Cyclonic gas stripping deoiling and gas flow acceleration classification for the resource utilization of spent catalysts in residue hydrotreating process

JOURNAL OF CLEANER PRODUCTION

卷:190

Article

Fu, Peng-Bo¹  Wang, Hua-Lin¹  Li, Jian-Ping¹  Huang, Yuan¹  Fang, Yi-Lin¹  Yuan, Wei¹  Fang, Xiang-Chen²  Li, Li-Quan³  Huang, Zhao-Hui⁴  Jiang, Lai⁵ 

[1] East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, 130 Meilong Rd, Shanghai 200237, Peoples R China

[2] China Petr & Chem Corp SINOPEC, Fushun Res Inst Petr & Petrochem, Fushun 113001, Liaoning, Peoples R China

[3] Luoyang Petrochem Engn Corp, SINOPEC, Luoyang 471003, Henan, Peoples R China

[4] Zhenhai Refining & Chem Co, SINOPEC, Ningbo 375299, Zhejiang, Peoples R China

[5] Jinling Petrochem Corp, SINOPEC, Nanjing 210033, Jiangsu, Peoples R China

关键词: Cyclone;    Particle self-rotation;    Spent catalyst;    Cyclone deoiling;    Catalyst classification;   

DOI  :  10.1016/j.jclepro.2018.04.203

来源: Elsevier

【 摘 要 】

The resource utilization of spent catalysts is one of the keys to enabling ebullated bed hydrotreating technology to be environmentally friendly, resource-saving and process sustainable. Spent residue hydrotreating catalysts contain a large amount of oil and highly active catalysts, if cannot be efficiently recycled will lead to waste of resources and huge catalyst consumption. In this study, the novel cyclonic gas stripping was first developed to spent catalysts deoiling, in which the removal of oil filled in the catalyst nanopores was enhanced by particle high speed self-rotation. Meanwhile, gas flow acceleration classification was developed for catalyst activity classification according to the particle density differences. This technology was successfully applied to the SINOPEC's first set of ebullated bed residue hydrotreating industrial demonstration unit, the total oil content of spent catalysts can reduce to 1.7% from 31.8%, with the deoiling efficiency reaching 96.7%. Moreover, 30% of the catalysts after deoiling were classified as highly active catalysts with lower particle density and higher pore volume. The successful implementation of this technology can reduce 25% of fresh catalyst consumption and 52% of hazardous waste discharge in residue hydrotreating process. This technique also can be extended to the resource utilization of spent catalysts in other petrochemical production. (C) 2018 Elsevier Ltd. All rights reserved.

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