Abstract
Abstract The present study focuses on the use of spinel ferrite (MFe 2 O 4 ) catalysts (M = Ni, Co, Fe, or Cu) integrated with mesoporous alumina for the high temperature water–gas shift (WGS) reaction. Among these catalysts, copper ferrite integrated with mesoporous alumina exhibits outstanding performance. To optimize the Cu/Fe ratio in the copper ferrite catalyst, we prepared different Cu x Fe (3− x ) O 4 -MA catalysts ( x = 0.5, 1.0, 1.5, 2.0, or 2.5) by varying the Cu/Fe mole ratio. Of the various Cu/Fe catalysts, the 1:1 mole ratio of Cu/Fe exhibited the highest CO conversion (84%) and 100% selectivity to CO 2 at a very high GHSV of 42,000 h −1 . The improved performance of the catalyst is correlated with its easier reducibility.
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