催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (9): 921-927.

• 研究论文 • 上一篇    下一篇

硫代硫酸铵预硫化的MoO3/Al2O3催化剂的活化和加氢脱硫活性

葛晖1,2,李学宽1,王建国1,秦张峰1,吕占军1,杨英1   

  1. 1 中国科学院山西煤炭化学研究所, 山西太原 030001; 2 中国科学院研究生院, 北京 100049
  • 收稿日期:2008-09-25 出版日期:2008-09-25 发布日期:2012-07-19

Activation and Hydrodesulfurization Activity of MoO3/Al2O3 Catalyst Presulfided by Ammonium Thiosulfate

GE Hui1,2, LI Xuekuan1*, WANG Jianguo1, QIN Zhangfeng1, L Zhanjun1, YANG Ying1   

  1. 1 Institute of Coal Chemistry, The Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-09-25 Online:2008-09-25 Published:2012-07-19

PDF

924

被引次数

20

摘要： 以硫代硫酸铵为硫化剂对MoO3/Al2O3催化剂进行预硫化,考察了制备方法和活化条件对预硫化催化剂噻吩加氢脱硫活性的影响. 结果表明,硫代硫酸铵预硫化的催化剂活化后,加氢脱硫活性好,噻吩的转化率达到99%以上,而二甲基二硫硫化的MoO3/Al2O3催化剂在相同条件下,噻吩转化率只有92%. 合适的活化温度为200～300 ℃, 活化压力增加有利于预硫化催化剂的还原硫化和加氢脱硫活性的提高. 硫代硫酸铵预硫化催化剂的高脱硫活性主要归因于多层的Ⅱ型MoS2活性相的形成,其次是硫化程度的提高. 硫代硫酸铵预硫化催化剂经过氢气活化和补充硫化两个阶段,其硫化程度高于传统方法硫化的催化剂.

关键词: 氧化钼, 硫代硫酸铵, 预硫化, 活化, 噻吩, 加氢脱硫

Abstract: The MoO3/γ-Al2O3 catalyst presulfided by ammonium thiosulfate exhibite d higher activity than by dimethlydisulfide. It was attributed to the formation of active type Ⅱ MoS2 phase and the increase of sulfidation degree in (NH4) 2S2O3 presulfided catalysts. The interaction of Mo with support in (NH4) 2 S2O3 presulfided catalysts was depressed by the sulfate species, which is a derivative of (NH4)2S2O3.

Key words: molybdenum oxide, ammonium thiosulfate, presulfidation, activation, thiophene, hydrodesufurization