Effects of Fuel and Oxidation Catalyst on Exhaust Emissions for Heavy Duty Diesel Engines and Diesel Passenger Cars

Tamanouchi, Mitsuo; Morihisa, Hiroki; Araki, Hiroshi; Yamada, Shigehisa

doi:10.4271/980530

Cited by 17 publications

(2 citation statements)

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“…Current dual-fuel technologies are retrofit kits applied to conventional compression ignition diesel engines . These types of retrofit kits have been shown to increase CO and NMHC engine out emissions. ,− To overcome this weakness industry has implemented DOCs to reduce CO emissions. − On the basis of literature, there are methods to reduce dual-fuel emissions through engine optimization and sophisticated system integration. Such methods have shown decreased CH 4 slip. − Our in-use data showed dual-fuel drilling and hydraulic fracturing engines had methane slip rates of 14% to 19% and 22%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Estimated Emissions from the Prime-Movers of Unconventional Natural Gas Well Development Using Recently Collected In-Use Data in the United States

Johnson

Heltzel

Nix

et al. 2018

Environ. Sci. Technol.

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Natural gas from shale plays dominates new production and growth. However, unconventional well development is an energy intensive process. The prime movers, which include over-the-road service trucks, horizontal drilling rigs, and hydraulic fracturing pumps, are predominately powered by diesel engines that impact air quality. Instead of relying on certification data or outdated emission factors, this model uses new in-use emissions and activity data combined with historical literature to develop a national emissions inventory. For the diesel only case, hydraulic fracturing engines produced the most NO emissions, while drilling engines produced the most CO emissions, and truck engines produced the most THC emissions. By implementing dual-fuel and dedicated natural gas engines, total fuel energy consumed, CO, CO, THC, and CH emissions would increase, while NO emissions, diesel fuel consumption, and fuel costs would decrease. Dedicated natural gas engines offered significant reductions in NO emissions. Additional scenarios examined extreme cases of full fleet conversions. While deep market penetrations could reduce fuel costs, both technologies could significantly increase CH emissions. While this model is based on a small sample size of engine configurations, data were collected during real in-use activity and is representative of real world activity.

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Section: Resultsmentioning

confidence: 99%

Estimated Emissions from the Prime-Movers of Unconventional Natural Gas Well Development Using Recently Collected In-Use Data in the United States

Johnson

Heltzel

Nix

et al. 2018

Environ. Sci. Technol.

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“…26 shows the FTP-75 cycle CO emissions as a function of the aging hours and the fuel type used. Once again, all the CO emissions were nearly reduce by 100%.…”

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confidence: 99%

Influence of fuel sulfur content on emissions from diesel engines equipped with oxidation catalysts

Evans¹

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Diesel oxidation catalysts (DOCs) are a viable exhaust aftertreatment alternative for alleviating regulated exhaust emissions of hydrocarbon (HC), carbon monoxide (CO), and particulate matter (PM) from diesel-fueled heavy-duty engines. This study was a part of the Diesel Emissions Control-Sulfur Effects (DECSE) program that was aimed at determining the impact of diesel fuel sulfur levels on diesel oxidation catalysts that were designed to lower brake-specific PM, HC, and CO emissions from on-highway trucks and buses in the 2002-2004 model years. The research focused on high-temperature DOCs installed on a Cummins ISM370 ESP engine, and low-temperature DOCs installed on a Navistar T444E engine to determine how the DOCs affect the various emissions, how fuel sulfur affects emissions, and how fuel sulfur poisons the catalysts over time. The DOCs were found to affect the brake-specific PM, HC, and CO emissions. The PM emissions were not significantly affected by the DOCs when lower sulfur fuels (3 ppm and 30 ppm) were used. Brake-specific PM emissions were dramatically increased with the higher sulfur fuel (350 ppm) due to the formation of sulfates and the associated sulfate bound water. Hence, fuel sulfur affected the brake-specific PM, HC, and CO emissions from DOC equipped heavy-duty diesel engines. Brake-specific HC emissions were eliminated by nearly 100% by the use of the DOCs. The DOCs had various reduction efficiencies ranging from 90% to 100% for CO emissions from the Navistar engine and 24% to 79% for the Cummins engine. The DOCs were only evaluated for only 250 aging hours, which is a relatively short duration. Over this short amount of time, there was no significant evidence of the fuel sulfur poisoning the diesel oxidation catalysts. iii ACKNOWLEGDEMENTS After six years of college education, a part of my life has finally ended. However, there is another part about to begin. Through the past two years of graduate school I have encountered some rough times, but it seemed that the better always won. As I look back on these past two years, I know I could not have accomplished everything on my own. I would like to take this time to express my thanks to the ones that helped see me through this challenging and rewarding time. The first and foremost who needs to be recognized is God. I would never be here if were not for Him. Even though He is unseen, I know His presence is always with me. He needs to be recognized due to the fact that too often He does go unacknowledged. Now to my parents, where I believe there is not enough time and words to show my appreciation and gratitude. Mom and Dad, without your love, encouragement, understanding, and support, I know none of this could have been possible. You have been there for me all the way, and I know you will always be there for me in the future. I can't express how much I love the two of you for this. You need to be recognized for one huge accomplishment, financially supporting three boys through engineering school. Dad, I know it was a lot of hard work for you, a...

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Effects of methanol-containing additive on emission characteristics from a heavy-duty diesel engine

Chao

Lin

Chao

et al. 2001

Science of The Total Environment

117

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Effects of Fuel and Oxidation Catalyst on Exhaust Emissions for Heavy Duty Diesel Engines and Diesel Passenger Cars

Cited by 17 publications

References 1 publication

Estimated Emissions from the Prime-Movers of Unconventional Natural Gas Well Development Using Recently Collected In-Use Data in the United States

Estimated Emissions from the Prime-Movers of Unconventional Natural Gas Well Development Using Recently Collected In-Use Data in the United States

Influence of fuel sulfur content on emissions from diesel engines equipped with oxidation catalysts

Effects of methanol-containing additive on emission characteristics from a heavy-duty diesel engine

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