石油学报(石油加工) ›› 2017, Vol. 33 ›› Issue (6): 1089-1096.doi: 10.3969/j.issn.1001-8719.2017.06.007

• 研究报告 • 上一篇    下一篇

分子筛与介孔炭复合型直馏柴油吸附脱硫材料

王楠, 李剑, 杨旭, 杨肖嵘, 杨丽娜   

  1. 辽宁石油化工大学 石油化工学院, 辽宁 抚顺 113001
  • 收稿日期:2017-01-18 修回日期:2017-06-27 出版日期:2017-11-25 发布日期:2018-01-24
  • 通讯作者: 杨丽娜,女,教授,博士,主要从事石油化学品、石油加工助剂与添加剂研究;E-mail:yanglnzg@163.com E-mail:lnqdsd@yahoo.com.cn
  • 作者简介:第一作者:王楠,女,硕士研究生,从事石油化学品、石油加工助剂与添加剂研究;E-mail:yanglnzg@163.com
  • 基金资助:
    辽宁省教育厅项目(L2016018, L2015296, LJQ2015062),  抚顺市科技计划项目(FSKJHT201376)资助

The Composite of the Molecular Sieve and Ordered Mesoporous Carbon Used for Desulfurization of Straight Run Diesel

WANG Nan, LI Jian, YANG Xu, YANG Xiaorong, YANG Lina   

  1. College of Petroleum Engineering, Liaoning University of Petroleum & Chemical Technology, Fushun 113001, China
  • Received:2017-01-18 Revised:2017-06-27 Online:2017-11-25 Published:2018-01-24

摘要: 将分子筛HZSM5与有序介孔碳(OMC)复合,制得HZSM5/OMC。采用XRD、BET、FITR、SEM、TEM和NH3TPD等手段表征HZSM5/OMC和OMC。结果表明,HZSM5/OMC具有微介孔结构,比表面积、孔容、孔径及酸性均高于OMC。以直馏柴油的主要硫化物苯并噻吩为探针分子,考察了HZSM5/OMC的吸附脱硫性能;研究了HZSM5/OMC吸附苯并噻吩的热力学和动力学规律。结果表明,HZSM5/OMC吸附苯并噻吩的性能明显高于OMC。Freundlich等温模型比Langmuir等温模型更适合描述苯并噻吩在HZSM5/OMC上的吸附过程。苯并噻吩在HZSM5/OMC上的吸附是自发、吸热且混乱度增加的过程。该吸附过程符合拟二级动力学模型,吸附活化能为19.08 kJ/mol。

关键词: 复合, 吸附脱硫, 苯并噻吩, 动力学, 热力学

Abstract: The composite material HZSM5/OMC composed of zeolite HZSM5 and ordered mesoporous carbon (OMC) was synthesized. This composite and the OMC were characterized with multiple approaches including XRD, BET, FITR, SEM, TEM and NH3TPD. The characterization results showed that HZSM5/OMC has micromesoporous hierarchical pore structure; its specific surface area, pore volume, pore diameter and the acidity are all higher than those of OMC. The HZSM5/OMC was applied in the adsorption desulfurization of benzothiophene which is the main sulfur compound in the straight run diesel. Thermodynamic and kinetic results of the adsorption indicated that the desulfurization performance of the HZSM5/OMC is better than that of OMC and the adsorption data on HZSM5/OMC fits better in the Freundlich adsorption isotherm model than the Langmuir adsorption isotherm model. The adsorption process is endothermic and spontaneous. The kinetics experimental dada fits well in the pseudosecondorder reaction model. The activation energy of the adsorption of benzothiophene on HZSM5/OMC is 1908 kJ/mol.

Key words: composite, adsorption desulfurization, benzothiophene, thermodynamics, kinetics