Effect of metal load in Co/Al2o3 catalysts for ethanol steam reforming

Quimica nova

Assaf, José M.¹  Santos, Rudye K. S.²  Assaf, Elisabete M.²  Batista, Marcelo S.² 

[1] Universidade Federal de São Carlos, São Carlos;Universidade de São Paulo, São Carlos

关键词: ethanol steam reforming;    hydrogen production;    cobalt oxide.;   

DOI  :  10.1590/S0100-40422005000400006

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The developmentof cobalt catalysts to produce hydrogen from ethanol is the goal of this investigation.Co/Al2O3 catalysts were prepared by impregnation and characterizedby atomic absorption, nitrogen adsorption, X-ray diffraction, Raman spectroscopy,temperature programmed reduction and carbon analysis. The catalysts containedCo3O4 oxide and Co3+ and Co2+ speciesinteracting with alumina. The cobalt load affects the crystal size and the crystallinestructure and higher Co loads influence the reaction mechanism, changing theselectivity of the catalysts, decreasing the amount of CO produced and avoidingthe formation of products catalyzed by the support. The ethanol conversion was50-70% with 10-<1% of CO in the hydrogen.

【 授权许可】

CC BY