Abstract
Composite catalysts containing zeolites and Na-rich Fe–Cu Fischer–Tropsch catalysts were studied for the hydrogenation of carbon dioxide at 250°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.
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