燃料油中硫化物的选择性吸附研究进展

综述了不同吸附剂脱硫和选择性吸附两方面的机理及研究进展。在燃料油选择性吸附脱硫研究的吸附剂中，使用最多的是金属阳离子改性的Y型分子筛，以Cu、Ni和Ce改性的Y型分子筛最为成熟。其吸附脱硫机理主要包括π-络合吸附和金属S—M键作用。燃料油（以汽油和柴油为主）组成复杂，含大量烯烃、芳烃、烷烃及少量的氮化物、氧化物、水及胶质，影响吸附剂的吸附脱硫效果，而烯烃和芳烃严重影响吸附剂的选择性吸附脱硫性能。各种吸附剂对富含烯烃或芳烃的燃料油中的硫化物选择性和硫容量不同，但都不高。研究吸附剂与燃料中的硫化物的选择性吸附机理，对研发具有高选择性和高吸附容量的吸附剂起推动作用。

Progress in desulfurization for fuel oil by selective adsorption

Mechanisms of and advances in different adsorbent desulfurization and selective adsorption were reviewed. In the desulfurization research of selective adsorbent, the metal ion modified Y zeolites were used most, especially the Y zeolites modified by Cu, Ni and Ce. Adsorption desulfurization mechanism mainly included π complexation adsorption and the S-M metal sulfur bond. The fuel oils, such as gasoline and diesel, were complex mixtures which contained numerous organic compounds (paraffins, olefins and aromatics) and a small quantity of nitride, oxide, water and colloid which influenced on adsorption desulfurization. Olefins and aromatics, however, affected seriously the performance of the selective adsorprtion desulfurization of adsorbent. Sulfur capacity and selectivity of the absorbents for fuel oils which were rich in olefins and aromatics were low. Therefore it has great significance to study the corresponding adsorption mechanism and adsorbent which possess high selectivity and sulfur capacity.