The hydrogenation of carbon dioxide was examined over various composite catalysts composed of Fe−Zn−M catalyst and zeolite. Fe−Zn−Zr/HY composite catalyst was confirmed to be efficient for the highly selective production of isobutane, which is regarded as a synthetic intermediate of MTBE (methyl tert -butyl ether). The composite catalyst of Fe−Zn−Zr catalyst with H-ZMS-5 formed C 5+ hydrocarbons in good yield. The ratios of branched hydrocarbons in C 5+ ones, which are suitable for high-octane gasoline, were over 90%.
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Tan et al. (1999) studied this question.
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