High-efficiency removal of NOx over natural mordenite using an enhanced plasma-catalytic process at ambient temperature. (15th July 2018)

• Record Type: Journal Article
• Authors: Wang, Hui; Cao, Yingying; Chen, Zewen; Yu, Qinqin; Wu, Shengji
• Is Part Of: Fuel. Volume 224(2018)
• Page Start: 323
• Page End: 330
• Publication Date: 2018-07-15
• Subjects: Plasma -- Adsorption -- NOx -- Natural mordenite -- CH4; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2018.03.065
• Languages: English
• ISSNs: 0016-2361

Abstract

Graphical abstract: Highlights: NOx conversion on MOR reach 98% in the present process at ambient temperature. The modified NMOR exhibited higher NOx adsorption capacity than MOR. NOx conversion on NMOR reach 95% in the present process at ambient temperature. Performance of NMOR for DeNOx was stable during the cyclic operation. Abstract: Plasma-assisted catalysis technology has been identified as one of the most efficient feasible routes for DeNOx . In this work, a combined NOx adsorption-CH4 plasma discharge process has been developed for DeNOx . The conversion of the adsorbed NOx on H-MOR and Co-MOR could reach 99.7% and 98.3% in the present process at ambient temperature, respectively. The results verified the feasibility of the present process using MORs as adsorbents and catalysts in theory. Then, the cost-effective natural mordenite (NMOR) was used as the adsorbent and catalyst instead of MOR. After acid treatment and ion-exchange, the modified Co-NMOR exhibited higher NOx adsorption capacity than MOR. The NOx conversion and N2 selectivity on Co-NMOR were 95.0% and 100.0% in the CH4 -plasma discharge stage, respectively. Meanwhile, the cyclic operation of Co-NMOR for DeNOx has also been investigated.