中国炼油与石油化工 ›› 2022, Vol. 24 ›› Issue (1): 90-99.

• Process Research • 上一篇    下一篇

多环芳烃对柴油超深度加氢脱硫催化剂运行稳定性的影响

丁石,葛泮珠,张锐,习远兵,张乐,李大东,聂红   

  1. 中国石化石油化工科学研究院
  • 收稿日期:2021-07-29 修回日期:2021-12-17 出版日期:2022-03-30 发布日期:2022-03-30
  • 通讯作者: 葛泮珠 E-mail:gepzhu.ripp@sinopec.com
  • 作者简介:2021-12-30

Effect of polycyclic aromatic hydrocarbons on the stability of the catalyst for the production of diesel with ultra-low sulfur content

Ding Shi1,Pan-Zhu GE2,Zhang Rui1,Xi Yuanbing3,Zhang Le4,Li Dadong1,Nie Hong4   

  1. 1.
    2. RIPP
    3. Research Inistitute of Petroleum Processing, SINOPEC
    4. SINOPEC Research Institute of Petroleum Processing
  • Received:2021-07-29 Revised:2021-12-17 Online:2022-03-30 Published:2022-03-30
  • Contact: Pan-Zhu GE E-mail:gepzhu.ripp@sinopec.com

摘要: The effect of polycyclic aromatic hydrocarbons (PAHs) on the stability of the hydrogenation catalyst for production of ultra-low sulfur diesel was studied in a pilot plant using Ni-Mo-W/γ-Al2O3 catalyst. The mechanisms of catalyst deactivation were analyzed by the methods of elemental analysis, nitrogen adsorption-desorption, thermogravimetry-mass spectrometry (TG-MS) technology, X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM). The results demonstrated that PAHs had little effect on the activity of catalyst at the beginning of operation, during which the reaction temperature was increased by only 1 — 4 ℃. However, the existence of PAHs significantly accelerated the deactivation of catalyst and weakened the stability of catalyst. This phenomenon could be explained by that the catalyst deactivation is not only related to the formation of carbon deposit, but also is closely related to the loss of pore volume and the decrease of Ni-W-S phase ratio after adding PAHs.

关键词: 超深度加氢脱硫柴油, 催化剂失活, 多环芳烃

Abstract: The effect of polycyclic aromatic hydrocarbons (PAHs) on the stability of the hydrogenation catalyst for production of ultra-low sulfur diesel was studied in a pilot plant using Ni-Mo-W/γ-Al2O3 catalyst. The mechanisms of catalyst deactivation were analyzed by the methods of elemental analysis, nitrogen adsorption-desorption, thermogravimetry-mass spectrometry (TG-MS) technology, X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM). The results demonstrated that PAHs had little effect on the activity of catalyst at the beginning of operation, during which the reaction temperature was increased by only 1 — 4 ℃. However, the existence of PAHs significantly accelerated the deactivation of catalyst and weakened the stability of catalyst. This phenomenon could be explained by that the catalyst deactivation is not only related to the formation of carbon deposit, but also is closely related to the loss of pore volume and the decrease of Ni-W-S phase ratio after adding PAHs.

Key words: ultra-low sulfur diesel, catalyst deactivation, polycyclic aromatic hydrocarbons