Review on manganese based catalysts resistant to H2O and SO2 for SCR reduction at low temperature

doi:10.16085/j.issn.1000-6613.2017.03.022

Abstract

Abstract:

Manganese-based catalysts are widely used in NH₃-SCR reduction owing to their excellent catalytic performance at low temperature. However,H₂O and SO₂ will cause server catalyst deactivation, thus it is necessary to develop the catalysts resistant to H₂O and SO₂. This study mainly summarizes the deactivation mechanism of H₂O and SO₂,and reviews some compound catalysts such as Mn-Fe,Mn-Ce, Mn-Sm,Mn-Sn,and supported catalysts with both conventional carrier like TiO₂ and Al₂O₃ and metal modifying carrier like Fe-Ti and Ce-Zr. The catalysts with special construction for instance MnO₂@NiCo₂O₄ core-shell structure and Mn_xCo_3-xO₄ regular nanocage-shape structure are also discussed. The superiority and inferiority of each kind catalyst are introduced and the possible research directions in future are proposed as to optimize the preparation method of the metal doped catalyst or add new effective additives to reduce the working temperature of the supported catalyst while ensure high resistance to H₂O and SO₂,and to explore the large-scale preparation method for special structured catalysts.

Key words: selective catalytic reduction(SCR), denitration, Mn-based catalyst, low-temperature, resistance to H₂O and SO₂

摘要：

Mn基催化剂因具备良好的催化性能而广泛应用于低温NH₃-SCR脱硝研究领域，然而烟气中存在的H₂O、SO₂会导致催化剂较严重地失活，故研究低温Mn基催化剂的抗H₂O、抗SO₂性能十分必要。本文主要阐释了H₂O、SO₂的作用机理，详细归纳了抗H₂O、抗SO₂效果较好的Fe、Ce、Sm、Sn等金属掺杂型、Mn-Ce/TiO₂等常规载体及Mn/Fe-Ti等复合载体构成的负载型、Fe₂O₃@MnO_x@CNTs等核壳结构型和Mn_xCo_3-xO₄纳米笼等规则结构型组成的特殊结构型Mn基催化剂，简要总结了各类催化剂的现阶段研究进展和局限，并提出各类型催化剂的未来可能研究方向为优化金属掺杂催化剂的制备方法或添加新型有效助剂，保证高抗性前提下进一步降低载体型催化剂的工作区间以及批量化制备特殊结构型催化剂。

关键词: 选择催化还原, 脱硝, Mn基催化剂, 低温, 抗H₂O、抗SO₂

CLC Number:

LI Chenlu, TANG Xiaolong, YI Honghong, GAO Fengyu, LI Jingying, CHU Chao, ZHANG Runcao. Review on manganese based catalysts resistant to H₂O and SO₂ for SCR reduction at low temperature[J]. Chemical Industry and Engineering Progress, 2017, 36(03): 934-943.

李晨露, 唐晓龙, 易红宏, 高凤雨, 李婧颖, 储超, 张润草. Mn基低温SCR催化剂的抗H₂O、抗SO₂研究进展[J]. 化工进展, 2017, 36(03): 934-943.

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Review on manganese based catalysts resistant to H₂O and SO₂ for SCR reduction at low temperature

Mn基低温SCR催化剂的抗H₂O、抗SO₂研究进展

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