摘要
FCC催化剂在使用过程中,碳及重金属逐渐积累并沉积在催化剂孔隙中,占据活性位点,严重影响催化裂化产品质量。采用超声波辅助强化复活的方式对FCC废催化剂进行研究,通过考察不同复活剂、焙烧温度以及超声波时间等条件对催化剂性能指标的影响,得出以下结论:所研究的燕山FCC废催化剂在经过高温焙烧采用去离子水超声后微反活性均能提高,在采用700℃(即再生温度)焙烧,80℃去离子水超声45min处理后有2.38%的钒脱出,催化活性提高3~6个百分点且样品稳定性高;经超声波复活样品的催化剂形貌、磨耗、Y型分子筛结晶度与未处理的废催化剂相比基本没有变化,但经过ACE评价后转化率提高了1.3%,尤其是乙烯、丙烯等收率提高较为明显。此复活方式对工业装置要求低,在保证有效提高微反活性的同时对环境更加有益。
During the use of FCC catalysts,carbon and heavy metals gradually accumulate and deposit in the pores of the catalysts and occupy the active site,seriously affecting the quality of FCC products.Ultrasonic assisted enhanced reactivation was used to study the spent FCC catalyst.By investigating the influence of dif-ferent reactivating agents,calcination temperature,ultrasonic time and other conditions on the performance indexes of the catalyst,it was concluded that the micro reactivity of the spent FCC catalysts in Yanshan was improved through high temperature calcination and ultrasonic treatment with deionized water.After calcination at 700℃ and ultrasonic treatment with deionized water at 80 ℃ for 45 min,2.38% of the vanadium was removed,the catalytic activity was improved by 3 ~6 percentage points and the stability of the samples was high.The morphology,attrition and crystallinity of Y zeolite of the ultrasonic reactivated catalysts samples re-mained basically unchanged compared with the untreated spent catalysts,but the conversion rate was increased by 1.3% after the ACE evaluation,especially the yields of ethylene and propylene were increased significantly.This reactivation method has low requirements for industrial equipment and is more beneficial to the environment while ensuring the effective improvement of microreactivity.
作者
吕岩
Lv Yan(Engineering Technology Research Institute of SINOPEC Catalyst Ltd.,Beijing 101111)
出处
《中外能源》
2021年第8期72-77,共6页
Sino-Global Energy
关键词
FCC废催化剂
复活
超声波
再生
ACE评价
spent FCC catalyst
reactivation
ultrasonic wave
regeneration
ACE evaluation
