Hydrogenation of carbon dioxide over Fe-Cu-Na/zeolite composite catalysts: Na migration via solid-solid reaction and its effects on the catalytic activity

被引:19
作者
Xu, Q [1 ]
He, DH [1 ]
Fujiwara, M [1 ]
Tanaka, M [1 ]
Souma, Y [1 ]
Yamanaka, H [1 ]
机构
[1] MITI, AIST, Osaka Natl Res Inst, Ikeda, Osaka 563, Japan
关键词
carbon dioxide; hydrogenation; composite catalysts; iron; copper; sodium; zeolites; thermogravimetric analysis; reduction; solid-solid reaction;
D O I
10.1016/S1381-1169(98)00047-8
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Composite catalysts containing zeolites and Na-rich Fe-Cu Fischer-Tropsch catalysts were studied for the hydrogenation of carbon dioxide at 250 degrees C. Sodium migration from the surface of the F-T catalyst to the zeolite via solid-solid reaction seemed to change the acidity of the zeolite and the reduction degree of the Fe catalyst, which finding was supported by TG and XRD measurements. It was shown that branched and higher hydrocarbons can be obtained in good yields by using composite catalysts containing iron-based catalysts with moderate alkali content and zeolites with suitable acidity. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:161 / 168
页数:8
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