固体复合酸催化FCC汽油中噻吩类硫化物烷基化反应动力学

Kinetics of Alkylation of Thiophene Sulfide in FCC Gasoline over Solid Compound Acid Catalyst

以固体复合酸为催化剂,对汽油中的主要硫化物噻吩（T）、2-甲基噻吩（2-MT）、3-甲基噻吩（3-MT）、2,4-二甲基噻吩（2,4-DMT）烷基化硫转移反应动力学进行研究。结果表明：4种噻吩类硫化物转化率均随反应温度的升高而增大,适宜的动力学考察温度为403.15~433.15 K,当反应温度为433.15 K时,4种硫化物的转化率均达最大,大小依次为2-MT〉3-MT〉T〉2,4-DMT。4种硫化物的烷基化反应动力学方程均符合一级反应速率方程。T,2-MT,3-MT和2,4-DMT的烷基化反应活化能分别为27.92,25.98,45.25和27.29 kJ/mol,指前因子分别为4.427×103,5.316×103,9.98×105和3.91×103h-1。

Kinetics of catalytic alkylation of various sulfur compounds（thiophene（T）,2-methyl-thiophene（2-MT）,3-methyl-thiophene（3-MT）,2,4-di-methyl-thiophene（2,4-DMT）） in gasoline were investigated over solid compound acid catalyst.The results showed that the conversion of all thiophene sulfide increased with the increase of reaction temperature,and reached maximum value at 433.15 K.The reaction rates of T,2-MT,3-MT and 2,4-DMT followed the order： 2-MT3-MTT2,4-MT.The catalytic alkylation of sulfur transfer reactions were first order for concentration of T,2-MT,3-MT and 2,4-DMT,the activation energies were 27.92,25.98,45.25 and 27.29 kJ/mol,respectively,and the frequency factors were 4.427×103,5.316×103,9.98×105 and 3.91×103 h-1,respectively.