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SAE Publishes HARC Research on Engine Emissions

Posting Date: 
Wednesday, March 29, 2017
In the quest to cut costs and improve environmental performance, oil and gas operations are increasingly being powered by natural gas fuel. One way in which this can be done is with Dual Fuel Diesel Engines. Dual fuel engines can utilize natural gas (mostly methane) and diesel fuel together to reduce the amount of diesel fuel needed. Dual fuel engines offer certain emissions advantages, such as lower amounts of nitrogen oxides, or NOx, a product of combustion that contributes to air pollution. But, because of various factors, some of the natural gas can escape combustion and be emitted in exhaust as Non-Combusted Methane (NCM).
Innovative catalysts reduce non-combusted methane in dual fuel diesel engine exhaust

Conventional diesel engine exhaust aftertreatment systems are effective for reducing pollutants with the use of catalysts, similar to the catalytic converters used on vehicles. However, these catalytic systems are generally not effective at eliminating NCM.

HARC scientists developed and tested improved catalysts specifically designed to address NCM. While many catalytic systems use precious metals, the catalyst formulations tested in this work were made with common lower-cost metals including copper, nickel, and cobalt. Experimental results indicated improved reduction of NCM.

HARC Research Associate Dr. Fanxu Meng will present a paper co-authored with other HARC scientists on the findings of this work at the Society of Automotive Engineers World Congress in Detroit, Michigan in April. The paper entitled “Conversion of Exhaust Gases from Dual-Fuel (Natural Gas-Diesel) Engine under Ni-Co-Cu/ZSM-5 Catalysts” can be downloaded from SAE International at