Exhaust treating system for lean-burn cng engine

F - Mech Eng,Light,Heat,Weapons – 01 – N

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

F01N 3/28 (2006.01) F02B 43/00 (2006.01)

Patent

CA 2081964

-17- Abstract of the Invention A three-way catalyst system for efficiently converting the exhaust gas from a CNG-fueled engine when operated under lean conditions at a redox ratio of .02-.9, the system comprising a first stage catalyst comprising a transition metal-containing zeolite; means for injecting a hydrocarbon into said exhaust gas prior to entry of said exhaust gas into said first stage catalyst, said hydrocarbon having a greater affinity than CH4 in its ability to react with NO; and a second stage catalyst for treating the effluent from said first stage catalyst and comprising a high surface area alumina impregnated with discontinuous La2O3 and palladium. The invention also comprehends a method of treating exhaust gases from a lean-burn CNG-fueled engine, operating at a redox ratio of .02-.9; exposing such exhaust gases to a first stage catalyst consisting of copper-ZSM5 zeolite having at least 3% by weight ion-exchange copper; injecting a fast-acting hydrocarbon into said exhaust gas prior to entry of the exhaust gas into said first stage catalyst, the hydrocarbon having a greater affinity than CH4 in its ability to react with NO; and exposing the effluent from the first stage catalyst to a second stage catalyst comprising palladium supported on alumina containing discontinuous La2O3..

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Exhaust treating system for lean-burn cng engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exhaust treating system for lean-burn cng engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust treating system for lean-burn cng engine will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-2079729

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.