B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/04 (2006.01) B01D 53/94 (2006.01) F01N 3/08 (2006.01) F01N 3/20 (2006.01) F01N 13/02 (2010.01) F02M 25/07 (2006.01) B01D 53/36 (1990.01) F01N 7/02 (2006.01)
Patent
CA 2100935
Abstract of the Disclosure An improvement in a system and method is disclosed for converting exhaust gas from an exhaust gas generating device, to innocuous products in which exhaust gas is contacted with a catalyst system comprising a NOx, CO, and hydrocarbon conversion catalyst. The improvement comprises providing a zeolite upstream of the conversion catalyst and positioned close enough to the device to allow the temperature of the zeolite to reach at least about 100°C within a period of time of no longer than about 100 seconds after start-up of the device, and contacting the exhaust gas with the zeolite to cause adsorption of hydrocarbons during that period. The zeolite has a SiO, to Al2O, mole ratio of no greater than about 250 to 1, and pore openings of about 3.8 to about 6ØANG. in diameter.
Hertl William
Lachman Irwin Morris
Corning Incorporated
Gowling Lafleur Henderson Llp
LandOfFree
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