Hybrid Cu-Fe/ZSM-5 Catalyst Prepared by Liquid Ion-Exchange for NOx Removal by NH3-SCR Process. (29th June 2021)

• Record Type: Journal Article
• Authors: Doan, Tuan; Dang, Anh; Nguyen, Dat; Vuong, Thanh Huyen; Le, Minh Thang; Thanh, Huyen Pham
• Other Names: Rafique Jamal Academic Editor.
• Is Part Of: Journal of chemistry. Volume 2021(2021)
• Publication Date: 2021-06-29
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1155/2021/5552187
• Languages: English
• ISSNs: 2090-9063

Abstract

Abstract : A series of Cu/ZSM-5, Fe/ZSM-5, and Cu-Fe/ZSM-5 catalysts (Si/Al in ZSM-5 = 25) were prepared by different metal loadings using the liquid ion-exchange method. Several characterization methods were conducted to explore the effects of metals on the physical and chemical properties of catalysts. Meanwhile, the electron paramagnetic resonance method is also used to assess the copper and/or iron elements' coordination and valence state at intersections or in channels of ZSM-5. The metal-loading effects of all catalysts on the catalytic activities were studied for the removal of NOx in a fixed-bed flow reactor using selective catalytic reduction with ammonia (NH3 -SCR). The results showed that the iron's addition could markedly broaden the operation temperature range of the Cu/ZSM-5 catalyst for NH3 -SCR between 200 and 550°C due to the presence of more isolated Cu 2+ ions as well as additional oligomeric Fe 3+ active sites and Fe x O y oligomeric species. This paper gives a facile and straightforward way to synthesize the practical-promising catalyst applied in NH3 -SCR technology to control NO x emissions.