加氢精制汽油重硫醇脱臭催化剂性能研究

Catalyst Applicable to Sweetening of the Higher Molecular Weight Mercaptans in Hydrogenated Gasoline

摘要:

针对FCC汽油重馏分加氢精制后的硫醇（称为重硫醇）的脱除开发了一种自制脱臭催化剂，考察了反应温度、催化剂质量分数、硫醇类型等对催化剂体系脱除硫醇效果的影响，并实际考察了催化剂体系对加氢精制汽油中重硫醇的脱除效果。实验结果表明，一定范围内，温度越高，硫醇脱除效果越好； 催化剂浓度越大，硫醇脱除效果越好；异构硫醇比正构硫醇难脱除，高碳数硫醇比低碳数硫醇难脱除；该催化剂体系可以将油品中100ug/g的硫醇硫降至5ug/g以下，博士试验合格。

Abstract:

A new type of sweetening catalyst was explored for removing high molecular weight mercaptan in hydrogenated gasoline. The effects of reaction temperature，catalyst concentration and mercaptan structure on mercaptan conversion were studied. The results showed that in a certain range, the catalytic activity can be increased by rising the reaction temperature and the concentration of catalyst. The lower molecular weight mercaptans and n-thiols could be easily oxidated than the contrary mercaptans. The novel catalyst could effectively oxidize the mercaptans to disulfides. The mercaptan concentration in gasoline could be reduced from 100ug/g to less than 5ug/g , and the Doctor Test became negative.