Investigation of the effect of H2S on the performance of an iron/chromium-based high-temperature water–gas shift catalyst using simulated coal-derived syngas

Abstract

Abstract The effects of H 2 S concentrations on the performance of an iron/chromium-based high-temperature water–gas shift catalyst were investigated using simulated dry-feed coal-derived syngas. The experiments were performed in a differential reactor at a constant temperature of 450 °C and at approximately atmospheric pressure. Low concentrations of H 2 S in the syngas ( 2 S concentration (168–250 ppm), the catalyst lost approximately half of its activity. The reaction orders with respect to H 2 S concentration in the feed gas were calculated to be −0.24 ± 0.09 for a lower range of H 2 S concentration (17–70 ppm) and −0.55 ± 0.05 for a higher range of H 2 S concentration (120–1100 ppm).