Fe-Mn-MOF-74 deNOx catalyst

Resists alkali & SO₂ co-poisoning

Incorporation of Fe into the Mn-MOF-74 framework creates bimetallic synergy that maintains stable deNOx activity under simultaneous alkali metal and SO2 poisoning, overcoming the deactivation bottleneck of current CO-SCR catalysts.

Xinyu, Niu · Yuchen, Wang · Yue, Cheng · Danya, Zhao · Wang, Xiaojing · Hao, Haigang · Zhao, Ling

Applied Catalysis A: General 2026

Specifications

NOx conversion

{'zh': '80', 'en': '80'} %

Activity enhancement factor

{'zh': '3.2', 'en': '3.2'}

Advantages

Resists co-poisoning

Fe incorporation suppresses the accumulation of inert nitrate and sulfate species via Fe-Mn synergy, keeping active sites accessible.

3.2× more active

Under identical poisoning conditions, Fe0.54-Mn0.46-MOF-74 shows a 3.2-fold higher NOx conversion than Mn-MOF-74.

Favorable pathway

DFT calculations show the N2O2 pathway has a lower energy barrier than N2O, making it thermodynamically favored.

Applications

• CO-SCR DeNOx：For CO-SCR DeNOx in flue gas containing SO2 and alkali metals, replacing poisoning-prone conventional catalysts.
• Poisoning-resistant catalysts：Maintains high activity under simultaneous alkali metal and SO2 exposure, extending catalyst lifetime.
• Industrial flue gas treatment：For industrial flue gas DeNOx, ensuring stable operation under harsh contaminant conditions.
• Catalytic flue gas purification：For catalytic flue gas purification, handling complex flue gas containing sulfur and alkali.