Conversion of Gasoline to Hydrogen by Coupling Reaction of Steam Reforming and Water Gas Shift on Highly Active Multifunctional Catalysts

摘要

A novel process for converting a mixture hydrocarbon fuel of methylcyclohexane(MCH) and toluene as model molecules of gasoline into H2 and CO2 in one step byintegration of steam reforming (SR) and water gas shift (WGS) reaction is studied. Themultifunctional activity of Ni-Re/Al2O3 catalyst is directly tested by coupling reaction of SRand WGS. A CO2/(CO+CO2) ratio of 92% at conversion of 15.6% is achieved on Ni-Re/Al2O3catalyst at 805K. The combination of SR and WGS for converting liquid hydrocarbons intoH2 and CO2 is more efficient on two catalyst beds. A high CO2/(CO+CO2) ratio of 97% athydrocarbon conversion of 17.8% is achieved on two catalyst beds. In addition, theconversion for the coupling reaction is evidently promoted by addition of molecular oxygento the reaction system. H2 and CO2 as the major product are produced from the liquidhydrocarbons by autothermal reforming (AR) combined with WGS reaction onmultifunctional catalyst of Ni/CeZSM-5. The coupling reaction for converting the liquidhydrocarbons into H2 and CO2 is remarkably enhanced by application of two catalyst beds. Ahigh CO2/(CO+CO2) ratio of 95% at hydrocarbon conversion of 60.1 % is achieved byintegration of AR and WGS reaction on two catalyst beds placed in one reactor.