In2O3-ZrO2/SAPO-11催化富含CO2合成气转化高品质汽油烃的研究OA

The conversion of CO2 into gasoline-range hydrocarbons represents a sustainable pathway to achieve deep decarbonization in the transportation sector.Nevertheless,the traditional Fischer-Tropsch synthesis(FTS)suffers from a broad product distribution,which restricts the achievable selectivity toward C5-C11 gasoline-range hydrocarbons to roughly 45％.This study presents the development of a bifunctional catalyst that integrates In2O3/ZrO2 metal oxides with SAPO-11 molecular sieves,aiming at efficiently converting CO2/CO mixtures into C5-C11 gasoline hydrocarbons.Catalysts with varying In/Zr ratios were prepared via co-precipitation.By employing a COx(CO/CO2)co-feeding strategy(CO/COx=0.5),the formation of by-product CO was significantly suppressed,thereby enabling the selectivity for gasoline hydrocarbons to exceed the maximum predicted by the Anderson-Schulz-Flory(ASF)model.Notably,under identical reaction conditions,the In2Zr1Ox/SAPO-11 catalyst exhibited higher performance compared with In2O3/SAPO-11 and ZrO2/SAPO-11.The COx conversion was elevated by 1.7％and 0.2％,while the selectivity toward C5-C11 hydrocarbons was enhanced by 8.0％and 16.0％,respectively.Furthermore,the In2Zr1Ox/SAPO-11 catalyst delivered a single-pass performance of 24％COx conversion and 68％selectivity for C5-C11 hydrocarbons at 380 ℃,3 MPa and a gas hourly space velocity(GHSV)of 2400 mL/(min·g).Within this product distribution,isoparaffins accounted for 32.6％of the total components,corresponding to an isoparaffin/neoparaffin ratio of 12.3.After 150 h of stability testing,the catalyst maintained a single-pass COx conversion of 23％and a C5-C11 selectivity of～65％,demonstrating excellent catalytic activity and promising potential for industrial application.