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

Quimica nova

Meira, Débora M.¹  Cortez, Gilberto G.¹ 

[1] Universidade de São Paulo, Lorena, Brasil

关键词: mixed oxide;    hydrotalcite;    V-;    Mg-;    Alcatalyst.;   

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-typeprecursors was studied in the decomposition of isopropanol. Hydrotalcite-typecompounds with different y = Mg+2/Al+3 ratios were synthesizedby the method of coprecipitating nitrates of Mg+2 and Al+3cations with K2CO3 as precipitant. The X-ray diffractionpatterns of Al-rich hydrotalcite precursors showed the presence of crystallinephases of brucite and gibbsite. It was shown that chemical composition, texture,acid-base properties of the active sites and also Mg/Al ratio strongly affectthe formation of the products in the oxidation of isopropanol. The Al-rich catalystswere much more active than the Mg-rich ones, converting isopropanol mainly topropylene.

【 授权许可】

CC BY