FERRER, V.:
Proceedings XXVI Ibero-American Catalysis Congress CICAT2020, pag. 1554-1559.
Abstract
Fresh and spent CuO/ZnO/Al2O3 industrial catalyst used in a water-gas shift reaction (WGSR) was studied. The samples were characterized by X-ray fluorescence, X-ray diffraction, Temperature programmed reduction and CO chemisorption. The catalytic performance was evaluated under consecutive cycles of WGSR at low temperature (200-250 °C). The spent catalysts exhibited a decrease in surface area, as well as a modification of the crystalline structure, loss of Cu metallic surface and presence of sulfur. WGSR was favored at 250 °C, registering high CO conversions (≈90%) for the fresh sample during successive reaction cycles. The spent catalysts kept a high activity (≈80%), except for the catalyst portion collected at the reactor’s top, which could be more affected because of high sulfur content and/or water condensation during the reactor’s cooling.