石油炼制与化工 ›› 2016, Vol. 47 ›› Issue (8): 13-19.

• 催化剂 • 上一篇    下一篇

La对CoMo/γ-Al2O3催化剂选择性加氢脱硫性能的影响

于沛1,柯明1,李建鹏2,胡海强1   

  1. 1. 中国石油大学(北京)重质油国家重点实验室
    2. 中国石化金陵分公司
  • 收稿日期:2016-04-13 修回日期:2016-04-28 出版日期:2016-08-12 发布日期:2016-07-26
  • 通讯作者: 柯明 E-mail:keming@cup.edu.cn

EFFECT OF La ON SELECTIVE HYDRODESULFURIZATION PERFORMANCE OF CoMo/γ-Al2O3 CATALYST

  • Received:2016-04-13 Revised:2016-04-28 Online:2016-08-12 Published:2016-07-26

摘要:

制备了CoMo/La2O3-Al2O3选择性加氢脱硫催化剂,通过BET、XRD、H2-TPR、XPS对催化剂进行表征,并在固定床连续微型反应装置上考察了La2O3含量对催化剂活性的影响。结果表明:La2O3与Al2O3结合形成LaAl2O3化合物,使载体表面孔结构发生改变。同时,La的引入可以改善活性组分与载体之间的相互作用,有利于金属活性组分的还原,提高了Mo的硫化程度。当La2O3质量分数为1.0%时,催化剂有最佳的选择性加氢脱硫活性,在处理FCC汽油重馏分(>65 ℃馏分)时可将其硫含量降至11.2 μg/g-1,RON损失1.1个单位。与碱洗轻馏分调合后,产品中硫含量为9.0μg/g-1,RON损失0.8个单位。

关键词: 选择性加氢脱硫, 催化剂, 载体,

Abstract:

The CoMo/La2O3-Al2O3 selective hydrodesulfurization catalysts were prepared and characterized by BET, XRD, H2-TPR, XPS and TEM. Then the HDS performance of the catalysts was evaluated in a continuous flow fixed-bed micro-reactor. The results show that the addition of suitable content La can weaken the interaction between support and active component, facilitate the reduction of active component and the sulfidation of Mo, and is beneficial to the formation of CoMoS phase. The catalyst with 1.0% La2O3 shows the optimal selective HDS activity. With an FCC gasoline as the feed, the sulfur content in the heavy fractions (>65 ℃) can be reduced to 11.2 μg/g from 120.8 μg/g and the research octane number (RON) loss is 1.1. After blending with caustic-treated light fraction, the sulfur content in product gasoline is 9.0 μg/g and the RON loss is 0.8.

Key words: selective hydrodesulfurization, catalyst, support, lanthanum