低碳化学与化工2026，Vol.51Issue(8)：60-72,13.DOI:10.12434/j.issn.2097-2547.20260136
NH3-SCR催化剂水热失活机制与水热稳定性提升策略研究进展
Research progress on hydrothermal deactivation mechanisms of NH3-SCR catalysts and strategies to enhance their hydrothermal stabilities
摘要
Abstract
In the technical approach to meeting the China VI emission standards for heavy-duty diesel vehicles,the active regeneration of diesel particulate filter(DPF)subjects the downstream ammonia selective catalytic reduction(NH3-SCR)catalysts to a high-temperature hydrothermal environment.Therefore,developing catalysts with stable comprehensive performance under such conditions holds significant application value.The hydrothermal deactivation mechanisms and stability enhancement strategies of NH3-SCR catalysts were systematically reviewed.Firstly,focusing on zeolite catalysts,the synergistic deactivation mechanism caused by hydrothermal aging,which involves framework dealumination,migration and aggregation of active metal species,was analyzed.Subsequently,for metal oxide catalysts,the intrinsic thermal deactivation essence,which includes carrier phase transformation,active phase crystallization and loss of surface active sites was elucidated.Based on this,the main strategies for enhancing hydrothermal stability were summarized,including zeolite composition optimization,additive addition and framework structure regulation.Finally,the development prospects of NH3-SCR catalysts with high hydrothermal stabilities in the future were discussed.关键词
NH3选择性催化还原/水热稳定性/分子筛催化剂/金属氧化物催化剂Key words
NH3 selective catalytic reduction/hydrothermal stabilities/zeolite catalysts/metal oxide catalysts分类
化学化工引用本文复制引用
朱莹,李博..NH3-SCR催化剂水热失活机制与水热稳定性提升策略研究进展[J].低碳化学与化工,2026,51(8):60-72,13.基金项目
中石化石油化工科学研究院有限公司院控课题(PR20232142). （PR20232142）
