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-C4 (iso-butane) is formed from propylene and methanol through MTG (methanol to gasoline) reaction and i-C5 (iso-pentane) obtained from the reaction of C2 and C3 through the additive dimerization. A part of C1, C4 is formed on the sole Fe–Zn–Zr catalyst from methanol for the CO2 hydrogenation over Fe–Zn–Zr/HY composite catalyst.