期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 33, 期 20, 页码 5493-5500出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2008.07.040
关键词
Syngas; Autothermal reforming of methane; Combined support; Ni catalysts; Fluidized-bed reactor
资金
- National Natural Science Foundation of China [20433030, 90610002]
- Ministry of Science and Technology of China through the National Key Project of Fundamental Research [2007CB210207]
- Hi-tech Research and Development Program of China [2007AA05Z415]
Production of syngas via autothermal reforming of methane (MATR) in a fluidized bed reactor was investigated over a series of combined CeO2-ZrO2/SiO2 supported Ni catalysts. These combined CeO2-ZrO2/SiO2 supports and supported Ni catalysts were characterized by nitrogen adsorption, XRD, NH3-TPD, CO2-TPD and H-2-TPR. It was found that the combined supports integrated the advantages Of SiO2 and CeO2, ZrO2. That is, they have bigger surface area (about 300 m(2)/g) than pure CeO2 and ZrO2, stronger acidity and alkalescence than that of pure SiO2, and enhanced the mobility of H adatoms. Ni species dispersed highly on these combined CeO2-ZrO2/SiO2 supports, and became more reducible. Ni catalysts on the combined supports possess higher CO2 adsorption ability, higher methane activation ability and exhibited higher activity for MATR. H-2/CO ratio in product gas could be controlled successfully in the range of 0.99-2.21 by manipulating the relative concentrations of CO2 and O-2 in feed. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
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