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›› 2012, Vol. 12 ›› Issue (2): 187-193.

• 反应与分离 • 上一篇    下一篇

浆态体系中吲哚对NiMo/g-Al2O3加氢脱硫性能的影响

李维昆 项海定 王铁峰   

  1. 清华大学化工系绿色反应工程与工艺北京市重点实验室 清华大学化工系绿色反应工程与工艺北京市重点实验室 清华大学化工系
  • 收稿日期:2012-03-14 修回日期:2012-04-05 出版日期:2012-04-20 发布日期:2012-04-20
  • 通讯作者: 王铁峰

Effect of Indole on Hydrodesulfurization Performance of NiMo/g-Al2O3 Catalyst in a Slurry System

LI Wei-kun XIANG Hai-ding WANG Tie-feng   

  1. Beijing Key Laboratory of Green Reaction Engineering and Technology Department of Chemical Engineering, Tsinghua University Beijing Key Laboratory of Green Reaction Engineering and Technology Department of Chemical Engineering, Tsinghua University Department of Chemical Engineering, Tsinghua University
  • Received:2012-03-14 Revised:2012-04-05 Online:2012-04-20 Published:2012-04-20
  • Contact: WANG Tie-feng

摘要: 以二苯并噻吩为模型化合物,在浆态反应釜中考察了吲哚对NiMo/g-Al2O3催化剂加氢脱硫性能的影响. 用微库仑仪、气相色谱-质谱联用仪对反应中的样品进行含硫量和组分分析,并对反应前后的催化剂进行性能表征. 结果表明,加入吲哚在一定程度上提高了活化阶段的反应速率,但显著降低了活化后的反应速率,导致加氢脱硫总体活性显著下降,脱硫率由70%降到约58%. 反应前后催化剂表面形貌和活性相晶体结构均无明显变化,但比表面积有所增加. 加入吲哚导致催化剂孔径减小约12%,积碳量增加约50%. 组分分析表明,加入吲哚后反应中生成的环己基苯显著减少,加氢路径受到抑制.

关键词: 二苯并噻吩, 加氢脱硫, 吲哚, NiMo/g-Al2O3, 浆态体系

Abstract: Hydrodesulfurization (HDS) performance of the presulfurized hydrogenation catalyst NiMo/g-Al2O3 was studied using dibenzothiophene (DBT) as model compound with and without addition of 1000 mg/L indole (based on N) under 300℃ and 4.5 MPa. Sulfur content and species concentration were measured using micro-coulometric analyzer and gas chromatography-mass spectrometry, respectively. The fresh and used catalysts were characterized by BET, XRD, TEM, TPD and TGA. The results showed that the addition of indole slightly increased the reaction rate in the activation period, but significantly decreased the rate in the subsequent stable reaction period, leading to an overall decrease in desulfurization rate from 70% to 58%. The used catalyst did not change in surface topography and crystalline structure compared with the fresh catalyst, but showed an increase in specific surface area. The addition of indole caused 12% decrease in the catalyst pore size and 50% increase in coke formation, and significantly deceased the production of cyclohexyl benzene, indicating that the hydrogenation desulphurization route was suppressed.

Key words: dibenzothiophene, hydrodesulfurization, indole, NiMo/g-Al2O3, slurry system

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