Yuan Chengyuan, Chen Qiang, Li Zhongfu, Zhang Jingyan, Liu Conghua
School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, China.
Shanxi Tengmao Technology Co., Ltd., Hejin 043300, China.
Molecules. 2024 Feb 22;29(5):962. doi: 10.3390/molecules29050962.
Regeneration has been considered as an ideal way for the post-treatment of waste FCC catalyst (ECat). In this work, the degeneration mechanism of ECat was firstly researched and attributed to the increasing of strong acid sites accessibility of ECat in contrast with fresh FCC catalyst by adsorption FTIR. Based on the proposed degeneration mechanism, ECat was successfully regenerated through suitable weakening for strong acid sites by boron modification. Characterization and evaluation results suggested that, the strong acid sites of regenerated ECat (R-ECat) were apparently decreased by boron modification which had significantly improve the heavy oil catalytic cracking performance of R-ECat. Because of the excellent performance, R-ECat in this work could successfully substitute for partial fresh FCC catalyst in FCC unit, which would provide a practicable way for the reutilization of ECat.
再生被认为是废催化裂化催化剂（ECat）后处理的理想方式。在本工作中，首先研究了ECat的失活机理，通过吸附傅里叶变换红外光谱（FTIR）发现，与新鲜催化裂化催化剂相比，ECat的强酸位点可及性增加导致了其失活。基于所提出的失活机理，通过硼改性对强酸位点进行适当弱化，成功实现了ECat的再生。表征和评价结果表明，硼改性明显降低了再生ECat（R-ECat）的强酸位点，显著提高了R-ECat的重油催化裂化性能。由于性能优异，本工作中的R-ECat能够成功替代催化裂化装置中的部分新鲜催化裂化催化剂，这将为ECat的再利用提供一条可行的途径。
