Kinetic modeling and reaction pathways for thermo-catalytic conversion of carbon dioxide and methane to hydrogen-rich syngas over alpha-alumina supported cobalt catalyst
Activation energy; Catalysis; Catalyst supports; Cobalt; Deposition; Greenhouse gases; Hydrogen production; Kinetic parameters; Kinetic theory; Methane; Surface reactions; Alpha alumina; Alumina-supported cobalt catalyst; Carbon deposition; Catalytic conversion; CH$-4$; Cobalt-alpha alumina catalyst...
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2023
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my.uniten.dspace-260312023-05-29T17:06:13Z Kinetic modeling and reaction pathways for thermo-catalytic conversion of carbon dioxide and methane to hydrogen-rich syngas over alpha-alumina supported cobalt catalyst Alsaffar M.A. Ayodele B.V. Ali J.M. Abdel Ghany M.A. Mustapa S.I. Cheng C.K. 57210601717 56862160400 57197302318 57215843327 36651549700 57204938666 Activation energy; Catalysis; Catalyst supports; Cobalt; Deposition; Greenhouse gases; Hydrogen production; Kinetic parameters; Kinetic theory; Methane; Surface reactions; Alpha alumina; Alumina-supported cobalt catalyst; Carbon deposition; Catalytic conversion; CH$-4$; Cobalt-alpha alumina catalyst; Greenhouses gas; Kinetic models; Reaction pathways; Thermo-catalytic conversion; Carbon dioxide This study investigates the kinetic modeling and reaction pathway for the thermo-catalytic conversion of methane (CH4) and Carbon dioxide (CO2) over alpha-alumina supported cobalt catalyst. Rate data was obtained from the thermo-catalytic reaction at a temperature range of 923�1023 K and varying CH4 and CO2 partial pressure (5�50 kPa). The rate data was significantly influenced by the changes in the reaction temperature as well as the CH4 and CO2 partial pressure. To estimate the kinetic parameters, the rate data were fitted with five Langmuir-Hinshelwood kinetic models. The discrimination of the kinetic models using different parameters revealed that the Langmuir-Hinshelwood kinetic model with the assumption of CH4 being associatively adsorbed on a single and CO2 being dissociative adsorbed with bimolecular surface reaction best described the rate data. The analysis of the kinetic model using a non-linear regression solver results in activation energies of 15.88 kJ/mol, 36.78 kJ/mol, 65.51 kJ/mol, and 41.08 kJ/mol for CH4 consumption, CO2 consumption, H2 production, and CO production, respectively. The thermo-catalytic reaction was influenced by carbon as indicated by the rate of carbon deposition which was mainly caused by methane cracking. The reaction pathway for the thermo-catalytic conversion of the CH4 and CO2 over the alpha-alumina supported cobalt catalyst can best be described as by CH4 associative adsorption on the alpha-alumina supported cobalt catalyst single site and CO2 dissociative adsorption with bimolecular surface reaction. � 2021 Hydrogen Energy Publications LLC Final 2023-05-29T09:06:13Z 2023-05-29T09:06:13Z 2021 Article 10.1016/j.ijhydene.2021.04.158 2-s2.0-85106392069 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85106392069&doi=10.1016%2fj.ijhydene.2021.04.158&partnerID=40&md5=5e284a5603e050691cdce0db00515167 https://irepository.uniten.edu.my/handle/123456789/26031 46 60 30871 30881 Elsevier Ltd Scopus |
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Activation energy; Catalysis; Catalyst supports; Cobalt; Deposition; Greenhouse gases; Hydrogen production; Kinetic parameters; Kinetic theory; Methane; Surface reactions; Alpha alumina; Alumina-supported cobalt catalyst; Carbon deposition; Catalytic conversion; CH$-4$; Cobalt-alpha alumina catalyst; Greenhouses gas; Kinetic models; Reaction pathways; Thermo-catalytic conversion; Carbon dioxide |
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57210601717 |
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57210601717 Alsaffar M.A. Ayodele B.V. Ali J.M. Abdel Ghany M.A. Mustapa S.I. Cheng C.K. |
| format |
Article |
| author |
Alsaffar M.A. Ayodele B.V. Ali J.M. Abdel Ghany M.A. Mustapa S.I. Cheng C.K. |
| spellingShingle |
Alsaffar M.A. Ayodele B.V. Ali J.M. Abdel Ghany M.A. Mustapa S.I. Cheng C.K. Kinetic modeling and reaction pathways for thermo-catalytic conversion of carbon dioxide and methane to hydrogen-rich syngas over alpha-alumina supported cobalt catalyst |
| author_sort |
Alsaffar M.A. |
| title |
Kinetic modeling and reaction pathways for thermo-catalytic conversion of carbon dioxide and methane to hydrogen-rich syngas over alpha-alumina supported cobalt catalyst |
| title_short |
Kinetic modeling and reaction pathways for thermo-catalytic conversion of carbon dioxide and methane to hydrogen-rich syngas over alpha-alumina supported cobalt catalyst |
| title_full |
Kinetic modeling and reaction pathways for thermo-catalytic conversion of carbon dioxide and methane to hydrogen-rich syngas over alpha-alumina supported cobalt catalyst |
| title_fullStr |
Kinetic modeling and reaction pathways for thermo-catalytic conversion of carbon dioxide and methane to hydrogen-rich syngas over alpha-alumina supported cobalt catalyst |
| title_full_unstemmed |
Kinetic modeling and reaction pathways for thermo-catalytic conversion of carbon dioxide and methane to hydrogen-rich syngas over alpha-alumina supported cobalt catalyst |
| title_sort |
kinetic modeling and reaction pathways for thermo-catalytic conversion of carbon dioxide and methane to hydrogen-rich syngas over alpha-alumina supported cobalt catalyst |
| publisher |
Elsevier Ltd |
| publishDate |
2023 |
| _version_ |
1806428367004631040 |
| score |
13.188404 |