Caracterização de catalisadores Cu-K2O/MXOY-Nb2O5 (M=Ce, La e Al) pela técnica de adsorção/dessorção de N2

Abstract

The production of hydrogen by ethanol reforming is a process that requires an effective catalyst, the challenge is to find cheap catalysts, active and selective reaction. So Cu-K2O/Nb2O5 (CKN) catalysts are extensively studied, but it is essential to the addition of promoters in the catalyst to the conversion rate and selectivity of ethanol catalytic grow. The study of the textural properties of the catalyst work is extremely important in this case. The CKNA (Cu-K2O/Nb2O5-Al2O3) showed higher specific surface area, therefore a larger volume of adsorbate, becoming the most promising catalysts. The characterization of adsorption and desorption of N2 showed materials with the presence, mostly, of mesopore. Micropore was also detected by the t-method, But so negligible compared to the surface area calculated by the BET method.