Citation: ZHUANG Ke, ZHANG Ya-ping, HUANG Tian-jiao, LU Bin, SHEN Kai. Sulfur-poisoning and thermal reduction regeneration of holmium-modified Fe-Mn/TiO₂ catalyst for low-temperature SCR[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(11): 1356-1364. shu

Sulfur-poisoning and thermal reduction regeneration of holmium-modified Fe-Mn/TiO₂ catalyst for low-temperature SCR

1.
State Power Environmental Protection Research Institute, Nanjing 210031, China
2.
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

Corresponding author: ZHANG Ya-ping, amflora@seu.edu.cn
Received Date: 17 May 2017
Revised Date: 10 August 2017

Fund Project: The project was supported by the Key Research Program of Jiangsu Province(BE2015677)and Environmental Nonprofit Industry Research Subject(2016YFC0208102)Environmental Nonprofit Industry Research Subject 2016YFC0208102the Key Research Program of Jiangsu Province BE2015677

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The effect of SO₂ on the low-temperature SCR activity and the thermal reduction regeneration for holmium-modified Fe-Mn/TiO₂ catalyst were investigated by activity assessment and various characterization methods. The deposition of ammonium sulfate ((NH₄)₂SO₄) on catalyst surface and the sulfuration of active component (MnSO₄) were proved to be the main causes for the deactivation in the presence of SO₂. The catalyst Fe_0.3Ho_0.1Mn_0.4/TiO₂ exhibited superior SO₂ durability when the concentration of SO₂ was lower than 0.04%, and the catalytic activity could markedly recover with the termination of sulfur-poisoning source. The deactivation behavior was irreversible when the concentration of SO₂ was increased to 0.1% but the poisoned catalyst could be regenerated after thermal reduction (350 ℃) for 60 min by 5% NH₃. The microstructure and physicochemical properties could be significantly restored after the thermal reduction regeneration. Moreover, the NO_x conversion could return to about 80%.
- SCR,
- denitration,
- low-temperature,
- thermal reduction regeneration,
- (NH₄)₂SO₄
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Sulfur-poisoning and thermal reduction regeneration of holmium-modified Fe-Mn/TiO2 catalyst for low-temperature SCR

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通讯作者: 陈斌, bchen63@163.com

Sulfur-poisoning and thermal reduction regeneration of holmium-modified Fe-Mn/TiO₂ catalyst for low-temperature SCR