石油炼制与化工

• 催化剂 • 上一篇    下一篇

硫化温度对MoCo/Al2O3催化剂选择性加氢脱硫的影响

赵乐平,尤百玲,庞宏   

  1. 抚顺石油化工研究院
  • 收稿日期:2011-03-02 修回日期:2011-04-23 出版日期:2011-12-12 发布日期:2011-12-12
  • 通讯作者: 赵乐平

EFFECT OF PRESULFURIZATION TEMPERATURE ON THE SELECTIVE HYDRODESULFURIZATION OF MoCo/Al2O3 CATALYST

Zhao Le-Ping,Bai-Ling You,Hong Pang   

  • Received:2011-03-02 Revised:2011-04-23 Online:2011-12-12 Published:2011-12-12
  • Contact: Zhao Le-Ping

摘要: 以FCC汽油为原料,在中型试验装置上考察230~400℃范围内硫化温度对MoCo/Al2O3催化剂加氢脱硫率及烯烃加氢饱和率、产品辛烷值损失的影响。结果表明,在反应温度260℃下,随着硫化温度的提高,加氢脱硫率由84.4%逐步提高到91.1%;在反应温度280℃下,加氢脱硫率均可维持在96.0%以上,受硫化温度的影响较小。在上述两种情况下,250℃硫化时催化剂的烯烃加氢饱和率最低,辛烷值损失最小。表明250℃下硫化充分且碳含量较少是其FCC汽油加氢脱硫选择性最好的原因。

关键词: MoCo/Al2O3催化剂, 催化裂化汽油, 预硫化, 加氢脱硫, 选择性

Abstract: The effect of presulfurization temperature(230-400℃)of MoCo/Al2O3 catalyst on its selective hydrodesulfurization(HDS) performance, such as HDS rate, hydro-saturation(HYD) rate and gasoline octane(RON) loss, was studied on a pilot plant unit using full range FCC gasoline as feed. The test results indicated that under reaction temperature of 260℃,with the increase of presulfurization temperature, the HDS rates of these catalysts increased from 84.4% to 91.1%;under reaction temperature of 280℃,the HDS rates of these catalysts were all over 96.0%,presulfurization temperature had less influence. However, in these two cases, MoCo/Al2O3 catalyst sulfurized at 250℃,exhibited the minimum HYD rate and gasoline RON loss, which indicated said catalyst possessed the best HDS selectivity. It was found that MoCo/Al2O3catalyst could be well sulfurized at 250℃ and with less coke deposit, which would be favorable to provide good HDS selectivity when treating FCC gasolien.

Key words: MoCo/Al2O3 catalyst, FCC gasoline, presulfurization, hydrodesulfurization, selectivity