TY - JOUR
T1 - Rh/MgO/Ce0.5Zr0.5O2 supported catalyst for autothermal reforming of methane
T2 - The effects of ceria-zirconia doping
AU - Yuan, Zhongshan
AU - Ni, Changjun
AU - Zhang, Chunxi
AU - Gao, Diannan
AU - Wang, Shudong
AU - Xie, Yuming
AU - Okada, Akira
N1 - Funding Information:
The authors gratefully acknowledge the support of Corning Incorporated (USA) under the Joint Research Master Agreement between Dalian Institute of Chemical Physics (China) and Corning Incorporated (USA). Part of the present work was subsidized by the National Basic Research Program of China (No. 2004CB719506) and the National High Technology Research and Development Program of China (No. 2007AA05Z148). The authors also appreciate Dr. Tianjun Sun and Dr. Lei Cao for their kindly help in the analysis of HREM micrographs.
PY - 2009/8/15
Y1 - 2009/8/15
N2 - The supported Rh/MgO/Ce0.5Zr0.5O2 catalysts were developed for autothermal reforming of methane. The effects of ceria-zirconia addition on the Rh catalyst were characterized with BET, XRD, SAED, HREM and TPR. The catalytic performance was evaluated on a flow through reactor. Results showed that the addition of ceria-zirconia enhanced the catalyst stability due to the interactions between ceria-zirconia, MgO promoter and the active component Rh. Meanwhile, the selectivity towards hydrogen in reformate was also boosted because of the increased water gas shift activity by the mixed oxides. The results also showed that the structural properties, the textural properties and the redox properties of ceria-zirconia had great influences on the catalyst performance, especially on the catalyst stability. Formations of single phase solid solution, larger pore size as well as Ce/Zr ratio at 1/1 were more desirable for ceria-zirconia dopant. As a result, one of the optimized honeycomb catalysts with the composition of 0.3% Rh/2.5% MgO/43.2% Ce0.5Zr0.5O2/54.0% cordierite (wt.%) has been continually operated at 800 °C up to 2000 h without deactivation.
AB - The supported Rh/MgO/Ce0.5Zr0.5O2 catalysts were developed for autothermal reforming of methane. The effects of ceria-zirconia addition on the Rh catalyst were characterized with BET, XRD, SAED, HREM and TPR. The catalytic performance was evaluated on a flow through reactor. Results showed that the addition of ceria-zirconia enhanced the catalyst stability due to the interactions between ceria-zirconia, MgO promoter and the active component Rh. Meanwhile, the selectivity towards hydrogen in reformate was also boosted because of the increased water gas shift activity by the mixed oxides. The results also showed that the structural properties, the textural properties and the redox properties of ceria-zirconia had great influences on the catalyst performance, especially on the catalyst stability. Formations of single phase solid solution, larger pore size as well as Ce/Zr ratio at 1/1 were more desirable for ceria-zirconia dopant. As a result, one of the optimized honeycomb catalysts with the composition of 0.3% Rh/2.5% MgO/43.2% Ce0.5Zr0.5O2/54.0% cordierite (wt.%) has been continually operated at 800 °C up to 2000 h without deactivation.
KW - Ceria-zirconia
KW - Methane autothermal reforming
KW - Supported Rh/MgO/CeZrO catalyst
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U2 - 10.1016/j.cattod.2009.02.032
DO - 10.1016/j.cattod.2009.02.032
M3 - Article
AN - SCOPUS:67849128688
SN - 0920-5861
VL - 146
SP - 124
EP - 131
JO - Catalysis Today
JF - Catalysis Today
IS - 1-2
ER -