化工进展2024，Vol.43Issue(z1)：640-649,10.DOI:10.16085/j.issn.1000-6613.2024-0504
铝基废催化剂载体的回收与再生制备
Recovery and regeneration preparation of aluminum-based spent catalyst support
摘要
Abstract
Aluminum-based catalyst is the most demanding and widely used catalyst in petroleum refining industry.The comprehensive economic benefits of industrial catalytic process can be greatly improved by recycling the discarded aluminum-based spent catalyst support that can not be used any more.In this study,the aluminum support from spent Pt-Sn/Al2O3 catalyst was recovered by"sodium roasting-weak alkaline leaching"to obtain NaAlO2 solution,and NaAlO2 was prepared into mesoporous alumina with high specific surface area and large pore volume by reverse precipitation.By changing the parameters such as roasting temperature,mass ratio of raw materials and leaching pH,the leaching rate of aluminum was optimized.Under the conditions of roasting temperature of 450℃,mass ratio of 1.2 and leaching pH of 8.5,the leaching rate of aluminum could reach 99.9％.Mesoporous alumina was prepared from recovered NaAlO2 solution,and prepared samples were characterized by X-ray diffraction(XRD),Brunner-Emmet-Teller(BET)and particle size analyzer.The results show that under the conditions of calcination temperature of 500℃,aging time of 12h and reaction pH of 10,the specific surface area of mesoporous alumina synthesized is 284.19m2/g,the pore volume is 0.47cm3/g,and the average pore diameter is 6.65nm.The pore size distribution is uniform and the particle uniformity is good.The specific surface area and particle size of the regenerated alumina meet the national standard of alumina(GB/T24487-2022).关键词
催化剂载体/弱碱性浸出/偏铝酸钠/反沉淀法/再生/氧化铝/理化指标调控Key words
catalyst support/weak alkaline leaching/NaAlO2/inverse precipitation method/regeneration/alumina/physical and chemical index regulation分类
资源环境引用本文复制引用
李琳,顾斌涛,张袁华,刘斌,王才平,潘剑明,徐泽良,王翀,王珂,黄国勇,徐盛明,郁丰善,翁雅青,曹才放,温嘉玮,王春霞,王俊莲..铝基废催化剂载体的回收与再生制备[J].化工进展,2024,43(z1):640-649,10.基金项目
国家重点研发计划(2021YFC2901100) （2021YFC2901100）
国家自然科学基金(52274307) （52274307）
中国石油大学科学基金(2462021QNX2010) （2462021QNX2010）
重油加工国家重点实验室(HON-KFKT2022-10). （HON-KFKT2022-10）
