高浓度COS水解催化剂抗硫中毒性能的孔隙效应

Effects of pore structure on anti-sulfur poisoning of the catalyst for high concentration carbonyl sulfide hydrolysis

通过添加聚合物类、纤维素类及无机盐类的一种或多种造孔剂制备一系列COS水解催化剂。采用压汞法对催化剂的孔隙特征及孔道结构进行表征,并将孔隙特性与催化剂的COS水解转化率及硫沉积率进行关联。结果表明,聚合物类、纤维素类及无机盐类3类造孔剂联合作用的催化剂既有最大的孔容及比表面积,也有最适宜的通道,最利于产物H2S的扩散,从而表现出良好的抗硫中毒性能。

A series of COS hydrolysis catalyst were prepared by using polymer or cellulose or inorganic salts,or any mixtures of these three kinds of material as pore-forming agent.The pore structure of catalysts were characterized by mercury porosity method and correlated with the conversion and sulfur deposit of catalyst.The results show that the catalyst using the mixtures of all these three kind of material as pore-forming agent has the maximal pore volume and surface area as well as the optimum tortuosity channel,in favor of the diffusing of H2S in catalyst,and hence exhibit the super ability of anti-sulfur poisoning.