Study on Hydrotalcite-like Derived Zn-Ni-Al-Fe-O Catalyst for AutoThermal Reforming of Acetic Acid to Produce Hydrogen

Abstract

Zn2.4 Ni0.6 AlxFe1－xO4.5±δ(x=1/0.5/0) series of hydrotalcite-like nickel-based catalysts were prepared by coprecipitation method, which were used for autothermal reforming of acetic acid to produce hydrogen. The catalysts were characterized by XRD, H2-TPR, BET, XPS and other characterization methods. The results showed that Zn2.4 Ni0.6 Al0.5 Fe0.5 O4.5±δ conversion rate of acetic acid was maintained at 100% in autothermal reforming of acetic acid, and the hydrogen yield was 2. 39mol-H2/mol-HAc. The Zn-Al hydrotalcite precursor is roasted to form ZnO-based composite oxide. The addition of appropriate amount of iron increases the specificsurface area of the catalyst. After reduction, FeNiZn alloy is formed. The electron donating effects of Fe and Zn improve the oxidation resistance of Ni, and the oxidation sintering and carbon deposit resistance of the catalyst are improved.