Development of a Sulfur Tolerant PGM Based Zeolite Catalyst for Methane Oxidation and Low Temperature Hydrocarbon Trapping 2013-01-0531
With forthcoming 2014 EPA GHG legislation capping methane
emissions at 0.10 g/bhp-hr for heavy-duty engines, development of a
thermally stable and sulfur-tolerant methane oxidation catalyst
becomes more critical. This is particularly true for natural
gas-powered engines where methane slip is a significant contributor
in the emissions and sulfur is present as a constituent of odorants
used in CNG.
Scientists at Clariant have recently developed a novel process
for manufacturing a PGM containing zeolite that is both thermally
stable and resistant to sulfur poisoning. Methane oxidation
catalysts typically require temperatures in excess of 400°C to
achieve light-off and are often sensitive to exposure to sulfur.
The PGM zeolite catalyst has shown remarkable activity at low
temperatures and a resistance to sulfur poisoning. Tests have shown
that even after exposure to heavy concentrations of sulfur, the
catalyst has little change in activity.
In addition to methane oxidation, this catalyst has shown
excellent hydrocarbon storage and oxidation activity at low
temperatures. These properties allow this new material to be used
in applications where cold-start emissions control is particularly
Citation: Guliaeff, A., Wanninger, K., Klose, F., Maletz, G. et al., "Development of a Sulfur Tolerant PGM Based Zeolite Catalyst for Methane Oxidation and Low Temperature Hydrocarbon Trapping," SAE Technical Paper 2013-01-0531, 2013, https://doi.org/10.4271/2013-01-0531. Download Citation
Alexander Guliaeff, Klaus Wanninger, Frank Klose, Gerd Maletz, Arno Tissler