期刊
APPLIED CATALYSIS A-GENERAL
卷 358, 期 2, 页码 215-223出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2009.02.014
关键词
Dry reforming; NiO catalysts; CaO-ZrO2 supports; Electrical conductivity
资金
- CNPQ
- FAPESP
Nickel catalysts with a load of 5 wt% Ni, supported on pure ZrO2 and ZrO2 stabilized with 4, 8 and 14 mol% CaO, were prepared by the polymerization method. The samples were characterized by X-ray diffraction (XRD), temperature-programmed reduction with hydrogen (TPR-H-2), specific surface area (BET) and impedance spectroscopy (IS) and tested in the carbon dioxide reforming of methane. The XRD patterns showed the presence of the oxide precursor (NiO) and the tetragonal phase of CaO-ZrO2 solid solutions. According to the TPR-H-2 analysis, the reduction of various NiO species was influenced by the support composition. The electrical properties of the support have a proportional effect on the catalytic activities. Catalytic tests were done at 800 degrees C for 6 h and the composition of the gaseous products and the catalytic conversion depended on the CaO-ZrO2 solid solution composition and its influence on supported NiO species. A direct relation was found between the variation in the electrical conductivity of the support, the nickel species supported on it and the performance in the catalytic tests. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据