In this study, ZSM-5 zeolites were successfully in situ synthesized on the surface of honeycomb cordierite substrate and certified by XRD and SEM techniques. Strong interaction between zeolite and substrate has been found during in-situ synthesis, and hydrothermal stabilities of the zeolites was improved by entailing. The in-situ synthesized monolithic ZSM-5/cordierite showed superior thermal and hydrothermal stabilities. Cu-ZSM-5/cordierite was prepared by ion-exchange and impregnation methods were studied as catalysts for selective catalytic reduction (SCR) of nitrogen oxides (NOx) in a lean-burn gasoline engine. Engine test results show that NOx emission was decreased by reductants of HC and CO in the exhaust gas without any other extra reducing agents. It also exhibited high activities. Using Cu-ZSM-5/cordierite, the maximum NOx conversion efficiency to N2 reached to 64% at the exhaust temperature of 400 °C and the gas hourly space velocity (GHTV) of 25 000/h. Meanwhile, the HC conversion efficiency was about 60%, while CO was little converted. Cu-ZSM-5/cordierite also showed good duration and anti-poison properties. Furthermore, the activated temperature of the Cu-ZSM-5/cordierite was decreased and the NOx conversion was increased via addition of iridium as a modifier.
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ASME 2005 Internal Combustion Engine Division Fall Technical Conference
September 11–14, 2005
Ottawa, Ontario, Canada
Conference Sponsors:
- Internal Combustion Engine Division
ISBN:
0-7918-4736-5
PROCEEDINGS PAPER
Evaluation of In-Situ Synthesized Monolithic Metal-MFI/Cordierite Catalysts to Remove NOx From Lean Exhaust
Tianyou Wang,
Tianyou Wang
Tianjin University, Tianjin, China
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Shuliang Liu,
Shuliang Liu
Tianjin University, Tianjin, China
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Naijia Guan
Naijia Guan
Nankai University, Tianjin, China
Search for other works by this author on:
Tianyou Wang
Tianjin University, Tianjin, China
Shuliang Liu
Tianjin University, Tianjin, China
Hongjun Xu
Tianjin University, Tianjin, China
Xing Li
Tianjin University, Tianjin, China
Maolin Fu
Tianjin University, Tianjin, China
Landong Li
Nankai University, Tianjin, China
Naijia Guan
Nankai University, Tianjin, China
Paper No:
ICEF2005-1253, pp. 73-79; 7 pages
Published Online:
November 11, 2008
Citation
Wang, T, Liu, S, Xu, H, Li, X, Fu, M, Li, L, & Guan, N. "Evaluation of In-Situ Synthesized Monolithic Metal-MFI/Cordierite Catalysts to Remove NOx From Lean Exhaust." Proceedings of the ASME 2005 Internal Combustion Engine Division Fall Technical Conference. ASME 2005 Internal Combustion Engine Division Fall Technical Conference (ICEF2005). Ottawa, Ontario, Canada. September 11–14, 2005. pp. 73-79. ASME. https://doi.org/10.1115/ICEF2005-1253
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