THE ANTI-SULFIDE PERFORMANCE OF TITANIUM OXIDE IN COS HYDROLYSIS

摘要

The γ-Al_2O_3 was the carrier usually used in COS hydrolysis reaction in industry applications. It was inevitably to bring sulfate poison on the surface of alumina-base catalyst because of oxygen in the raw gas. The case was became more serious in the condition of high COS concentration. Some catalyst supported titania for organic sulphur hydrolyst had developed overseas. These investigations showed that titania could restrain the production of sulfur or sulfate [1,2]. But tinatia as carrier had some disadvantages such as smaller surface area, lower mechanical strength and higher cost [3]. These shortcomings had limited the commercial appliance of titania as catalyst carrier. Since the 1980s, some studies have begun to concern in modification of alumina by titania or that of titania by alumina. In the field of gas purification, the mixture carrier of TiO_2- Al_2O_3 was more applied in hydrogenation desulfurization at the present [4].