Detailed Experimental and Kinetic Modeling Study of Cyclopentadiene Pyrolysis in the Presence of Ethene
Abstract
A combined experimental and kinetic modeling study is presented to improve the understanding of the formation of polycyclic aromatic hydrocarbons at pyrolysis conditions. The copyrolysis of cyclopentadiene (CPD) and ethene was studied in a continuous flow tubular reactor at a pressure of 0.17 MPa and a dilution of 1 mol CPD/1 mol ethene/10 mol N2. The temperature was varied from 873 to 1163 K, resulting in cyclopentadiene conversions between 1 and 92%. Using an automated reaction network generator, RMG, we present an elementary step kinetic model for CPD pyrolysis that accurately predicts the initial formation of aromatic products. The model is able to reproduce the product yields measured during the pyrolysis of pure cyclopentadiene and the copyrolysis of cyclopentadiene and ethene. The addition of ethene as coreactant increases the benzene and toluene selectivity. In the absence of ethene, benzene formation is initiated by addition of a cyclopentadienyl radical to cyclopentadiene, following a complicated series of isomerizations and loss of a butadienyl radical. In the presence of ethene, the main pathway for the formation of benzene + CH3 shifts to ethene + cyclopentadiene. Toluene formation is initiated by vinyl radical addition to cyclopentadiene. Without the addition of ethene, vinyl radicals aremore »
- Authors:
-
- Ghent Univ., Gent (Belgium)
- ExxonMobil Research and Engineering, Annandale, NJ (United States)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Combustion Energy Frontier Research Center (CEFRC); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1480083
- Grant/Contract Number:
- SC0001198; SC0014901; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Energy and Fuels
- Additional Journal Information:
- Journal Volume: 32; Journal Issue: 3; Journal ID: ISSN 0887-0624
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Vervust, Alexander J., Djokic, Marko R., Merchant, Shamel S., Carstensen, Hans-Heinrich, Long, Alan E., Marin, Guy B., Green, William H., and Van Geem, Kevin M. Detailed Experimental and Kinetic Modeling Study of Cyclopentadiene Pyrolysis in the Presence of Ethene. United States: N. p., 2018.
Web. doi:10.1021/acs.energyfuels.7b03560.
Vervust, Alexander J., Djokic, Marko R., Merchant, Shamel S., Carstensen, Hans-Heinrich, Long, Alan E., Marin, Guy B., Green, William H., & Van Geem, Kevin M. Detailed Experimental and Kinetic Modeling Study of Cyclopentadiene Pyrolysis in the Presence of Ethene. United States. https://doi.org/10.1021/acs.energyfuels.7b03560
Vervust, Alexander J., Djokic, Marko R., Merchant, Shamel S., Carstensen, Hans-Heinrich, Long, Alan E., Marin, Guy B., Green, William H., and Van Geem, Kevin M. Wed .
"Detailed Experimental and Kinetic Modeling Study of Cyclopentadiene Pyrolysis in the Presence of Ethene". United States. https://doi.org/10.1021/acs.energyfuels.7b03560. https://www.osti.gov/servlets/purl/1480083.
@article{osti_1480083,
title = {Detailed Experimental and Kinetic Modeling Study of Cyclopentadiene Pyrolysis in the Presence of Ethene},
author = {Vervust, Alexander J. and Djokic, Marko R. and Merchant, Shamel S. and Carstensen, Hans-Heinrich and Long, Alan E. and Marin, Guy B. and Green, William H. and Van Geem, Kevin M.},
abstractNote = {A combined experimental and kinetic modeling study is presented to improve the understanding of the formation of polycyclic aromatic hydrocarbons at pyrolysis conditions. The copyrolysis of cyclopentadiene (CPD) and ethene was studied in a continuous flow tubular reactor at a pressure of 0.17 MPa and a dilution of 1 mol CPD/1 mol ethene/10 mol N2. The temperature was varied from 873 to 1163 K, resulting in cyclopentadiene conversions between 1 and 92%. Using an automated reaction network generator, RMG, we present an elementary step kinetic model for CPD pyrolysis that accurately predicts the initial formation of aromatic products. The model is able to reproduce the product yields measured during the pyrolysis of pure cyclopentadiene and the copyrolysis of cyclopentadiene and ethene. The addition of ethene as coreactant increases the benzene and toluene selectivity. In the absence of ethene, benzene formation is initiated by addition of a cyclopentadienyl radical to cyclopentadiene, following a complicated series of isomerizations and loss of a butadienyl radical. In the presence of ethene, the main pathway for the formation of benzene + CH3 shifts to ethene + cyclopentadiene. Toluene formation is initiated by vinyl radical addition to cyclopentadiene. Without the addition of ethene, vinyl radicals are mainly formed by hydrogen radical addition to ethyne. As a result, when ethene is added as coreactant, vinyl radical production happens via hydrogen abstraction from ethene.},
doi = {10.1021/acs.energyfuels.7b03560},
journal = {Energy and Fuels},
number = 3,
volume = 32,
place = {United States},
year = {Wed Feb 07 00:00:00 EST 2018},
month = {Wed Feb 07 00:00:00 EST 2018}
}
Web of Science
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