Analysis of Non-Selective Catalyst Reduction Performance with Dedicated Exhaust Gas Recirculation

Rich burn industrial natural gas engines offer best in class post catalyst emissions by using a non-selective reduction aftertreatment technology. However, they operate with reduced power density when compared to lean engines. Dedicated exhaust recirculation (EGR) offers possible pathway for rich use technology without sacrificing density. In order achieve emissions, the precious metals and washcoat of must be designed according expected composition an engine. this work, engine operating dedicated EGR was paired commercially available catalyst. At rated brake mean effective pressure (BMEP) air-fuel ratio swept between conditions compare efficiency combustion. It found that due low oxides nitrogen (NOx) across entire range, much larger range ratios where regulated can met. Low out NOx also points towards possibility oxidation rather than applications. The location NOx-CO tradeoff shifted more EGR.