化工进展 ›› 2022, Vol. 41 ›› Issue (1): 453-460.DOI: 10.16085/j.issn.1000-6613.2021-0331

• 资源与环境化工 • 上一篇    下一篇

废FCC催化剂在LPG吸附脱硫中的资源化利用

黄朝晖1(), 刘乃旺2()   

  1. 1.中石化镇海炼化分公司,浙江 镇海 315207
    2.华东理工大学石油加工研究所,上海 200237
  • 收稿日期:2021-02-17 修回日期:2021-05-30 出版日期:2022-01-05 发布日期:2022-01-24
  • 通讯作者: 刘乃旺
  • 作者简介:黄朝晖(1968-),男,硕士,高级工程师,研究方向为石油化工。E-mail:huangzh.zhlh@sinopec.com

Resource utilization of spent FCC catalysts in LPG adsorption desulfurization

HUANG Zhaohui1(), LIU Naiwang2()   

  1. 1.Sinopec Zhenhai Refining and Chemical Company, Zhenhai 315207, Zhejiang, China
    2.Research Institute of Petroleum Processing, East China University of Science and Technology, Shanghai 200237, China
  • Received:2021-02-17 Revised:2021-05-30 Online:2022-01-05 Published:2022-01-24
  • Contact: LIU Naiwang

摘要:

金属污染是导致流化催化裂化(FCC)催化剂失活的重要因素,充分利用沉积的重金属是废FCC催化剂资源化的关键。本文将废FCC催化剂引入到轻质油品吸附脱硫领域,以脱除液化石油气(LPG)中的二甲基二硫醚作为考核目标,验证了废FCC催化剂作为脱硫剂的可行性。除去废FCC催化剂表面积炭后,其脱硫性能得到明显改善,在常温、质量空速为4.0h-1的条件下,LPG中硫化物质量分数从382mg/m3脱除至40mg/m3。镧、铁、镍、钒、钙、锑6种金属在新鲜催化剂和焙烧后废催化剂上的总质量分数从10.2%升高至46.6%,6种金属按照对应含量分别固载在新鲜催化剂上,脱硫效果较未改性新鲜催化剂均有明显提升。验证实验表明,导致FCC催化剂失活的金属具有较高脱硫活性,废FCC催化剂作为轻质油品脱硫剂具备工业前景。

关键词: 分子筛, 失活, 吸附, 脱硫

Abstract:

Metal contamination is an important factor leading to the deactivation of fluidized bed catalytic cracking (FCC) catalyst, and making full use of the deposited heavy metals is the key to utilization the spent FCC catalyst. In this paper, the waste FCC catalyst was proposed for the adsorption desulfurization of light oil. The removal of dimethyl disulfide in LPG was taken as the target to test the feasibility of using the spent FCC catalyst as desulfurizer. After removing the deposited carbon on the spent FCC catalyst surface, the desulfurization performance was improved obviously. Under the conditions of normal temperature and mass space velocity of 4.0h-1, the sulfide mass fraction in LPG was reduced from 382mg/m3 to 40mg/m3. The total mass fraction of lanthanum, iron, nickel, vanadium, calcium and antimony was increased from 10.2% in fresh catalyst to 46.6% in the calcined spent catalyst. The desulfurization ability was significantly improved after immobilizing the six metals on fresh catalyst separately. Results showed that the metals which lead to the deactivation of FCC catalyst had high desulfurization activity, and the utilization of spent FCC catalyst in LPG adsorption desulfurization has a good industrial application prospect.

Key words: molecular sieves, deactivation, adsorption, desulfurization

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