Preparation of Ag–M (M: Fe, Co and Mn)–ZSM‐5 bimetal catalysts with high performance for catalytic oxidation of ethyl acetate

Abstract

The catalytic combustion of ethyl acetate has been investigated in a series of mono‐metal silver and bimetal Ag–M (M: Fe, Co and Mn)‐modified HZSM‐5 zeolites. The objective was to find a catalyst with high superior activity, selectivity towards deep oxidation product and stability. The catalyst activity was measured under excess oxygen condition in a fixed bed reactor operated at gas hourly space velocity (GHSV) = 30000 h−1, reaction temperature between 150 and 450°C and ethyl acetate inlet concentration of 1000 ppm. Both Fe–Ag–ZSM‐5 and Co–Ag–ZSM‐5 catalysts exhibited high activity in the oxidation of ethyl acetate. The sequences of catalytic activity and catalytic stability were as follows: Fe–Ag–ZSM‐5 > Co–Ag–ZSM‐5 > Mn–Ag–ZSM‐5 > Ag–ZSM‐5 > HZSM‐5. Total conversion of ethyl acetate was achieved at above 250°C. The catalysts were characterized by inductively coupled plasma atomic emission spectroscopy, X‐ray diffraction, transmission electron microscopy, scanning electron microscopy and X‐ray photoelectron spectroscopy.