文献类型：期刊文献

英文题名：Influences of regeneration atmospheres on structural transformation and renderability of fluidized catalytic cracking catalyst

作者：Zhang, Haigang[1,2];Shen, Zhongjie[1,2];Gong, Jianhong[3];Liu, Haifeng[1,2]

机构：[1]East China Univ Sci & Technol, Natl Energy Coal Gasificat Technol Res & Dev Ctr, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, Shanghai 200237, Peoples R China;[3]Sinopec Res Inst Petr Proc, Beijing 100083, Peoples R China

年份：2023

卷号：63

起止页码：71

外文期刊名：CHINESE JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20234414992853);WOS:【SCI-EXPANDED(收录号:WOS:001102197100001)】；

基金：Acknowledgements This study is supported by the National Natural Science Founda-tion of China (21908063) , the Shanghai Pujiang Program (21PJ1402300) , the Fundamental Research Funds of the Central Universities (JKB01211715 and JKB01221677) .

语种：英文

外文关键词：Fluidized catalytic cracking; Coke deposit; Regeneration; Pore structure; Gasification and combustion

摘要：The regeneration of fluidized catalytic cracking (FCC) catalysts is an essential process in petroleum processing. The current study focused the regeneration reaction characteristics of spent fluidized catalytic cracking catalyst (SFCC) at different atmospheres with influences on pore evolution and activity, for a potential way to reduce emission, produce moderate chemical product (CO), and maintain catalyst activity. The results show that regeneration in air indicates a satisfaction on removing coke on the catalyst surface while giving a poor effect on eliminating the coke inside micropores. This is attributed that the combustion in air led to a higher temperature and further transformed kaolinite phase to silicaaluminum spinel crystals, which tended to collapse and block small pores or expand large pores, with similar results observed in pure O2 atmosphere. Nevertheless, catalysts regenerated in O2/CO2 diminished the combustion damage to the pore structure, of which the micro porosity after regeneration increased by 32.4% and the total acid volume rose to 27.1%. The regeneration in pure CO2 displayed low conversion rate due to the endothermic reaction and low reactivity. The coexistence of gasification and partial oxidation can promote regeneration and maintain the original structure and good reactivity. Finally, a mechanism of the regeneration reaction at different atmospheres was revealed. (c) 2023 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.