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

摘要

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.