处理方法对活性炭在流化床反应器内甲烷催化裂解制氢活性的影响

Commercial activated carbon (AC) samples were employed as catalysts to produce CO-free hydrogen from decomposition of methane in a fluidizedbed reactor. The primary experimental results show that conversion of methane attains about 8% and 11% at 850℃ and 900℃, respectively. It reaches 12% and 16% at 850℃ and 900℃, respectively, after treating AC in concentrated HNO3 solution. The reason is attributed to formation of lots of highly active sites due to decomposition of oxygencontaining groups on the surface of AC produced during treatment process. The promoting effect of 0.16% Ni loaded on treated AC by ion-exchange process on the activity of AC was clearly better than that by dry impregnation.