Abstract
A novel process for converting a mixture hydrocarbon fuel of methylcyclohexane (MCH) and toluene into H 2 and CO 2 in one step by integration of steam reforming (SR) and the water-gas shift (WGS) reaction is studied. The multifunctional activity of Ni-Re/Al 2 O 3 catalyst is directly tested by the coupled process of SR and WGS. A CO 2 /(CO + CO 2 ) ratio of 92% at a conversion of 15.6% is achieved on Ni-Re/Al 2 O 3 catalyst at 803 K. The combination of SR and WGS for converting the liquid hydrocarbon fuel into H 2 and CO 2 is more efficient on two beds of different temperatures. A high CO 2 /(CO + CO 2 ) 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. H 2 and CO 2 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 CO 2 is remarkably enhanced by the application of two beds of different temperatures. A high CO 2 /(CO + CO 2 ) 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.
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