Preparation And Characterization Of Supported Catalyst On Hydrogen Production From Coal Pyrolysis

The paper mainly focuses on the study of the effect of metal oxide supported catalysts on hydrogen production from coal pyrolysis. Using y-Al2O3 as carrier and diverse metal nitrates as impregnation solutions, metal oxide supported catalysts and bimetal oxide supported catalysts were prepared by the method of equivalent volume impregnation. NiO/γ-Al2O3 and Ag2O-Co3O4/γ-Al2O3 catalyst was selected as an example and via diverse conditional tests. Furthermore, the optimal conditions of the NiO/γ-Al2O3 and Ag2O-Co3O4/γ-Al2O3 were confirmed. Several kinds of modern advanced testing measures were conducted to identify the structure and performance of the catalysts such as XRD,XPS,BET,SEM,TPR. The results showed that the optimal condition of preparation about NiO/γ-Al2O3 and Ag2O-Co3O4/γ-Al2O3 are as follows:The load of Ni is 10%, calcination temperature is 450℃, calcination time is 5h; the load of Ag is 8%, calcination temperature is 450℃, calcination time is 4h; the load of cobalt is 8%, calcination temperature is 450℃, calcination time is 4h. The study of the experiment showed that, NiO/γ-Al2O3 and Ag2O-Co3O4/γ-Al2O3 supported catalysts have pretty high catalytic activities for making hydrogen from coal prolysis. Thus, NiO/γ-Al2O3 and Ag2O-Co3O4/γ-Al2O3 are confirmed as the excellent catalysts for making hydrogen production.