分子筛与介孔碳复合型直馏柴油吸附脱硫材料

发布时间：2018-02-26 23:18

本文关键词： 复合吸附脱硫苯并噻吩动力学热力学　出处：《石油学报(石油加工)》2017年06期 　论文类型：期刊论文

【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NH3-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19.08kJ/mol。
[Abstract]:HZSM-5 / OMC was prepared by combining molecular sieve HZSM-5 with ordered mesoporous carbon monoxide (OMC). HZSM-5/OMC and OMC were characterized by XRDX BET-FI-TRMO-SEMX TEM and NH3-TPD. The results show that HZSM-5 / OMC has micromesoporous structure, specific surface area, pore volume, and so on. The pore size and acidity of HZSM-5/OMC were higher than those of OMC. The adsorption and desulfurization properties of HZSM-5/OMC were investigated by using benzothiophene, the main sulfide of straight-run diesel oil, as probe molecule. The thermodynamics and kinetics of benzothiophene adsorption by HZSM-5/OMC were studied. The results show that the adsorption property of benzothiophene by HZSM-5 / OMC is better than that by OMC.Freundlich isotherm than that by Langmuir isotherm. Benzo is suitable for describing the adsorption process of benzothiophene on HZSM-5/OMC. The adsorption of thiophene on HZSM-5/OMC is spontaneous. The adsorption process accords with the pseudo-second-order kinetic model and the adsorption activation energy is 19.08 kJ / mol.
【作者单位】：辽宁石油化工大学石油化工学院;
【基金】：辽宁省教育厅项目(L2016018,L2015296,LJQ2015062) 抚顺市科技计划项目(FSKJHT201376)资助
【分类号】：TE624.55;TQ424

【相似文献】