Design of stable Ni catalysts for partial oxidation of methane to synthesis gas
Design of stable Ni catalysts for partial oxidation of methane to synthesis gas
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DOI：
10.1006/jcat.1998.2051
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发表时间：
1998-07
影响因子：
7.3
通讯作者：
Yongwu Lu;Yu Liu;Shikong Shen
中科院分区：
文献类型：
--
作者：
Yongwu Lu;Yu Liu;Shikong Shen
The supported Ni catalysts with CaAl{sub 2}O{sub 4} spinel compound layer existed between Ni and Al{sub 2}O{sub 3} have been prepared, and the effect of the CaAl{sub 2}O{sub 4} spinel layer on the stability of the catalysts for the partial oxidation of methane to syngas (CO + H{sub 2}) has been investigated at high space velocity (250 L/g{center_dot}h). Also, the catalysts have been characterized by XRD, TG/DTA. The Ni catalysts with CaAl{sub 2}O{sub 4} spinel layer existed between Ni and Al{sub 2}O{sub 3} show good stability for this process with the CH{sub 4} conversion of {approximately}83%, syngas selectivity of >90% and the coke deposit of <1 wt% during a longtime running at 873 K. The CaAl{sub 2}O{sub 4} spinel layer can effectively suppress the phase transformation to form NiAl{sub 2}O{sub 4} spinel phases and stabilize the Ni tiny crystallite, to which the good stability of the catalyst contributes.
The supported Ni catalysts with CaAl{sub 2}O{sub 4} spinel compound layer existed between Ni and Al{sub 2}O{sub 3} have been prepared, and the effect of the CaAl{sub 2}O{sub 4} spinel layer on the stability of the catalysts for the partial oxidation of methane to syngas (CO + H{sub 2}) has been investigated at high space velocity (250 L/g{center_dot}h). Also, the catalysts have been characterized by XRD, TG/DTA. The Ni catalysts with CaAl{sub 2}O{sub 4} spinel layer existed between Ni and Al{sub 2}O{sub 3} show good stability for this process with the CH{sub 4} conversion of {approximately}83%, syngas selectivity of >90% and the coke deposit of <1 wt% during a longtime running at 873 K. The CaAl{sub 2}O{sub 4} spinel layer can effectively suppress the phase transformation to form NiAl{sub 2}O{sub 4} spinel phases and stabilize the Ni tiny crystallite, to which the good stability of the catalyst contributes.