Studies of Nickel/Samarium-Doped Ceria for Catalytic Partial Oxidation of Methane and Effect of Oxygen Vacancy

Catalysts

I-Hsiang Tseng¹  Andrew C. Chien¹  Nicole J. Ye¹  Chao-Wei Huang² 

[1] Department of Chemical Engineering, Feng Chia University, Taichung 40724, Taiwan;Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan;

关键词: Ni/SDC;    microwave;    syngas;    metal-support;    partial oxidation of methane;    fuel cell;   

DOI  :  10.3390/catal11060731

来源: DOAJ

【 摘 要 】

We investigated the performance of nickel/samarium-doped ceria (Ni/SDC) nanocatalysts on the catalytic partial oxidation of methane (CPOM). Studies of temperature-programmed surface reaction and reduction reveal that catalytic activity is determined by a synergistic effect produced by Ni metals and metal-support interaction. Catalytic activity was more dependent on the Ni content below 600 °C, while there is not much difference for all catalysts at high temperatures. The catalyst exhibiting high activities toward syngas production (i.e., a CH₄ conversion >90% at 700 °C) requires a medium Ni-SDC interaction with an Sm/Ce ratio of about 1/9 to 2/8. This is accounted for by optimum oxygen vacancies and adequate ion diffusivity in the SDCs which, as reported, also display the highest ion conductivity for fuel cell applications.

【 授权许可】

Unknown