Low-Temperature Selective Catalytic Reduction of NOx on MnO2 Octahedral Molecular Sieves (OMS-2) Doped with Co

Catalysts

Yuxi Yu¹  Laichao Li¹  Hanbing He²  Yusi Wang²  Li Zhang² 

[1] Fujian Key Laboratory of Advanced Materials, Department of Materials and Engineering, College of Materials, Xiamen, Fujian 361005, China;School of Metallurgy and Environment, Central South University, Changsha 410083, China;

关键词: denitrification;    CO-SCR;    OMS-2;    sulfur resistance;    cobalt doping;   

DOI  :  10.3390/catal10040396

来源: DOAJ

【 摘 要 】

To improve NO conversion and sulfur resistance of low-temperature NO-CO selective catalytic reduction (SCR), it is urgent to seek new catalyst materials. Herein, using the pre-doping method, Co_x-OMS-2 with different ratios of cobalt (Co) was obtained during hydrothermal synthesis of OMS-2 molecular sieves (where x represents the doping ratio of Co, i.e., x = 0.1, 0.2, 0.3, 0.4). Co was found to very efficiently intercalate into the crystal structure of OMS-2. Co and Mn work together to promote the selective reduction reaction of NO_x;; the NO conversion of Co_0.3-OMS-2 was the highest among all samples. Specifically, NO conversion at 50 °C increased from 72% for undoped OMS-2 to 90% for Co_0.3-OMS-2. Moreover, due to the incorporation of Co, the latter also showed better sulfur resistance.

【 授权许可】

Unknown