Low-Temperature Complete Oxidation of Ethyl Acetate Over CeO2-Supported Precious Metal Catalysts

Abstract

Catalytic combustion of ethyl acetate was investigated over various CeO 2 -supported precious metal catalysts prepared by impregnation method, and the effect of reduction treatment on the activity was examined. Among the catalysts tested, Ru/CeO 2 achieved the highest activity for ethyl acetate combustion, and the activity was almost unchanged by the heat treatment in a hydrogen atmosphere. In the cases of Pt/CeO 2 , Pd/CeO 2 , and Rh/ CeO 2 , the catalytic activity was enhanced by the reduction treatment at 400°C, though the activity of the reduced catalysts was still inferior to that of Ru/CeO 2 . It was confirmed by temperature-programmed reduction that the reduction of the ruthenium species was initiated at the lowest temperature among the CeO 2 -supported precious metals. The precious metal species reducible at lower temperatures should be responsible for the high activity in the complete oxidation of ethyl acetate.

Bimetallic Ru-Re/γ-Al2O3 catalysts for the catalytic combustion of propane: Effect of the Re addition

“…Accordingly, a correlation between the catalytic activity (both per g of the catalyst per second or TOF) and the reducibility is clearly visible for these catalysts. Mitsui et al [41] studied oxidation of ethyl acetate over CeO 2 -supported metal (Ru, Pt, Pd) catalysts and suggested that metal species reducible at lower temperatures should be responsible for the high activity. In fact, the reduction of ruthenium oxide on CeO 2 was initiated at lower temperature than in the case of the other metals, resulting in the highest activity.…”

Development of Ceria-Supported Ruthenium Catalysts Effective for Various Synthetic Reactions

“…1 [21][22][23][24][25][26][27][28][29][30]. In this chapter, the performances of the Ru/CeO 2 catalysts prepared from various CeO 2 powders were compared in terms of the activity for aerobic oxidation of benzyl alcohol as a model reaction.…”

“…water [25,26], ammonia synthesis [27], N 2 O decomposition [21], complete oxidation of ethyl acetate and propylene [28,29], and other reactions. Recently, Ce 1-x Ru x O 2-d solid solution was reported as a new oxygen storage material [30].…”

Mesoporous manganese oxides prepared by solution combustion synthesis as catalysts for the total oxidation of VOCs

“…Catalytic oxidation is considered one of the most effective techniques for VOC removal, since the total oxidation of diluited fuel occurs at relatively low temperatures, and this leads to low emissions of NO x and unburned fuels [8][9][10][11]. This abatement technique is highly versatile, and offers the possibility of treating waste streams with different VOC concentrations and effluent flow rates [2][3][4].…”