Syngas Production from CH4 Dry Reforming Over Coeni/Al2O3 Catalyst: Coupled Reaction-Deactivation Kinetic Analysis and the Effect of O2 Co-Feeding on H2:CO Ratio
The dry and oxidative dry reforming of CH4 over alumina-supported CoeNi catalysts were investigated over 72-h longevity experiments. The deactivation behaviour at low CO2:CH4 ratio (2) suggests that carbon deposition proceeds via a rapid dehydropolymerisation step resulting in the blockage of activ...
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Elsevier
2012
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ump-6788 |
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eprints |
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ump-67882018-01-11T03:52:21Z http://umpir.ump.edu.my/id/eprint/6788/ Syngas Production from CH4 Dry Reforming Over Coeni/Al2O3 Catalyst: Coupled Reaction-Deactivation Kinetic Analysis and the Effect of O2 Co-Feeding on H2:CO Ratio Foo, Say Yei Cheng, C. K. Nguyen, Tuan-Huy Adesina, Adesoji A. QD Chemistry The dry and oxidative dry reforming of CH4 over alumina-supported CoeNi catalysts were investigated over 72-h longevity experiments. The deactivation behaviour at low CO2:CH4 ratio (2) suggests that carbon deposition proceeds via a rapid dehydropolymerisation step resulting in the blockage of active sites and loss in CO2 consumption. In particular, at high temperatures of 923 K and 973 K, a ‘breakthrough’ point was observed in which deactivation that was previously slow suddenly accelerated, indicating rapid polymerisation of deposited carbon. Only with feed CO2:CH4 > 2 or with O2 co-feeding was coke-induced deactivation eliminated. In particular, O2 co-feeding gave improved carbon removal, product H2:CO ratios more suitable for downstream GTL processing and stable catalytic performance. Conversion-time data were adequately fitted to the generalised Levenspiel reaction-deactivation model. Activation energy estimate (66e129 kJ mol1) was dependent on the CO2:CH4 ratio but representative of other hydrocarbon reforming reactions on Nibased catalysts. Elsevier 2012 Article PeerReviewed Foo, Say Yei and Cheng, C. K. and Nguyen, Tuan-Huy and Adesina, Adesoji A. (2012) Syngas Production from CH4 Dry Reforming Over Coeni/Al2O3 Catalyst: Coupled Reaction-Deactivation Kinetic Analysis and the Effect of O2 Co-Feeding on H2:CO Ratio. International Journal of Hydrogen Energy, 37 (22). 17019 -17026. ISSN 0360-3199 http://dx.doi.org/10.1016/j.ijhydene.2012.08.136 doi: 10.1016/j.ijhydene.2012.08.136 |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
Universiti Malaysia Pahang |
| building |
UMP Institutional Repository |
| collection |
Online Access |
| topic |
QD Chemistry |
| spellingShingle |
QD Chemistry Foo, Say Yei Cheng, C. K. Nguyen, Tuan-Huy Adesina, Adesoji A. Syngas Production from CH4 Dry Reforming Over Coeni/Al2O3 Catalyst: Coupled Reaction-Deactivation Kinetic Analysis and the Effect of O2 Co-Feeding on H2:CO Ratio |
| description |
The dry and oxidative dry reforming of CH4 over alumina-supported CoeNi catalysts were investigated over 72-h longevity experiments. The deactivation behaviour at low CO2:CH4 ratio (2) suggests that carbon deposition proceeds via a rapid dehydropolymerisation step
resulting in the blockage of active sites and loss in CO2 consumption. In particular, at high temperatures of 923 K and 973 K, a ‘breakthrough’ point was observed in which deactivation that was previously slow suddenly accelerated, indicating rapid polymerisation of
deposited carbon. Only with feed CO2:CH4 > 2 or with O2 co-feeding was coke-induced deactivation eliminated. In particular, O2 co-feeding gave improved carbon removal,
product H2:CO ratios more suitable for downstream GTL processing and stable catalytic performance. Conversion-time data were adequately fitted to the generalised Levenspiel reaction-deactivation model. Activation energy estimate (66e129 kJ mol1) was dependent on the CO2:CH4 ratio but representative of other hydrocarbon reforming reactions on Nibased catalysts. |
| format |
Article |
| author |
Foo, Say Yei Cheng, C. K. Nguyen, Tuan-Huy Adesina, Adesoji A. |
| author_facet |
Foo, Say Yei Cheng, C. K. Nguyen, Tuan-Huy Adesina, Adesoji A. |
| author_sort |
Foo, Say Yei |
| title |
Syngas Production from CH4 Dry Reforming Over Coeni/Al2O3 Catalyst: Coupled Reaction-Deactivation Kinetic Analysis and the Effect of O2 Co-Feeding on H2:CO Ratio |
| title_short |
Syngas Production from CH4 Dry Reforming Over Coeni/Al2O3 Catalyst: Coupled Reaction-Deactivation Kinetic Analysis and the Effect of O2 Co-Feeding on H2:CO Ratio |
| title_full |
Syngas Production from CH4 Dry Reforming Over Coeni/Al2O3 Catalyst: Coupled Reaction-Deactivation Kinetic Analysis and the Effect of O2 Co-Feeding on H2:CO Ratio |
| title_fullStr |
Syngas Production from CH4 Dry Reforming Over Coeni/Al2O3 Catalyst: Coupled Reaction-Deactivation Kinetic Analysis and the Effect of O2 Co-Feeding on H2:CO Ratio |
| title_full_unstemmed |
Syngas Production from CH4 Dry Reforming Over Coeni/Al2O3 Catalyst: Coupled Reaction-Deactivation Kinetic Analysis and the Effect of O2 Co-Feeding on H2:CO Ratio |
| title_sort |
syngas production from ch4 dry reforming over coeni/al2o3 catalyst: coupled reaction-deactivation kinetic analysis and the effect of o2 co-feeding on h2:co ratio |
| publisher |
Elsevier |
| publishDate |
2012 |
| url |
http://umpir.ump.edu.my/id/eprint/6788/ http://umpir.ump.edu.my/id/eprint/6788/ http://umpir.ump.edu.my/id/eprint/6788/ |
| first_indexed |
2023-09-18T22:02:52Z |
| last_indexed |
2023-09-18T22:02:52Z |
| _version_ |
1777414514866651136 |