Study of Partial Oxidative Steam Reforming of Methanol over Cu–ZnO/samaria-doped Ceria Catalyst
- 160 Downloads
Partial oxidative steaming reforming of methanol (POSRM) to produce hydrogen selectively for polymer electrolyte membrane fuel cell (PEMFC) powering vehicles was studied over Cu–ZnO/samaria-doped ceria (SDC) catalyst. Compared with Cu–ZnO/α-Al2O3 and Cu–ZnO/γ-Al2O3 catalysts, the Cu–ZnO/SDC catalyst exhibited higher activity for CH3OH conversion and higher selectivity for H2 production in the POSRM reaction. The higher catalytic performance of Cu–ZnO/SDC appears attributable to the support effect of SDC. Effects of reaction temperature, O2/CH3OH and H2O/CH3OH molar ratios on the catalytic performance of Cu–ZnO/SDC were investigated. It has been found that the partial-oxidation nature of the POSRM reaction is increased when O2/CH3OH ratio is increased, and the combustion of methanol and H2 would occur insignificantly in the POSRM over the Cu–ZnO/SDC catalyst. A higher concentration of steam is beneficial to suppress CO formation over the Cu–ZnO/SDC catalyst. Under the experimental conditions of the present work, the O2/CH3OH and H2O/CH3OH molar ratios should be about 0.02 and 1.0–2.0, respectively, in order for Cu–ZnO/SDC to achieve an optimum catalytic performance.
Keywordspartial oxidative steam reforming methanol samaria-doped ceria Cu–ZnO catalyst
Unable to display preview. Download preview PDF.
- 5.T.J. Huang and C.L. Cheng, Proc. Third ROK/ROC Joint Workshop on Catalysis, Daejeon, Korea, 1985, p. 80Google Scholar
- 6.R. Kumar, S. Ahmed, M. Krumpelt and K.M. Myles, Argonne National Laboratory Report, ANL-92/31, Argonne, IL, USA, 1992Google Scholar
- 8.S. Velu, K. Suzuki and T. Osaki, Chem. Commun. (1999) 2341.Google Scholar
- 14.C.B. Choudhary, H.S. Maiti and E.C. Subbarao, in: Solid Electrolytes and Their Applications, E.C. Subbarao (ed.), (Plenum Press, New York, 1980, p. 47).Google Scholar
- 15.J.E. Kubsh, J.S. Rieck and N.D. Spencer, in: Catalysis and Automotive Pollution Control II, A. Crucq (ed.), (Elsevier, Amsterdam, 1991, p. 125).Google Scholar