Study of physical–chemical properties and catalytic activities of ZnCr2O4 spinel nano oxides obtained from different methods—Modeling the synthesis process by response surface methodology and optimization by genetic algorithm

CATEGORY: CATALYSTS
Study of physical–chemical properties and catalytic activities of ZnCr2O4 spinel nano oxides obtained from different methods—Modeling the synthesis process by response surface methodology and optimization by genetic algorithm

Type	Journal Article
Author	S. A. Hosseini
Author	M. C. Alvarez-Galvan
URL	http://www.sciencedirect.com/science/article/pii/S1876107015005751
Volume	61
Pages	261-269
Publication	Journal of the Taiwan Institute of Chemical Engineers
Date	April 2016
Abstract	Researchers characterized physicochemical properties of zinc chromite spinel obtained by sol–gel combustion, co-precipitation, and pechini methods using XRD, FTIR, SEM and TPR, and studied them for the catalytic combustion of toluene. The sample obtained by pechini method showed the highest activity in the catalytic combustion of toluene. Supported zinc chromite samples based on ZSM-5 and γ-Al2O3 were prepared by the pechini method with the ratio of spinel to support 2:1. Supported catalysts increased the rate of toluene conversion which is ascribed to a higher surface area and greater reducibility of zinc chromite in the supported catalysts. These factors also explain the better catalytic performance of ZnCr2O4/ZSM-5 compared than ZnCr2O4–Al2O3.