Hydrogenation of carbon dioxide over Fe–Cu–Na/zeolite composite catalysts: Na migration via solid–solid reaction and its effects on the catalytic activity
✍ Scribed by Qiang Xu; Dehua He; Masahiro Fujiwara; Mutsuo Tanaka; Yoshie Souma; Hiroshi Yamanaka
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 96 KB
- Volume
- 136
- Category
- Article
- ISSN
- 1381-1169
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✦ Synopsis
Composite catalysts containing zeolites and Na-rich Fe-Cu Fischer-Tropsch catalysts were studied for the hydrogenation of carbon dioxide at 2508C. 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.