Superhydrophobic catalyst-wrapped fibrofelt with anti-moisture, anti-dusting and NH 3 -SCR properties

• Published in: New journal of chemistry 2022-07, Vol.46 (29), p.14010-14019
• Main Authors: Liu, Ping, Yang, Yongling, Wang, Wei, Gu, Wancheng, Chen, Junxu, Chen, Chujun, Yu, Xinquan, Zhang, Youfa
• Format: Article
• Language: English
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/D2NJ01740G

In order to overcome the problem of catalyst poisoning and achieve high-efficient denitration and dust-removal integration, new catalytic filters loaded with superhydrophobic MnO x catalysts (SA-MnO x @Filter) were fabricated by a waterborne coating method for the first time, realizing high-efficiency denitration and dust removal simultaneously (NO x conversion exceeded 91% at 180 °C). Benefiting from its superhydrophobicity, the catalyst was prevented from being covered by resin, exposing more effective catalytic areas. Furthermore, the superhydrophobic components on the catalyst surface also inhibited the sulfation of active components and enhanced SO 2 tolerance. Meanwhile, the low surface tension allowed for the easy removal of ammonium bisulfate and dust, realizing reversible inactivation. Besides, the superhydrophobic components restrained the condensation of water into a liquid film on the catalyst surface, improving H 2 O resistance. The newly designed superhydrophobic filter has potent catalytic activity and excellent SO 2 and H 2 O resistance, making it a potential filter for real exhaust control.