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Research progress on hydrothermal deactivation mechanisms of NH3-SCR catalysts and strategies to enhance their hydrothermal stabilities
| 更新时间：2026-06-29
|
Research progress on hydrothermal deactivation mechanisms of NH3-SCR catalysts and strategies to enhance their hydrothermal stabilities
- Low-Carbon Chemistry and Chemical Engineering Pages: 1-13(2026)
- 作者机构：
中石化石油化工科学研究院有限公司，北京 100083
- 作者简介：
- 基金信息：
DOI：10.12434/j.issn.2097-2547.20260136
CLC： TQ032;X511Received：23 March 2026，
Revised：2026-04-27，
Online First：26 June 2026，
- 稿件说明：
移动端阅览
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,DOI:10.12434/j.issn.2097-2547.20260136.
ZHU Ying,LI Bo.Research progress on hydrothermal deactivation mechanisms of NH3-SCR catalysts and strategies to enhance their hydrothermal stabilities[J].Low-Carbon Chemistry and Chemical Engineering,DOI:10.12434/j.issn.2097-2547.20260136.
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,DOI:10.12434/j.issn.2097-2547.20260136. DOI：
ZHU Ying,LI Bo.Research progress on hydrothermal deactivation mechanisms of NH3-SCR catalysts and strategies to enhance their hydrothermal stabilities[J].Low-Carbon Chemistry and Chemical Engineering,DOI:10.12434/j.issn.2097-2547.20260136. DOI：
Research progress on hydrothermal deactivation mechanisms of NH3-SCR catalysts and strategies to enhance their hydrothermal stabilities
摘要
在重型柴油车国六排放标准技术路线中，柴油颗粒捕集器（DPF）的主动再生会使后端的NH
3
选择性催化还原（NH
3
-SCR）催化剂处于高温水热环境中。因此，开发在该条件下综合性能稳定的催化剂具有重要的应用价值。系统综述了NH
3
-SCR催化剂的水热失活机制与稳定性提升策略。首先，聚焦分子筛催化剂，分析了水热老化导致的骨架脱铝与活性金属物种迁移聚集的协同失活机制；随后，针对金属氧化物催化剂，阐述了载体相变、活性相结晶和表面活性位点损失的热失活本质。在此基础上，从分子筛组成优化、助剂添加和骨架结构调控等方面，总结了提升水热稳定性的主要策略。最后，对未来高水热稳定性NH
3
-SCR催化剂的开发前景进行了展望。
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 (NH
3
-SCR) catalysts to a high-temperature hydrothermal environment. Therefore
developing catalyst with stable comprehensive performance under such conditions holds significant application value. The hydrothermal deactivation mechanisms and stability enhancement strategies of NH
3
-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 NH
3
-SCR catalysts with high hydrothermal stabilities in the future were prospected.
关键词
Keywords
references
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