relation: https://khub.utp.edu.my/scholars/10026/ title: Bi-reforming of methane on Ni/SBA-15 catalyst for syngas production: Influence of feed composition creator: Singh, S. creator: Bahari, M.B. creator: Abdullah, B. creator: Phuong, P.T.T. creator: Truong, Q.D. creator: Vo, D.-V.N. creator: Adesina, A.A. description: Bi-reforming of methane (BRM) was evaluated for Ni catalyst dispersed on SBA-15 support prepared by hydrothermal technique. BRM reactions were conducted under atmospheric condition with varying reactant partial pressure in the range of 10�45 kPa and 1073 K in fixed-bed reactor. The ordered hexagonal mesoporous SBA-15 support possessing large specific surface area of 669.5 m2 g�1 was well preserved with NiO addition during incipient wetness impregnation. Additionally, NiO species with mean crystallite dimension of 14.5 nm were randomly distributed over SBA-15 support surface and inside its mesoporous channels. Thus, these particles were reduced at various temperatures depending on different degrees of metal-support interaction. At stoichiometric condition and 1073 K, CH4 and CO2 conversions were about 61.6 and 58.9, respectively whilst H2/CO ratio of 2.14 slightly superior to theoretical value for BRM would suggest the predominance of methane steam reforming. H2 and CO yields were significantly enhanced with increasing CO2/(CH4 + H2O) ratio due to growing CO2 gasification rate of partially dehydrogenated species from CH4 decomposition. Additionally, a considerable decline of H2 to CO ratio from 2.14 to 1.83 was detected with reducing H2O/(CH4 + CO2) ratio due to dominant reverse water-gas shift side reaction at H2O-deficient feedstock. Interestingly, 10Ni/SBA-15 catalyst was resistant to graphitic carbon formation in the co-occurrence of H2O and CO2 oxidizing agents and the mesoporous catalyst structure was still maintained after BRM. A strong correlation between formation of carbonaceous species and catalytic activity was observed. © 2018 Hydrogen Energy Publications LLC publisher: Elsevier Ltd date: 2018 type: Article type: PeerReviewed identifier: Singh, S. and Bahari, M.B. and Abdullah, B. and Phuong, P.T.T. and Truong, Q.D. and Vo, D.-V.N. and Adesina, A.A. (2018) Bi-reforming of methane on Ni/SBA-15 catalyst for syngas production: Influence of feed composition. International Journal of Hydrogen Energy, 43 (36). pp. 17230-17243. ISSN 03603199 relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85051391747&doi=10.1016%2fj.ijhydene.2018.07.136&partnerID=40&md5=3188cf38ac6a33496bc414f00bb4bd19 relation: 10.1016/j.ijhydene.2018.07.136 identifier: 10.1016/j.ijhydene.2018.07.136