Low-Medium Temperature-Selective Catalytic Reduction of NO with NH(3) 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.

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.

PMID:34963920 | PMC:PMC8697000 | DOI:10.1021/acsomega.1c04077

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