Low-Medium Temperature-Selective Catalytic Reduction of NO with NH3 over a Mn/Co-MOF-74 Catalyst

Zhonghao Sun; Xue Mi; Yichen Luo; Siyuan Wang; Bo Yuan; Runlong Hao; Yi Zhao

doi:10.1021/acsomega.1c04077

Low-Medium Temperature-Selective Catalytic Reduction of NO with NH₃ over a Mn/Co-MOF-74 Catalyst

ACS Omega. 2021 Dec 7;6(50):34347-34358. doi: 10.1021/acsomega.1c04077. eCollection 2021 Dec 21.

Authors

Zhonghao Sun¹, Xue Mi¹, Yichen Luo¹, Siyuan Wang¹, Bo Yuan¹, Runlong Hao¹, Yi Zhao¹

Affiliation

¹ School of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, People's Republic of China.

Abstract

To realize the selective catalytic reduction of NO at low-medium temperatures and avoid secondary pollution, a highly active catalyst Mn/Co-MOF-74 was synthesized. X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetric analysis, Brunauer-Emmett-Teller method, and scanning electron microscopy were employed to analyze the physicochemical properties of catalysts with different Mn/Co molar ratios and conjecture about the difference in the catalytic activity. Meanwhile, the effects of the molar ratio of Mn/Co, catalyst dosage, catalyst synthesis conditions, GHSV, and temperature on the NO conversion efficiencies were investigated and found that an optimal NO conversion efficiency of 93.5% was obtained at 200-225 °C. In the end, the stability of Mn/Co-MOF-74 was investigated and found that the catalyst has better sulfur and water resistance, and the NO conversion mechanism was speculated on the basis of characterizations and literature data.