Single-phase SO2-resistant to poisoning Co/Mn-MOF-74 catalysts for NH3-SCR

• Published in: Catalysis communications Vol. 113; pp. 46 - 50
• Main Authors: Jiang, Haoxi, Niu, Ying, Wang, Qianyun, Chen, Yifei, Zhang, Minhua
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 10.07.2018
• Subjects: Co/Mn-MOF-74; DeNOx; Metal-organic framework; Selective catalytic reduction (SCR); SO2-resistant catalyst; Selective catalytic reduction (SCR); Metal-organic framework; DeNOx; SO2-resistant catalyst; Co/Mn-MOF-74
• ISSN: 1566-7367; 1873-3905
• DOI: 10.1016/j.catcom.2018.05.017

Single-phase Co/Mn-MOF-74 solid materials were synthesized successfully via the hydrothermal method. The effect of Co/Mn atom ratio on the structure of Co/Mn-MOF-74 solids and their catalytic activity for low-temperature NH3-SCR of NOx were investigated. Very high NO conversion values (>96.0%) at 180–240 °C were obtained using the Mn0.66Co0.34-MOF-74 chemical composition (optimal content of Co). Furthermore, Mn0.66Co0.34-MOF-74 showed outstanding resistance to SO2 poisoning and the incorporation of Co was shown to cause the weakening of the SO2 adsorption strength on the catalyst surface, thus to enhance catalyst's SO2 resistance to poisoning. These features were probed by in situ DRIFTS and catalytic performance studies. The present work suggests that Mn0.66Co0.34-MOF-74 could be likely considered as a prospective industrial NH3-SCR NOx control catalyst. [Display omitted] •Co/Mn-MOF-74 with different Co contents were synthesized by the hydrothermal method.•The content of Co affected the morphology and the NH3-SCR catalytic performance of Co/Mn-MOF-74.•Mn0.66Co0.34-MOF-74 showed the best NH3-SCR catalytic performance.•Mn0.66Co0.34-MOF-74 showed excellent SO2 resistance.