Development and Performance Studies on Ion-Exchanged X-Zeolites as Catalysts for SI Engine Emission Control

Paper #:
  • 971652

Published:
  • 1997-05-01
Citation:
Das, R., Bhattacharyya, S., Ghosh, B., and DuttaGupta, M., "Development and Performance Studies on Ion-Exchanged X-Zeolites as Catalysts for SI Engine Emission Control," SAE Technical Paper 971652, 1997, https://doi.org/10.4271/971652.
Pages:
16
Abstract:
Three catalysts based on X-zeolite have been developed by exchanging its Na+ ion with Copper, Nickel and Vanadium metal ions and tested in a stationary SI engine exhaust to observe their potentialities for NOx and CO controlling. The catalyst Cu-X, in comparison to Ni-X and V-X, exhibits much better NOx and CO reduction performance at any temperature. Maximum NOx conversion efficiencies achieved with Cu-X, Ni-X and V-X are 62.2%, 59.7% and 56.1% respectively. Unlike noble metals, the doped X-zeolite catalysts, studied here, maintain their peak NOx reduction performance through a wider range of A/F ratio. Back pressure developed across the catalyst bed is found to be well within the acceptable limits.
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