高水气比和高CO原料气有机硫转化水解催化剂研制

Study on catalyst for organic sulfide conversion in raw-gas with high steam/dry gas and high CO content

针对高压和高水气工艺条件及现有工业有机硫转化催化剂性能达不到要求的现状,研究载体材料和助剂对水解剂抗水合性能的影响,黏结剂对水解剂机械强度和和结构稳定性的影响,开发能在高压、高水气比和高CO工艺条件下使用的新型有机硫水解转化催化剂QSJ-04。考察水气比、空速、反应温度和原料气中COS含量对水解剂活性的影响,进行水解剂稳定性测试,采用XRD、SEM、IR表征水解剂的特性。结果表明,水解剂QSJ-04具有优良的结构稳定性,对COS最高水解率92.8%。满足了煤化工新工艺对有机硫转化催化剂性能的要求。

Current industrial catalysts employed for organic sulfur conversion (hydrolysis) could not meet the requirements of high pressure and high steam/dry gas conditions.This research dived into several approaches to solve the above problem,including the effects of catalyst support and co-promoter materials on the anti-hydration performance of hydrolysis catalyst,as well as the impacts of binder materials on the mechanical strength and structure stability of hydrolysis catalyst.A new hydrolysis catalyst,marked as QSJ-04,was developed with enhanced organic sulfur conversion suited to high pressure,high steam/dry gas and much higher CO concentration in industrial conditions.XRD,SEM,FT-IR and NH 3 -TPD were employed in the catalyst characterizations.Impacts of steam/dry gas,velocity,reaction temperature as well as the COS concentration on the hydrolysis performance of catalyst were examined.Series of long term catalyst tests indicated the QSJ-04 catalyst possessed excellent COS conversions up to 92.8% with effectively extended catalyst lifetime based on the greatly enhanced structure stability.