Preparation and characterization of a sulfur-free and chromium-free catalyst for high-temperature water-gas shift reaction

A sulfur-free and chromium-free catalyst for high-temperature water-gas shift reaction, withγ-Fe₂O₃ as the high activity crystalline phase, was prepared by liquor synthesis technology and was characterized by X-ray diffraction and Mossbouer spectroscopy. Catalytic activity was then tested and the influence of heat- resistant temperature, the content and ways of incorporation of the additive CoO on the activity were also discussed. The results show that the catalyst exhibits good activity before and after heat-resistance at 400°C, and that the activity of CoO can be attributed not only to its initial activity, but also to the ensuing promotion of thermostability.