介孔HPW-TiO2催化剂用于水泥窑协同处理MSS氧化脱硫

Mesoporous PHW-TiO2 Catalyst Application in Oxidative Desulfurization during Co-processing of MSS in Cement Kiln

摘要:

复杂含硫物的逸出是水泥窑协同处理城市生活污水污泥（MSS）技术中亟待解决的难题.采用聚合物导向自组装法及浸渍法制备负载磷钨酸（HPW）的介孔二氧化钛（TiO₂）催化剂（简称介孔HPW-TiO₂催化剂），并对含硫物的催化效果进行表征.结果表明：相较浸渍法，采用聚合物导向自组装法可获得更大比表面积和更多酸性位点的介孔HPW-TiO₂催化剂；在水泥预热窑温度（200、260、320 ℃）下，采用聚合物导向自组装法合成的催化剂表现出更加高效的催化性能，能够有效加速MSS中的芳香族-S及脂肪族-S有机含硫物氧化转化为亚砜和砜.

Abstract:

Pollution of complex sulfur compounds is a pressing issue in the technology of co-processing municipal sewage sludge （MSS） in cement kilns. Mesoporous titanium dioxide （TiO₂） catalysts loaded with phosphotungstic acid （HPW）， referred to as mesoporous HPW-TiO₂ catalysts， were prepared using polymer-directed self-assembly and impregnation methods， and their catalytic effects on sulfur compounds were characterized. The results indicate that， compared to the impregnation method， the polymer-directed self-assembly approach yields mesoporous HPW-TiO₂ catalysts with larger specific surface areas and more acidic sites. At cement kiln preheater temperatures （200， 260， 320 ℃）， the catalysts synthesized via the polymer-directed self-assembly method exhibit more efficient catalytic performance， effectively accelerating the oxidation conversion of aromatic-S and aliphatic-S organosulfur compounds in MSS into sulfoxides and sulfones.