The Phenyl + Propargyl Reaction. J Phys Chem A 2023; 127:2577-2590. [PMID: 36905386 DOI: 10.1021/acs.jpca.2c08121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
The mechanism for hydrocarbon ring growth in sooting environments is still the subject of considerable debate. The reaction of phenyl radical (C6H5) with propargyl radical (H2CCCH) provides an important prototype for radical-radical ring-growth pathways. We studied this reaction experimentally over the temperature range of 300-1000 K and pressure range of 4-10 Torr using time-resolved multiplexed photoionization mass spectrometry. We detect both the C9H8 and C9H7 + H product channels and report experimental isomer-resolved product branching fractions for the C9H8 product. We compare these experiments to theoretical kinetics predictions from a recently published study augmented by new calculations. These ab initio transition state theory-based master equation calculations employ high-quality potential energy surfaces, conventional transition state theory for the tight transition states, and direct CASPT2-based variable reaction coordinate transition state theory (VRC-TST) for the barrierless channels. At 300 K only the direct adducts from radical-radical addition are observed, with good agreement between experimental and theoretical branching fractions, supporting the VRC-TST calculations of the barrierless entrance channel. As the temperature is increased to 1000 K we observe two additional isomers, including indene, a two-ring polycyclic aromatic hydrocarbon, and a small amount of bimolecular products C9H7 + H. Our calculated branching fractions for the phenyl + propargyl reaction predict significantly less indene than observed experimentally. We present further calculations and experimental evidence that the most likely cause of this discrepancy is the contribution of H atom reactions, both H + indenyl (C9H7) recombination to indene and H-assisted isomerization that converts less stable C9H8 isomers into indene. Especially at low pressures typical of laboratory investigations, H-atom-assisted isomerization needs to be considered. Regardless, the experimental observation of indene demonstrates that the title reaction leads, either directly or indirectly, to the formation of the second ring in polycyclic aromatic hydrocarbons.
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Affiliation(s)
- Talitha M Selby
- Department of Mathematics and Natural Sciences, University of Wisconsin-Milwaukee, West Bend, Wisconsin 53095, United States
| | - Fabien Goulay
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Satchin Soorkia
- Institut des Sciences Moléculaires d'Orsay, Université Paris-Saclay, CNRS, F-91405 Orsay, France
| | - Amelia Ray
- Department of Chemistry, University of Wisconsin-Parkside, Kenosha, Wisconsin 53144, United States
| | - Ahren W Jasper
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Stephen J Klippenstein
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Alexander N Morozov
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, United States
| | - Alexander M Mebel
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, United States
| | - John D Savee
- KLA Corporation, Milpitas, California 95035, United States
| | - Craig A Taatjes
- Combustion Research Facility, Sandia National Laboratories, Mail Stop 9055, Livermore, California 94551, United States
| | - David L Osborn
- Combustion Research Facility, Sandia National Laboratories, Mail Stop 9055, Livermore, California 94551, United States
- Department of Chemical Engineering, University of California, Davis, Davis, California 95616, United States
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2
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Martí C, Michelsen HA, Najm HN, Zádor J. Comprehensive Kinetics on the C 7H 7 Potential Energy Surface under Combustion Conditions. J Phys Chem A 2023; 127:1941-1959. [PMID: 36802584 DOI: 10.1021/acs.jpca.2c08035] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
The automated kinetics workflow code, KinBot, was used to explore and characterize the regions of the C7H7 potential energy surface that are relevant to combustion environments and especially soot inception. We first explored the lowest-energy region, which includes the benzyl, fulvenallene + H, and cyclopentadienyl + acetylene entry points. We then expanded the model to include two higher-energy entry points, vinylpropargyl + acetylene and vinylacetylene + propargyl. The automated search was able to uncover the pathways from the literature. In addition, three important new routes were discovered: a lower-energy pathway connecting benzyl with vinylcyclopentadienyl, a decomposition mechanism from benzyl that results in side-chain hydrogen atom loss to produce fulvenallene + H, and shorter and lower energy routes to the dimethylene-cyclopentenyl intermediates. We systematically reduced the extended model to a chemically relevant domain composed of 63 wells, 10 bimolecular products, 87 barriers, and 1 barrierless channel and constructed a master equation using the CCSD(T)-F12a/cc-pVTZ//ωB97X-D/6-311++G(d,p) level of theory to provide rate coefficients for chemical modeling. Our calculated rate coefficients show excellent agreement with measured ones. We also simulated concentration profiles and calculated branching fractions from the important entry points to provide an interpretation of this important chemical landscape.
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Affiliation(s)
- Carles Martí
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States
| | - Hope A Michelsen
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Habib N Najm
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States
| | - Judit Zádor
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States
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3
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Caster KL, Selby TM, Osborn DL, Le Picard SD, Goulay F. Product Detection of the CH(X 2Π) Radical Reaction with Cyclopentadiene: A Novel Route to Benzene. J Phys Chem A 2021; 125:6927-6939. [PMID: 34374546 DOI: 10.1021/acs.jpca.1c03517] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of the methylidyne radical (CH(X2Π)) with cyclopentadiene (c-C5H6) is studied in the gas phase at 4 Torr and 373 K using a multiplexed photoionization mass spectrometer. Under multiple collision conditions, the dominant product channel observed is the formation of C6H6 + H. Fitting the photoionization spectrum using reference spectra allows for isomeric resolution of C6H6 isomers, where benzene is the largest contributor with a relative branching fraction of 90 (±5)%. Several other C6H6 isomers are found to have smaller contributions, including fulvene with a branching fraction of 8 (±5)%. Master Equation calculations for four different entrance channels on the C6H7 potential energy surface are performed to explore the competition between CH cycloaddition to a C═C bond vs CH insertion into C-H bonds of cyclopentadiene. Previous studies on CH addition to unsaturated hydrocarbons show little evidence for the C-H insertion pathway. The present computed branching fractions support benzene as the sole cyclic product from CH cycloaddition, whereas fulvene is the dominant product from two of the three pathways for CH insertion into the C-H bonds of cyclopentadiene. The combination of experiment with Master Equation calculations implies that insertion must account for ∼10 (±5)% of the overall CH + cyclopentadiene mechanism.
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Affiliation(s)
- Kacee L Caster
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Talitha M Selby
- Department of Mathematics and Natural Sciences, University of Wisconsin-Milwaukee, West Bend, Wisconsin 53095, United States
| | - David L Osborn
- Combustion Research Facility, Sandia National Laboratories, Mail Stop 9055, Livermore, California 94551, United States
| | - Sebastien D Le Picard
- IPR (Institut de Physique de Rennes), UMR 6251, Univ Rennes, CNRS, F-35000 Rennes, France
| | - Fabien Goulay
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
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4
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He C, Nikolayev AA, Zhao L, Thomas AM, Doddipatla S, Galimova GR, Azyazov VN, Mebel AM, Kaiser RI. Gas-Phase Formation of C 5H 6 Isomers via the Crossed Molecular Beam Reaction of the Methylidyne Radical (CH; X 2Π) with 1,2-Butadiene (CH 3CHCCH 2; X 1A'). J Phys Chem A 2021; 125:126-138. [PMID: 33397109 DOI: 10.1021/acs.jpca.0c08731] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The bimolecular gas-phase reaction of the methylidyne radical (CH; X2Π) with 1,2-butadiene (CH2CCHCH3; X1A') was investigated at a collision energy of 20.6 kJ mol-1 under single collision conditions. Combining our laboratory data with high-level electronic structure calculations, we reveal that this bimolecular reaction proceeds through the barrierless addition of the methylidyne radical to the carbon-carbon double bonds of 1,2-butadiene leading to doublet C5H7 intermediates. These collision adducts undergo a nonstatistical unimolecular decomposition through atomic hydrogen elimination to at least the cyclic 1-vinyl-cyclopropene (p5/p26), 1-methyl-3-methylenecyclopropene (p28), and 1,2-bis(methylene)cyclopropane (p29) in overall exoergic reactions. The barrierless nature of this bimolecular reaction suggests that these cyclic C5H6 isomers might be viable targets to be searched for in cold molecular clouds like TMC-1.
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Affiliation(s)
- Chao He
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, United States
| | | | - Long Zhao
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, United States
| | - Aaron M Thomas
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, United States
| | - Srinivas Doddipatla
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, United States
| | - Galiya R Galimova
- Samara National Research University, Samara 443086, Russian Federation.,Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, United States
| | - Valeriy N Azyazov
- Samara National Research University, Samara 443086, Russian Federation.,Lebedev Physical Institute, Samara 443011, Russian Federation
| | - Alexander M Mebel
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, United States
| | - Ralf I Kaiser
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, United States
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5
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Baroncelli M, Mao Q, Galle S, Hansen N, Pitsch H. Role of ring-enlargement reactions in the formation of aromatic hydrocarbons. Phys Chem Chem Phys 2020; 22:4699-4714. [DOI: 10.1039/c9cp05854k] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ring-enlargement reactions can provide a fast route towards the formation of six-membered single-ring or polycyclic aromatic hydrocarbons (PAHs).
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Affiliation(s)
- Martina Baroncelli
- Institute for Combustion Technology
- RWTH Aachen University
- 52062 Aachen
- Germany
| | - Qian Mao
- Institute for Combustion Technology
- RWTH Aachen University
- 52062 Aachen
- Germany
| | - Simon Galle
- Institute for Combustion Technology
- RWTH Aachen University
- 52062 Aachen
- Germany
| | - Nils Hansen
- Combustion Research Facility, Sandia National Laboratories
- Livermore
- USA
| | - Heinz Pitsch
- Institute for Combustion Technology
- RWTH Aachen University
- 52062 Aachen
- Germany
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6
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Pratali Maffei L, Pelucchi M, Faravelli T, Cavallotti C. Theoretical study of sensitive reactions in phenol decomposition. REACT CHEM ENG 2020. [DOI: 10.1039/c9re00418a] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of phenol is of utmost importance in combustion systems.
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Affiliation(s)
- Luna Pratali Maffei
- CRECK Modeling Lab
- Department of Chemistry, Materials, and Chemical Engineering
- Politecnico di Milano
- Italy
| | - Matteo Pelucchi
- CRECK Modeling Lab
- Department of Chemistry, Materials, and Chemical Engineering
- Politecnico di Milano
- Italy
| | - Tiziano Faravelli
- CRECK Modeling Lab
- Department of Chemistry, Materials, and Chemical Engineering
- Politecnico di Milano
- Italy
| | - Carlo Cavallotti
- CRECK Modeling Lab
- Department of Chemistry, Materials, and Chemical Engineering
- Politecnico di Milano
- Italy
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7
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He C, Zhao L, Thomas AM, Galimova GR, Mebel AM, Kaiser RI. A combined experimental and computational study on the reaction dynamics of the 1-propynyl radical (CH 3CC; X 2A 1) with ethylene (H 2CCH 2; X 1A 1g) and the formation of 1-penten-3-yne (CH 2CHCCCH 3; X 1A'). Phys Chem Chem Phys 2019; 21:22308-22319. [PMID: 31576858 DOI: 10.1039/c9cp04073k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The crossed molecular beam reactions of the 1-propynyl radical (CH3CC; X2A1) with ethylene (H2CCH2; X1A1g) and ethylene-d4 (D2CCD2; X1A1g) were performed at collision energies of 31 kJ mol-1 under single collision conditions. Combining our laboratory data with ab initio electronic structure and statistical Rice-Ramsperger-Kassel-Marcus (RRKM) calculations, we reveal that the reaction is initiated by the barrierless addition of the 1-propynyl radical to the π-electron density of the unsaturated hydrocarbon of ethylene leading to a doublet C5H7 intermediate(s) with a life time(s) longer than the rotation period(s). The reaction eventually produces 1-penten-3-yne (p1) plus a hydrogen atom with an overall reaction exoergicity of 111 ± 16 kJ mol-1. About 35% of p1 originates from the initial collision complex followed by C-H bond rupture via a tight exit transition state located 22 kJ mol-1 above the separated products. The collision complex (i1) can also undergo a [1,2] hydrogen atom shift to the CH3CHCCCH3 intermediate (i2) prior to a hydrogen atom release; RRKM calculations suggest that this pathway contributes to about 65% of p1. In higher density environments such as in combustion flames and circumstellar envelopes of carbon stars close to the central star, 1-penten-3-yne (p1) may eventually form the cyclopentadiene (c-C5H6) isomer via hydrogen atom assisted isomerization followed by hydrogen abstraction to the cyclopentadienyl radical (c-C5H5) as an important pathway to key precursors to polycyclic aromatic hydrocarbons (PAHs) and to carbonaceous nanoparticles.
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Affiliation(s)
- Chao He
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA.
| | - Long Zhao
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA.
| | - Aaron M Thomas
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA.
| | - Galiya R Galimova
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, USA. and Samara National Research University, Samara 443086, Russia
| | - Alexander M Mebel
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, USA. and Samara National Research University, Samara 443086, Russia
| | - Ralf I Kaiser
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA.
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8
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Jin H, Yang J, Xing L, Hao J, Zhang Y, Cao C, Pan Y, Farooq A. An experimental study of indene pyrolysis with synchrotron vacuum ultraviolet photoionization mass spectrometry. Phys Chem Chem Phys 2019; 21:5510-5520. [PMID: 30785151 DOI: 10.1039/c8cp07285j] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Pyrolytic kinetics of indene was studied in a flow reactor at 30 and 760 Torr. Indene and its decomposition products, as well as polycyclic aromatic hydrocarbons (PAHs), were measured with synchrotron vacuum ultraviolet photoionization mass spectrometry (SVUV-PIMS). Five literature models were selected to reproduce the experimental data and analyze the reaction kinetics of indene. The experimental and predicted results illustrate that an indenyl radical is the dominant decomposition intermediate and also the main contributor to the further growth of aromatic rings in the pyrolysis of indene. The indene consumption process needs further precise characterization, especially the subsequent dissociation reactions of indanyl and indenyl radicals. A self-recombination reaction of the indenyl radical and the combination reactions between indenyl and other radicals are found to be necessary for the efficient formation of large PAHs. The absence of these pathways leads to the underprediction of experimental measurements. In contrast, literature models adopting indenyl global reactions for PAH formation generally overestimate the system reactivity. Proper radical combination pathways proposed in a future model should consider not only the PAH formation efficiency but also its impact on system reactivity.
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Affiliation(s)
- Hanfeng Jin
- Clean Combustion Research Centre, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
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9
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Van Geem K. Kinetic modeling of the pyrolysis chemistry of fossil and alternative feedstocks. COMPUTER AIDED CHEMICAL ENGINEERING 2019. [DOI: 10.1016/b978-0-444-64087-1.00006-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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10
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Ruwe L, Moshammer K, Hansen N, Kohse-Höinghaus K. Influences of the molecular fuel structure on combustion reactions towards soot precursors in selected alkane and alkene flames. Phys Chem Chem Phys 2018; 20:10780-10795. [PMID: 29392266 DOI: 10.1039/c7cp07743b] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In this study, we experimentally investigate the high-temperature oxidation kinetics of n-pentane, 1-pentene and 2-methyl-2-butene (2M2B) in a combustion environment using flame-sampling molecular beam mass spectrometry. The selected C5 fuels are prototypes for linear and branched, saturated and unsaturated fuel components, featuring different C-C and C-H bond structures. It is shown that the formation tendency of species, such as polycyclic aromatic hydrocarbons (PAHs), yielded through mass growth reactions increases drastically in the sequence n-pentane < 1-pentene < 2M2B. This comparative study enables valuable insights into fuel-dependent reaction sequences of the gas-phase combustion mechanism that provide explanations for the observed difference in the PAH formation tendency. First, we investigate the fuel-structure-dependent formation of small hydrocarbon species that are yielded as intermediate species during the fuel decomposition, because these species are at the origin of the subsequent mass growth reaction pathways. Second, we review typical PAH formation reactions inspecting repetitive growth sequences in dependence of the molecular fuel structure. Third, we discuss how differences in the intermediate species pool influence the formation reactions of key aromatic ring species that are important for the PAH growth process underlying soot formation. As a main result it was found that for the fuels featuring a C[double bond, length as m-dash]C double bond, the chemistry of their allylic fuel radicals and their decomposition products strongly influences the combination reactions to the initially formed aromatic ring species and as a consequence, the PAH formation tendency.
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Affiliation(s)
- Lena Ruwe
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany.
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11
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Shapero M, Ramphal IA, Neumark DM. Photodissociation of the Cyclopentadienyl Radical at 248 nm. J Phys Chem A 2018; 122:4265-4272. [DOI: 10.1021/acs.jpca.7b11837] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mark Shapero
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Isaac A. Ramphal
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Daniel M. Neumark
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
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12
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Li TY, Zou JB, Zhang Y, Cao CC, Li W, Yuan WH. Numerical Investigation on 1,3-Butadiene/Propyne Co-pyrolysis and Insight into Synergistic Effect on Aromatic Hydrocarbon Formation. CHINESE J CHEM PHYS 2017. [DOI: 10.1063/1674-0068/30/cjcp1703031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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13
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Mebel AM, Landera A, Kaiser RI. Formation Mechanisms of Naphthalene and Indene: From the Interstellar Medium to Combustion Flames. J Phys Chem A 2017; 121:901-926. [DOI: 10.1021/acs.jpca.6b09735] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alexander M. Mebel
- Department
of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, United States
| | - Alexander Landera
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Ralf I. Kaiser
- Department
of Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
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14
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Gimondi I, Cavallotti C, Vanuzzo G, Balucani N, Casavecchia P. Reaction Dynamics of O(3P) + Propyne: II. Primary Products, Branching Ratios, and Role of Intersystem Crossing from Ab Initio Coupled Triplet/Singlet Potential Energy Surfaces and Statistical Calculations. J Phys Chem A 2016; 120:4619-33. [DOI: 10.1021/acs.jpca.6b01564] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ilaria Gimondi
- Politecnico
di Milano, Dipartimento
di Chimica, Materiali e Ingegneria Chimica “Giulio Natta”, 20131 Milano, Italy
| | - Carlo Cavallotti
- Politecnico
di Milano, Dipartimento
di Chimica, Materiali e Ingegneria Chimica “Giulio Natta”, 20131 Milano, Italy
| | - Gianmarco Vanuzzo
- Dipartimento di Chimica,
Biologia e Biotecnologie, Università degli Studi di Perugia, 06123 Perugia, Italy
| | - Nadia Balucani
- Dipartimento di Chimica,
Biologia e Biotecnologie, Università degli Studi di Perugia, 06123 Perugia, Italy
| | - Piergiorgio Casavecchia
- Dipartimento di Chimica,
Biologia e Biotecnologie, Università degli Studi di Perugia, 06123 Perugia, Italy
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15
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Wang K, Villano SM, Dean AM. Ab initio study of the influence of resonance stabilization on intramolecular ring closure reactions of hydrocarbon radicals. Phys Chem Chem Phys 2016; 18:8437-52. [DOI: 10.1039/c5cp06994g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cyclization reactions of dieneyl radicals provide a low energy route to the formation of molecular weight growth products.
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Affiliation(s)
- Kun Wang
- Chemical and Biological Engineering Dept
- Colorado School of Mines
- Golden
- USA
| | | | - Anthony M. Dean
- Chemical and Biological Engineering Dept
- Colorado School of Mines
- Golden
- USA
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16
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Reyniers PA, Schietekat CM, Van Cauwenberge DJ, Vandewalle LA, Van Geem KM, Marin GB. Necessity and Feasibility of 3D Simulations of Steam Cracking Reactors. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b02477] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pieter A. Reyniers
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
| | - Carl M. Schietekat
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
| | | | - Laurien A. Vandewalle
- 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
| | - Guy B. Marin
- Ghent University, Laboratory for Chemical Technology, Technologiepark 914, 9052 Gent, Belgium
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17
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De Bruycker R, Pyl SP, Reyniers MF, Van Geem KM, Marin GB. Microkinetic model for the pyrolysis of methyl esters: From model compound to industrial biodiesel. AIChE J 2015. [DOI: 10.1002/aic.14953] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ruben De Bruycker
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 9052 Gent Belgium
| | - Steven P. Pyl
- 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
| | - Guy B. Marin
- Laboratory for Chemical Technology; Ghent University; Technologiepark 914 9052 Gent Belgium
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18
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Wentrup C, Becker J, Diehl M. C15H10 and C15H12 Thermal Chemistry: Phenanthrylcarbene Isomers and Phenylindenes by Falling Solid Flash Vacuum Pyrolysis of Tetrazoles. J Org Chem 2015; 80:7144-9. [DOI: 10.1021/acs.joc.5b01007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Curt Wentrup
- Fachbereich Chemie der Philipps-Universität Marburg, D-35037 Marburg, Germany
- School
of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Qld 4072, Australia
| | - Jürgen Becker
- Fachbereich Chemie der Philipps-Universität Marburg, D-35037 Marburg, Germany
| | - Manfred Diehl
- Fachbereich Chemie der Philipps-Universität Marburg, D-35037 Marburg, Germany
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Bouwman J, Bodi A, Oomens J, Hemberger P. On the formation of cyclopentadiene in the C3H5˙ + C2H2 reaction. Phys Chem Chem Phys 2015; 17:20508-14. [PMID: 26086435 DOI: 10.1039/c5cp02243f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction between the allyl radical (C3H5˙) and acetylene (C2H2) in a heated microtubular reactor has been studied at the VUV beamline of the Swiss Light Source. The reaction products are sampled from the reactor and identified by their photoion mass-selected threshold photoelectron spectra (ms-TPES) by means of imaging photoelectron photoion coincidence spectroscopy. Cyclopentadiene is identified as the sole reaction product by comparison of the measured photoelectron spectrum with that of cyclopentadiene. With the help of quantum-chemical computations of the C5H7 potential energy surface, the C2H2 + C3H5˙ association reaction is confirmed to be the rate determining step, after which H-elimination to form C5H6 is prompt in the absence of re-thermalization at low pressures. The formation of cyclopentadiene as the sole product from the allyl + acetylene reaction offers a direct path to the formation of cyclic hydrocarbons under combustion relevant conditions. Subsequent reactions of cyclopentadiene may lead to the formation of the smallest polycyclic aromatic molecule, naphthalene.
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Affiliation(s)
- Jordy Bouwman
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, NL-6525 ED Nijmegen, The Netherlands.
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20
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Wentrup C, Winter HW, Kvaskoff D. C9H8 Pyrolysis. o-Tolylacetylene, Indene, 1-Indenyl, and Biindenyls and the Mechanism of Indene Pyrolysis. J Phys Chem A 2015; 119:6370-6. [DOI: 10.1021/acs.jpca.5b03453] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Curt Wentrup
- Fachbereich
Chemie der Philipps-Universität Marburg, D-35037 Marburg, Germany
- School
of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Hans-Wilhelm Winter
- Fachbereich
Chemie der Philipps-Universität Marburg, D-35037 Marburg, Germany
| | - David Kvaskoff
- School
of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
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21
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Knyazev VD, Popov KV. Kinetics of the Self Reaction of Cyclopentadienyl Radicals. J Phys Chem A 2015; 119:7418-29. [DOI: 10.1021/acs.jpca.5b00644] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vadim D. Knyazev
- Research Center for Chemical
Kinetics, Department of Chemistry, The Catholic University of America, Washington, District of Columbia 20064, United States
| | - Konstantin V. Popov
- Research Center for Chemical
Kinetics, Department of Chemistry, The Catholic University of America, Washington, District of Columbia 20064, United States
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22
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Polino D, Parrinello M. Combustion Chemistry via Metadynamics: Benzyl Decomposition Revisited. J Phys Chem A 2015; 119:978-89. [DOI: 10.1021/jp5118807] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniela Polino
- Department of Chemistry and
Applied Biosciences, ETH Zurich and Facoltà di Informatica,
Istituto di Scienze Computazionali, Università della Svizzera Italiana, Via G. Buffi 13, 6900 Lugano Switzerland
| | - Michele Parrinello
- Department of Chemistry and
Applied Biosciences, ETH Zurich and Facoltà di Informatica,
Istituto di Scienze Computazionali, Università della Svizzera Italiana, Via G. Buffi 13, 6900 Lugano Switzerland
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23
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De Bruycker R, Anthonykutty JM, Linnekoski J, Harlin A, Lehtonen J, Van Geem KM, Räsänen J, Marin GB. Assessing the Potential of Crude Tall Oil for the Production of Green-Base Chemicals: An Experimental and Kinetic Modeling Study. Ind Eng Chem Res 2014. [DOI: 10.1021/ie503505f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ruben De Bruycker
- Laboratory for
Chemical Technology, Ghent University, 9000 Gent, Belgium
| | | | - Juha Linnekoski
- VTT Technical Research Center of Finland, FI-02044 Espoo, Finland
| | - Ali Harlin
- VTT Technical Research Center of Finland, FI-02044 Espoo, Finland
| | - Juha Lehtonen
- Department
of Biotechnology and Chemical Technology, Aalto University, PO Box 16100, FI-00076 Aalto, Finland
| | - Kevin M. Van Geem
- Laboratory for
Chemical Technology, Ghent University, 9000 Gent, Belgium
| | - Jari Räsänen
- Stora Enso Renewable Packaging, Imatra Mills, FI-55800 Imatra, Finland
| | - Guy B. Marin
- Laboratory for
Chemical Technology, Ghent University, 9000 Gent, Belgium
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24
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Ledesma EB, Hoang JN, Solon AJ, Tran MMH, Nguyen MP, Nguyen HD, Hendrix-Doucette T, Vu JV, Fortune CK, Batamo S. Vapor-Phase Cracking of 4-Vinylguaiacol in a Laminar-Flow Reactor: Kinetics and Effect of Temperature on Product Composition. Ind Eng Chem Res 2014. [DOI: 10.1021/ie502002t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Elmer B. Ledesma
- Department
of Chemistry and Physics, University of St. Thomas, Houston, Texas 77006, United States
| | - Jennifer N. Hoang
- Department
of Chemistry and Physics, University of St. Thomas, Houston, Texas 77006, United States
| | - Adam J. Solon
- Houston Community College, Central Campus, Houston, Texas 77004, United States
| | - Marianne M. H. Tran
- Department
of Chemistry and Physics, University of St. Thomas, Houston, Texas 77006, United States
| | - Mitchell P. Nguyen
- Department
of Chemistry and Physics, University of St. Thomas, Houston, Texas 77006, United States
| | - Hien D. Nguyen
- Department
of Chemistry and Physics, University of St. Thomas, Houston, Texas 77006, United States
| | | | - Jacqueline V. Vu
- Department
of Chemistry and Physics, University of St. Thomas, Houston, Texas 77006, United States
| | - Carla K. Fortune
- Houston Community College, Central Campus, Houston, Texas 77004, United States
| | - Shuhsien Batamo
- Houston Community College, Central Campus, Houston, Texas 77004, United States
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25
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Karaba A, Zamostny P, Lederer J, Belohlav Z. Generalized Model of Hydrocarbons Pyrolysis Using Automated Reactions Network Generation. Ind Eng Chem Res 2013. [DOI: 10.1021/ie4006657] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adam Karaba
- Faculty of Chemical Technology, Department of Organic Technology, Institute of Chemical Technology Prague, Technicka
5, 116 28 Prague, Czech Republic
- Research Institute of Inorganic Chemistry, Revolucni 1521/84, 400 01 Usti nad Labem, Czech Republic
| | - Petr Zamostny
- Faculty of Chemical Technology, Department of Organic Technology, Institute of Chemical Technology Prague, Technicka
5, 116 28 Prague, Czech Republic
| | - Jaromir Lederer
- Research Institute of Inorganic Chemistry, Revolucni 1521/84, 400 01 Usti nad Labem, Czech Republic
| | - Zdenek Belohlav
- Faculty of Chemical Technology, Department of Organic Technology, Institute of Chemical Technology Prague, Technicka
5, 116 28 Prague, Czech Republic
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Cuccato D, Dossi M, Moscatelli D, Storti G. Quantum Chemical Investigation of Secondary Reactions in Poly(vinyl chloride) Free-Radical Polymerization. MACROMOL REACT ENG 2012. [DOI: 10.1002/mren.201200010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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