石油化工2026，Vol.55Issue(1)：57-62,6.DOI:10.3969/j.issn.1000-8144.2026.01.008
废弃选择性催化还原脱硝催化剂的再生
Regeneration of waste selective catalytic reduction denitration catalyst
摘要
Abstract
This study focused on the regeneration of a waste selective catalytic reduction denitration catalyst from a refinery's catalytic cracking unit after four years of operation.The regeneration process included dust blowing,ultrasonic water washing,and acid washing.The characterization of the fresh,waste,and regenerated catalysts was performed using XRD,N2 adsorption-desorption,XRF,and NH3-TPD techniques.Their denitration performance was evaluated using a laboratory microreactor system.The results indicate that pore blockage,reduction of acidic sites,and loss of active components are the primary causes of catalyst deactivation.After dust blowing and ultrasonic water washing,acid washing with 0.8 mol/L H2SO4 yields the best regeneration.The regenerated catalyst exhibits a broadened operating temperature window 290-380℃compared to the waste one 290-310℃.NO conversion exceeds 95%,and it demonstrates excellent sulfur resistance.关键词
选择性催化还原/脱硝催化剂/催化剂再生/超声/酸洗Key words
selective catalytic reduction/denitration catalyst/catalyst regeneration/ultrasonic/acid washing分类
化学化工引用本文复制引用
蒲欣,冯小童,巫树锋,刘兴誉,唐中华,杨岳..废弃选择性催化还原脱硝催化剂的再生[J].石油化工,2026,55(1):57-62,6.基金项目
中国石油科学研究与技术开发项目(2023DJ6908). （2023DJ6908）
