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Catalytic Reduction of S. I. Engine Emissions Using Ion-Exchanged X-Zeolites.
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 13, 1999 by The Automotive Research Association of India in India
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Three catalysts such as Cu-X, Cu-Ni-X, and Cu-Fe-X based on X-Zeolite have been developed by exchanging its Na+ with copper, Iron and Nickel metal ions and tested in a commercial Maruti 800 cc S I engine and some encouraging results for reduction of NOx and CO have been obtained. The bi-metal catalysts are named based on the order of ion-exchange treatment. Out of three catalysts, Cu-X catalyst exhibits the best NOx and CO conversion performance while Cu-Ni-X shows better performance compared to Cu-Fe-X catalysts at any catalyst temperature. Maximum NOx and CO conversion efficiencies achieved with Cu-X catalyst are 62.2% and 62.4%, with Cu-Ni-X catalyst are 47.0% and 50.0%, and with Cu-Fe-X are 43.1% and 43.8% respectively.
Unlike noble metals, the doped X-Zeolite catalysts studied here, exhibit significant NOx reduction for a wide range of A/F ratio and exhibit a slow rate of decrease with increase in A/F ratio. Back pressure developed across the catalyst bed is found to be well within the acceptable limits and power loss due to the back pressure is only 0.2%. During 30 hours of testing of each catalyst, no significant deactivation of any catalyst was observed.
CitationGhosh, B. and Das, R., "Catalytic Reduction of S. I. Engine Emissions Using Ion-Exchanged X-Zeolites.," SAE Technical Paper 990015, 1999, https://doi.org/10.4271/990015.
- Konig A. A co-operative Research Project on NO x Catalysis for Lean Automotive Engines Automotive Conference Brussels 11-12 March 1993
- Iwamoto, M. Mizuno, N. NO x Emission Control in Oxygen-Rich Exhaust through Selective Catalytic Reduction by Hydrocarbon Proc. of The Institution of Mechnical Engineers, J. of Automobile Engg. 207 1993 23 33
- Monroe, D. R. DiMaggio, C.L. Beck, D. D. Metekunas, F.A. Evaluation of a Cu/Zeolite Catalyst to Remove NO x from Lean Exhaust SAE 102 paper no. 930737 1993 574 582
- Konno, M. Chikahisa, T. Murayama, T. Iwamoto, M. Catalytic reduction of NO x in Actual Diesel Engine Exhaust SAE 101 paper no. 920091 1992 11 18
- Cho, B.K. Nitric Oxide Reduction by Hydrocarbons over Cu-ZSM-5 Monolith Catalyst Under Lean Conditions: Steady State Kinetics J. Catal. 142 1993 418 429
- Monroe, D.R. DiMaggio, C. L. Beck, D.D. Metekunas, F.A. Evaluation of a Cu/Zeolite catalyst to remove NO x from lean exhaust SAE, 930737 102 574 582 1993
- Cho, B. K. Nitric oxide reduction by hydrocarbons over Cu-ZSM-5 monolith under lean conditions: steady-state kinetics J. Catal. 142 418 429 1993
- Iwamoto, M. Yohoo, S. Sakai, K. Kagawa, S. Catalytic decomposition of nitric oxide over copper(II) exchanged Y-type zeolites J. Chem, SOC, Faraday Trans. 1 77 1629 1638 1981
- Misono, M. Kondo, K. Catalytic Removal of Nitrogen Monoxide over Rear-Earth Ion-Exchanged Zeolites in the presence of Propene and Oxygen Chemistry Letters 1991 1001 1002
- Held, W. Konig, A. Richtel, T. Puppe, L. Catalytic NO x Reduction in Net Oxidizing Exhaust Gas SAE 99 paper no. 900496 1990 209 216
- Amiridis, M. D. Puglisi, F. Dumesic, J.A. Millman, W. S. Topose, N. Y. Kinetic and Infrared Spectroscopic Studies of Fe-Y Zeolites for the Selective Catalytic Reduction of Nitric Oxide by Ammonia J. Catal. 142 1993 572 584