Citation: LI Yan, HUANG Jun, LIN Fa-wei, SHAO Jia-ming, WANG Zhi-hua, XIANG Bai-xiang. Study on the activity and mechanism of selective catalytic reduction of NO with NH₃ over Mn_αTi_1-α catalyst at medium-low temperatures[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(1): 91-99. shu

Study on the activity and mechanism of selective catalytic reduction of NO with NH₃ over Mn_αTi_1-α catalyst at medium-low temperatures

1.
Shenhua Guohua(Beijing) Electric Power Research Institute Co., Ltd., Beijing 100025, China
2.
School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
3.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Corresponding author: HUANG Jun, 21027076@zju.edu.cn
Received Date: 13 August 2019
Revised Date: 15 November 2019

Fund Project: The project was supported by the National Basic Research Program of China (2018YFB0604203)the National Basic Research Program of China 2018YFB0604203

Figures(10)

Mn_αTi_1-α catalysts for selective catalytic reduction (SCR) of NO were prepared with impregnation method and their denitration activity and SO₂ resistance at medium-low temperature were evaluated. The catalysts were characterized using BET, XRD, XPS, NH₃-TPD and H₂-TPR. The results showed that the temperature range of the highest denitration activity of Mn_αTi_1-α catalyst shifted to the lower temperature zone along with the increase of MnO_x loading. The denitration efficiency of Mn_0.1Ti_0.9 catalyst reached over 80% at 200-385 ℃. SO₂ could bring down denitration activity of Mn_αTi_1-α catalyst greatly and resulted in irreversible deactivation. The specific surface area of the catalyst first increased then slightly decreased with the increase of Mn_x loading. Both Mn⁴⁺ peak area in H₂-TPR and surface chemical adsorbed oxygen increased along with the increase of MnO_x loading. All these factors were beneficial to the proceeding of NH₃-SCR reaction at low temperature. With the increase of MnO_x loading, the acid sites of Mn_αTi_1-α catalyst increased and the reduction peak at low temperature appeared, indicating that Mn_αTi_1-α catalyst had good redox performance at medium and low temperature.
- selective catalytic reduction,
- MnO_x,
- medium-low temperature SCR,
- NH₃ reduction,
- SO₂ resistance
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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Study on the activity and mechanism of selective catalytic reduction of NO with NH3 over MnαTi1-α catalyst at medium-low temperatures

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通讯作者: 陈斌, bchen63@163.com

Study on the activity and mechanism of selective catalytic reduction of NO with NH₃ over Mn_αTi_1-α catalyst at medium-low temperatures