摘要
锰(Mn)基催化剂在氨选择性催化还原(NH_(3)-SCR)领域虽具有良好的低温活性,但容易受到二氧化硫和水蒸气的影响。研究发现调整催化剂的结构形貌可以有效提升催化剂的抗硫抗水性能。因此,本文综述了核壳结构、中空结构、三维有序孔道结构和二维层状结构Mn基催化剂在低温NH_(3)-SCR抗硫抗水领域的研究进展,简要阐述了Mn基催化剂硫水中毒机理,并结合中毒机理与结构特点分析了结构在提升Mn基催化剂抗性方面起到的作用。此外,本文还总结了以上四种结构催化剂的制备方法,并指出结构催化剂未来工业化制备的发展方向。同时,对今后研究工作进行展望,提出深入研究协同中毒机理、模拟优化催化剂配方等建议,为实现Mn基催化剂的高抗性及工业化应用提供了借鉴。
For ammonia selective catalytic reduction(NH_(3)-SCR),the Mn-based catalysts have good lowtemperature catalytic activity,but they are susceptible to SO2and H2O.Adjusting the structural and morphology of the catalysts can effectively improve their sulfur and water resistance.Therefore,this review summarizes the research progress of Mn-based catalysts with different structures of core-shell,hollow,three-dimensional ordered porous and two-dimensional layered structure,for the sulfur and water resistance.The mechanisms of sulfur and water poisoning of Mn-based catalysts are briefly described.The effect of structure on the resistance enhancement of Mn-based catalysts is also analyzed based on the combination of poisoning mechanism and structural characteristics.This review also summarizes the preparation methods of the above four structural catalysts,and points out the development direction of industrial preparation of structural catalysts in the future.At the same time,the future research work is prospected.Suggestions such as in-depth study of synergistic poisoning mechanism,optimization of catalysts formulation via simulation are put forward,which could provide reference for improving Mn-based catalysts’resistance and industrial preparation.
作者
李钊铭
沈伯雄
封硕
边瑶
LI Zhaoming;SHEN Boxiong;FENG Shuo;BIAN Yao(School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China;School of Chemical Engineering,Hebei University of Technology,Tianjin 300401,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2023年第1期226-235,共10页
Chemical Industry and Engineering Progress
基金
国家自然科学基金区域联合重点(U20A20302)
河北省创新群体(E2021202006)
天津科技专项(19ZXSZSN00050,19ZXSZSN00070)
河北省科技专项(20373701D)
河北省重大成果转化(21283701Z)。
关键词
选择催化还原
失活
制备
结构
Mn催化剂
抗硫抗水
SCR
deactivation
preparation
structure
Mn-based catalyst
resistance to SO_(2)and H_(2)O
