催化裂化汽油中特征硫化物噻吩的催化氧化脱硫

以负载金属铈的分子筛为催化剂，在H2O2-HCOOH体系中，对催化裂化（FCC）汽油中特征硫化物噻吩（C4H4S）的正庚烷溶液进行了氧化脱硫研究。考察了氧化剂用量、溶剂、氧化时间、氧化温度、相转移剂等因素对噻吩脱除效果的影响，并对对噻吩的氧化反应历程进行了初步的探讨。实验结果表明：以负载金属铈的分子筛为催化剂，在反应温度50℃，反应60min, H2O2：S＝10：1（mol/mol），H2O2：HCOOH＝1：1（V/V）的条件下，正庚烷溶液C4H4S的脱除率达到了78.2％，加入乳化剂OP可使C4H4S的脱硫率达到94.5％，但四丁基溴化胺（TBAB）的加入使氧化后的样品中出现了噻吩的溴代产物。     

硅胶催化双氧水甲酸氧化噻吩类化合物的研究

1 INTRODUCTION Due to growing environmental concern to impact of sulfur oxides contained in engine exhaust emissions, sulfur content specifications in light oils are becoming more and more stringent worldwide[1,2]. The necessity of producing low sulfur fuels to meet new regulation mandates requires new desulfurization techniques. As for the current hydrodesulfurization (HDS) technology, higher temperature, higher pressure, larger reactor volume, and more active catalysts are unavoidable,…     

负载金属氧化物分子筛催化氧化模拟汽油的脱硫研究

A simulated gasoline consisting of model sulfur compounds of thiophene （C4H4S） and 3-methythiophene （3-MC4H4S） dissolved in n-heptane was tested for the oxidative desulfurization in the hydrogen peroxide （H202） and formic acid oxidative system over metal oxide-loaded molecular sieve. The effects of the oxidative system, loaded metal oxides, phase transfer catalyst, the addition of olefin and aromatics on sulfur removal were investigated in details. The results showed that the sulfur removal rate of simulated gasoline in the H202/formic acid system was higher than in other oxidative systems. The cerium oxide-loaded molecular sieve was found very active catalyst for oxidation of simulated gasoline in this system. The sulfur removal rates of C4H4S and 3-MC4H4S were enhanced when phase transfer catalyst （PTC） was added. However, the sulfur removal rate of simulated gasoline was reduced with the addition of olefin and aromatics.