Synthesis of isoalkanes over Fe-Zn-Zr/HY composite catalyst through carbon dioxide hydrogenation

The reaction path of isoalkanes formation via CO2 hydrogenation was studied over the Fe-Zn-Zr/HY composite catalyst, which gives high selectivity to isoalkanes. The results indicate that the reverse water-gas shift reaction is not the indispensable step for the synthesis of hydrocarbons. And i-C-4 (iso-butane) is formed from propylene and methanol through MTG (methanol to gasoline) reaction and i-C-5 (iso-pentane) obtained from the reaction Of C-2 and C-3 through the additive dimerization. A part of C-1, C-4 is formed on the sole FeZn-Zr catalyst from methanol for the CO2 hydrogenation over Fe-Zn-Zr/HY composite catalyst. (c) 2007 Elsevier B.V. All rights reserved.