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›› 2005, Vol. 5 ›› Issue (1): 32-35.

• 反应与分离 • 上一篇    下一篇

FCC汽油中的噻吩类硫化物烷基化硫转移反应脱硫

罗国华1,徐新,杨春育,佟泽民,彭少逸   

  1. 北京石油化工学院化工系
  • 出版日期:2005-01-20 发布日期:2005-01-20

Removal of Sulfur Compounds from FCC Gasoline by Olefinic Alkylation of Thiophenic Sulfur over Solid Acid Catalyst

LUO Guo-hua,XU Xin,YANG Chun-yu,TONG Ze-min,PENG Shao-yi   

  1. Dept. Chem. Eng., Beijing Inst. Petrochem. Technol.
  • Online:2005-01-20 Published:2005-01-20

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摘要： 以模型硫化物噻吩与异戊烯的烷基化反应为探针，研究了反应温度、反应压力以及原料中二烯烃杂质对三氯化铝固载改性的磺酸树脂催化剂AlCl3 CT175烷基化性能的影响. 结果表明，在反应温度为100~110℃、反应压力低于3.0 MPa条件下，原料中的二烯烃明显影响催化剂的活性稳定性，这与二烯烃在催化剂表面发生聚合反应结焦有关. 当反应压力高于3.0 MPa时，AlCl3 CT175催化剂催化模型硫化物噻吩与异戊烯的烷基化反应不仅具有很高的活性，噻吩硫化物均接近于完全转化，而且具有较理想的活性稳定性. 以噻吩的甲基取代衍生物相对集中的FCC汽油60~150℃馏分段为原料，在110℃, 3.0 MPa，质量空速2.33 h 1的反应条件下，考察了该馏分段中的噻吩类硫化物与烯烃在AlCl3 CT175催化剂上烷基化反应硫转移脱硫效果，结果表明占总硫98.27%的硫化物参与了烷基化硫转移反应，且该馏分段中的二烯烃含量也得到有效的降低.

关键词: FCC汽油, 噻吩, 烷基化反应, 烷基噻吩, 脱硫

Abstract: The influences of reaction conditions, including reaction temperature, pressure and diolefin impurity, on the catalysis performance of acid catalyst of AlCl3-supported CT175 resin have been studied by the alkylation reaction of thiophene as a model sulfur compound with isopentene as an alkylation agent. Under the reaction conditions of reaction temperature 100~110℃ and reaction pressure lower than 3.0 MPa, the decrease of the alkylation activity of AlCl3 CT175 catalyst results from the polymerization reaction of diolefin impurity in the feedstock over the surface of catalyst. However, AlCl3 CT175 catalyst shows excellent alkylation activity and stability when the reaction pressure is higher than 3.0 MPa, and the conversion of thiophene is nearly 100%. The desulfurization effectiveness of AlCl3 CT175 as catalyst for the removal of thiophenic sulfur compounds from the fraction of 60~150℃ boiling range of FCC gasoline is also investigated at the reaction conditions of 110℃, 3.0 MPa and 2.33 h 1 (WHSV), and the results show that over 98% of thiophenic sulfur compounds are converted into multi-alkylthiophene, and the diolefins in this fraction are effectively removed.

Key words: FCC gasoline, thiophene, alkylation reaction, alkylthiophene, desulfurization