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5. Influence of Catalyst Support Geometry and Wall Thickness on NOx Trap Desulfation: Rich/Lean Wobbling Strategies and Hexagonal Cell Supports for High SO2 Selectivity During Desulfation.

Author

Sassi, Alain, Noirot, Rémi, Rigaudeau, Christine, and Belot, Gérard

Subjects
CATALYST supports, LIQUID fuels, PETROLEUM products, CELL compartmentation
Abstract

This Synthetic Gas Bench (SGB) study focuses on the effect of cell geometry and wall thickness on the gasoline NOx trap functionality. The data show that besides a NOx trap efficiency improvement, hexagonal cells increase the sulfur resistance of the NOx trap. This feature is explained by the different wash-coat distributions in the hexagonal channels compared to square ones. The effect of lean/rich fast switching (wobbling) during desulfation was investigated and the SO2/H2S selectivity was studied: the combination of hexagonal cells and a wobbling desulfation strategy improves the H2S/SO2 selectivity by reducing the amount of H2S formed. [ABSTRACT FROM AUTHOR]

Published
2004
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