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Title: The impact of sulphur storage on emissions from three-way catalysts

Abstract

The relationship between H/sub 2/S emissions from three-way catalysts and the storage of sulphur on the catalyst surface has been investigated. Thermodynamic data predict that sulphur storage primarily will occur on Al/sub 2/O/sub 3/ and CeO/sub 2/ under lean and stoichiometric conditions, at up to 500/sup 0/C. Rich transients could then induce the decomposition of the Ce-S-O and Al-S-O compounds, releasing sulphur into the gas phase. Experimental studies have supported this model. A mechanism has been proposed for the subsequent formation of H/sub 2/S. The mechanism by which catalyst poisons attenuate H/sub 2/S emissions from engine-aged catalysts also has been studied. The effect has been shown to be related to decreased storage of sulphur, caused by stable catalyst-poison species at the catalyst surface.

Authors:
; ;
Publication Date:
OSTI Identifier:
5138725
Report Number(s):
CONF-871142-
Resource Type:
Conference
Resource Relation:
Conference: International fuels and lubricants meeting and exposition, Toronto, Canada, 2 Nov 1987; Other Information: Technical Paper 872163
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; 54 ENVIRONMENTAL SCIENCES; HYDROGEN SULFIDES; AIR POLLUTION CONTROL; INTERNAL COMBUSTION ENGINES; CATALYSTS; EMISSION; ALUMINIUM OXIDES; CERIUM OXIDES; CHEMICAL REACTION KINETICS; EXHAUST SYSTEMS; HIGH TEMPERATURE; POLLUTION CONTROL EQUIPMENT; SULFUR; THERMAL DEGRADATION; THERMODYNAMICS; ALUMINIUM COMPOUNDS; CERIUM COMPOUNDS; CHALCOGENIDES; CONTROL; ELEMENTS; ENGINES; EQUIPMENT; HEAT ENGINES; HYDROGEN COMPOUNDS; KINETICS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; POLLUTION CONTROL; RARE EARTH COMPOUNDS; REACTION KINETICS; SULFIDES; SULFUR COMPOUNDS; 330100* - Internal Combustion Engines; 330700 - Advanced Propulsion Systems- Emission Control; 500200 - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989)

Citation Formats

Diwell, A F, Hallett, C, and Taylor, J R. The impact of sulphur storage on emissions from three-way catalysts. United States: N. p., 1987. Web.
Diwell, A F, Hallett, C, & Taylor, J R. The impact of sulphur storage on emissions from three-way catalysts. United States.
Diwell, A F, Hallett, C, and Taylor, J R. 1987. "The impact of sulphur storage on emissions from three-way catalysts". United States.
@article{osti_5138725,
title = {The impact of sulphur storage on emissions from three-way catalysts},
author = {Diwell, A F and Hallett, C and Taylor, J R},
abstractNote = {The relationship between H/sub 2/S emissions from three-way catalysts and the storage of sulphur on the catalyst surface has been investigated. Thermodynamic data predict that sulphur storage primarily will occur on Al/sub 2/O/sub 3/ and CeO/sub 2/ under lean and stoichiometric conditions, at up to 500/sup 0/C. Rich transients could then induce the decomposition of the Ce-S-O and Al-S-O compounds, releasing sulphur into the gas phase. Experimental studies have supported this model. A mechanism has been proposed for the subsequent formation of H/sub 2/S. The mechanism by which catalyst poisons attenuate H/sub 2/S emissions from engine-aged catalysts also has been studied. The effect has been shown to be related to decreased storage of sulphur, caused by stable catalyst-poison species at the catalyst surface.},
doi = {},
url = {https://www.osti.gov/biblio/5138725}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1987},
month = {Thu Jan 01 00:00:00 EST 1987}
}

Conference:
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