Authors
Fuli Wang, Tianwei Lan, Xiaonan Hu, Aling Chen, Xin Chen, Xinrui Xu, Mengxue Wang, Ming Xie, Yongjie Shen, Penglu Wang, Dengsong Zhang
Published in
Environmental science & technology. Aug 04, 2025. Epub Aug 04, 2025.
Abstract
Synergistic catalytic removal (SyCR) of NOx and chlorinated volatile organic compound (CVOCs) emission from nonelectric industries is effective to suppress PM2.5 and ozone complex air pollution. Catalysts with balanced competence to reduce NOx and oxidize CVOCs, as well as the resistance to chlorine poisoning, are critical to SyCR. Here, neighboring effects over SmMn2O5 mullite (SMO) modified by HZSM-5 composite catalysts (SMO-Z) were demonstrated in the Cl-resistant SyCR of NOx and chlorobenzene (CB, a representative CVOCs). Characterizations demonstrated that HZSM-5 modification did not alter the crystal structure of SMO and retained Mn-O-Mn-Mn active sites for the SyCR of NOx and CB. HZSM-5 regulated the redox ability of SMO-Z to reduce the formation of inert nitrate species and to promote the N2 selectivity. Acidic HZSM-5 acted as dechlorination sites to promote the breakage of the C-Cl bond via the nucleophilic substitution reaction and accelerated the formation of HCl to avoid Cl poisoning on catalysts. The fine-tuned compensation of surface acidity by HZSM-5 suppressed the competitive adsorption of NH3 and CB on SMO-Z, which promoted NOx reduction at high temperatures, whereupon neighboring effects between HZSM-5 acidic dechlorination sites and SMO active redox sites on SMO-Z capitally promoted the SyCR efficiency and antichlorination poisoning performance.
PMID:
40758917
Bibliographic data and abstract were imported from PubMed on 05 Aug 2025.
Read full publication at:
Please sign in
to see all details.
Advertisement
Stats
- Recommendations n/a n/a positive of 0 vote(s)
- Views 63
- Comments 0