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This article reports the production of CO_x free hydrogen and carbon nanofibers by the catalytic decomposition of methane over Ni-Al_2O_3-SiO_2 catalysts.The influence of reaction temperature,pretreatment temperature,and effect of reductive pretreatment on the decomposition of methane activity is investigated.The physico-chemical characteristics of fresh and deactivated samples were characterized using BET-SA,XRD,TPR,SEM/TEM,CHNS analyses and correlated with the methane decomposition results obtained.The Ni-Al-Si (4:0.5:1.5) catalyst reduced with hydrazine hydrate produced better H_2 yields of ca.1815 mol H_2/mol Ni than the catalyst reduced with 5% H_2/N_2.
This article reports the production of CO_x free hydrogen and carbon nanofibers by the catalytic decomposition of methane over Ni-Al_2O_3-SiO_2 catalysts. The influence of reaction temperature, pretreatment temperature, and effect of reductive pretreatment on the decomposition of methane activity is investigated. Physico-chemical characteristics of fresh and deactivated samples were characterized using BET-SA, XRD, TPR, SEM / TEM, CHNS analyzes and correlated with the methane decomposition results obtained. The Ni-Al-Si with hydrazine hydrate produced better H2 yields of 18.18 mol H 2 / mol Ni than the catalyst reduced with 5% H 2 / N 2.