A novel process for converting a mixture hydrocarbon fuel of methylcyclohexane (MCH) and toluene into H-2 and CO2 in one step by integration of steam reforming (SR) and the water-gas shift (WGS) reaction is studied. The multifunctional activity of Ni-Re/Al2O3 catalyst is directly tested by the coupled process of SR and WGS. A CO2/(CO + CO2) ratio of 92% at a conversion of 15.6% is achieved on Ni-Re/Al2O3 catalyst at 803 K. The combination of SR and WGS for converting the liquid hydrocarbon fuel into H-2 and CO2 is more efficient on two beds of different temperatures. A high CO2/(CO + CO2) ratio of 97% at a hydrocarbon conversion of 17.8% is achieved on the two beds of different temperatures. In addition, the conversion for the coupled process is evidently promoted by the addition of molecular oxygen to the reaction system. H2 and CO2 are produced as the major products from the liquid hydrocarbon fuel by autothermal reforming (AR) combined with the WGS reaction on the multifunctional catalyst Ni/CeZSM-5. The coupled process for converting the liquid hydrocarbon fuel into H-2 and CO2 is remarkably enhanced by the application of two beds of different temperatures. A high CO2/(CO + CO2) ratio of 95% at a hydrocarbon conversion of 60.1% is achieved by integration of AR and the WGS reaction on two catalyst beds in one reactor.