Combined H2O and CO2 reforming of CH4 over Ce-promoted Ni/Al2O3 catalyst for gas to liquid (GTL) process: Enhancement of Ni–CeO2 interaction

• Published in: Catalysis today Vol. 185; no. 1; pp. 126 - 130
• Main Authors: Koo, Kee Young, Roh, Hyun-Seog, Jung, Un Ho, Yoon, Wang Lai
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 20.05.2012; Elsevier
• Subjects: carbon dioxide; Catalysis; catalysts; catalytic activity; Chemistry; Coke resistance; Combined steam and carbon dioxide reforming of methane; Exact sciences and technology; Gas to liquid (GTL); General and physical chemistry; methane; Ni–CeO2 intimate contact; oxygen; steam; Synthesis gas; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Gas to liquid (GTL); Ni–CeO2 intimate contact; Combined steam and carbon dioxide reforming of methane; Synthesis gas; Coke resistance; Methane; Binary compound; reforming of methane; Coke; Carbon dioxide; Reforming; Ni-Ce0; Cerium oxide; Lanthanide compound; Sequential; Storage capacity; Combined steam and carbon dioxide; intimate contact; Aluminium oxide; Oxygen; Catalytic reaction; Transition metal; Water vapor; Dispersion; Resistance; Heterogeneous catalysis; Impregnation; Liquid; Nickel; Alumina; Catalyst
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/j.cattod.2011.07.027

12wt%Ni–6wt%Ce/Al2O3 catalysts prepared by a co-impregnation method exhibited higher catalytic performance and less coke formation than 12wt%Ni/6wt%Ce/Al2O3 and 6wt%Ce/12wt%Ni/Al2O3 catalysts prepared by a sequential impregnation method due to the improvement of Ni dispersion and high oxygen storage capacity resulting from the intimate contact between Ni and CeO2 on the surface of the catalyst. [Display omitted] ► We investigate the effect of CeO2 loading method on the Ni dispersion of Ce-promoted Ni/Al2O3 catalysts. ► Ce-promoted catalysts are prepared by co-impregnation and consecutive-impregnation methods. ► Co-impregnated Ni–Ce/Al2O3 exhibits highly uniform dispersion of Ni crystallites in contrast with consecutive-impregnation. ► Co-impregnated Ni–Ce/Al2O3 shows high catalytic activity and high coke resistance in combined steam and carbon dioxide reforming. ► Co-impregnation method improves the Ni dispersion and the reducibility and strengthens the interaction between Ni and CeO2. The effect of Ni–Ce loading method on the catalytic activity and coke formation over Ce-promoted Ni/Al2O3 catalysts was investigated in combined steam and carbon dioxide reforming of methane (CSCRM) to produce synthesis gas with a H2/CO ratio of 2 for gas to liquid (GTL) process. 12wt%Ni–6wt%Ce/Al2O3 catalysts prepared by a co-impregnation method exhibited higher catalytic performance and less coke formation than 12wt%Ni/6wt%Ce/Al2O3 and 6wt%Ce/12wt%Ni/Al2O3 catalysts prepared by a sequential impregnation method due to the improvement of Ni dispersion and high oxygen storage capacity resulting from the intimate contact between Ni and CeO2 on the surface of the catalyst.