Synthesis, characterization and catalytic evaluation of Vo x/Mg yAlo x in the decomposition of isopropanol

Química Nova

Meira, Débora M.¹  Cortez, Gilberto G.¹  Universidade de São Paulo, Lorena, Brasil¹ 

关键词: mixed oxide;    hydrotalcite;    V-;    Mg-;    Al catalyst.;   

DOI  :  10.1590/S0100-40422008000600003

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Vanadium oxide supported on hydrotalcite-type precursors was studied in the decomposition of isopropanol. Hydrotalcite-type compounds with different y = Mg+2/Al+3 ratios were synthesized by the method of coprecipitating nitrates of Mg+2 and Al+3 cations with K2CO3 as precipitant. The X-ray diffraction patterns of Al-rich hydrotalcite precursors showed the presence of crystalline phases of brucite and gibbsite. It was shown that chemical composition, texture, acid-base properties of the active sites and also Mg/Al ratio strongly affect the formation of the products in the oxidation of isopropanol. The Al-rich catalysts were much more active than the Mg-rich ones, converting isopropanol mainly to propylene.

【 授权许可】

Unknown