Development of a kinetic model for CO2 methanation over a commercial Ni/SiO 2 catalyst in a differential reactor
Development of a kinetic model for CO2 methanation over a commercial nickel catalyst was performed to consider pathways of CO2 conversion via Sabatier and RWGS reactions. H2/CO2 ratio in the feed gas composition was varied at the stoichiometry of the Sabatier reaction assuming a fictitious CO2 conve...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Energy Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484722021308 |
| _version_ | 1811159667214123008 |
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| author | Angkana Khuenpetch Cheolyong Choi Prasert Reubroycharoen Koyo Norinaga |
| author_facet | Angkana Khuenpetch Cheolyong Choi Prasert Reubroycharoen Koyo Norinaga |
| author_sort | Angkana Khuenpetch |
| collection | DOAJ |
| description | Development of a kinetic model for CO2 methanation over a commercial nickel catalyst was performed to consider pathways of CO2 conversion via Sabatier and RWGS reactions. H2/CO2 ratio in the feed gas composition was varied at the stoichiometry of the Sabatier reaction assuming a fictitious CO2 conversion of 0 to 0.7. Non-stochiometric gas feeding and the addition of product gases, i.e., methane and steam, were also considered to examine reaction orders and inhibition effects. The kinetic tests were carried out at 300–350 °C and 0.1–0.9 MPa. GHSV corresponded to 37,494 h−1. The stable activity was achieved by forcibly stressing the catalyst under the equilibria at 500 °C for 35 h. The kinetic measurements were conducted at an isothermal differential fixed bed reactor in the absence of heat and mass transport limitations. The methanation reaction was first fitted with the power law and LH approaches by considering the Sabatier reaction. Then, the RWGS reaction was added to consider CO formation using the power law models. The results showed a better fitting of experimental observations by using the LH expression with the formation of formyl as RDS and the power law model with inhibiting influence of water. |
| first_indexed | 2024-04-10T05:45:03Z |
| format | Article |
| id | doaj.art-26b16f55933d4c61bb244b476fadb13b |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-04-10T05:45:03Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-26b16f55933d4c61bb244b476fadb13b2023-03-06T04:13:06ZengElsevierEnergy Reports2352-48472022-12-018224233Development of a kinetic model for CO2 methanation over a commercial Ni/SiO 2 catalyst in a differential reactorAngkana Khuenpetch0Cheolyong Choi1Prasert Reubroycharoen2Koyo Norinaga3Center of Excellence in Catalysis for Bioenergy and Renewable Chemicals (CBRC) and Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand; Department of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Chikusaku, Nagoya, Aichi 464-8603, JapanDepartment of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Chikusaku, Nagoya, Aichi 464-8603, JapanCenter of Excellence in Catalysis for Bioenergy and Renewable Chemicals (CBRC) and Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand; Corresponding authors.Department of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Chikusaku, Nagoya, Aichi 464-8603, Japan; Corresponding authors.Development of a kinetic model for CO2 methanation over a commercial nickel catalyst was performed to consider pathways of CO2 conversion via Sabatier and RWGS reactions. H2/CO2 ratio in the feed gas composition was varied at the stoichiometry of the Sabatier reaction assuming a fictitious CO2 conversion of 0 to 0.7. Non-stochiometric gas feeding and the addition of product gases, i.e., methane and steam, were also considered to examine reaction orders and inhibition effects. The kinetic tests were carried out at 300–350 °C and 0.1–0.9 MPa. GHSV corresponded to 37,494 h−1. The stable activity was achieved by forcibly stressing the catalyst under the equilibria at 500 °C for 35 h. The kinetic measurements were conducted at an isothermal differential fixed bed reactor in the absence of heat and mass transport limitations. The methanation reaction was first fitted with the power law and LH approaches by considering the Sabatier reaction. Then, the RWGS reaction was added to consider CO formation using the power law models. The results showed a better fitting of experimental observations by using the LH expression with the formation of formyl as RDS and the power law model with inhibiting influence of water.http://www.sciencedirect.com/science/article/pii/S2352484722021308CO2 methanationKineticsCO2 hydrogenationCO2 to methanePower-to-gasNi/SiO2 |
| spellingShingle | Angkana Khuenpetch Cheolyong Choi Prasert Reubroycharoen Koyo Norinaga Development of a kinetic model for CO2 methanation over a commercial Ni/SiO 2 catalyst in a differential reactor Energy Reports CO2 methanation Kinetics CO2 hydrogenation CO2 to methane Power-to-gas Ni/SiO2 |
| title | Development of a kinetic model for CO2 methanation over a commercial Ni/SiO 2 catalyst in a differential reactor |
| title_full | Development of a kinetic model for CO2 methanation over a commercial Ni/SiO 2 catalyst in a differential reactor |
| title_fullStr | Development of a kinetic model for CO2 methanation over a commercial Ni/SiO 2 catalyst in a differential reactor |
| title_full_unstemmed | Development of a kinetic model for CO2 methanation over a commercial Ni/SiO 2 catalyst in a differential reactor |
| title_short | Development of a kinetic model for CO2 methanation over a commercial Ni/SiO 2 catalyst in a differential reactor |
| title_sort | development of a kinetic model for co2 methanation over a commercial ni sio 2 catalyst in a differential reactor |
| topic | CO2 methanation Kinetics CO2 hydrogenation CO2 to methane Power-to-gas Ni/SiO2 |
| url | http://www.sciencedirect.com/science/article/pii/S2352484722021308 |
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