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Study finds propane school buses significantly decrease NOx emissions compared to diesel

Green Car Congress

According to a study commissioned by the Washington, DC-based Propane Education & Research Council (PERC), NO x emissions measured from propane autogas school buses were substantially lower than those measured from diesel school buses. For the stop-and-go route, NO x emissions were 34 times higher for the diesel school bus.

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Hyundai Motor puts XCIENT Fuel Cell electric trucks into commercial fleet operation in California with $3.5M from EPA

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million in 2021 Targeted Airshed Grant (TAG) funding from the US Environmental Protection Agency (EPA) to deploy five XCIENT Fuel Cell electric trucks in California. The XCIENT Fuel Cell 6x4 tractor model participating in the demonstration is equipped with a 180 kW fuel cell system and e-motor with a maximum output of 350 kW.

Hyundai 370
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UK researchers report that alcohols in windshield washer fluid are major unreported source of VOCs emissions from cars, including EVs

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In a recent open-access paper published in ACS’ Environmental Science & Technology , researchers from the University of York report that alcohols in windshield washer fluid account for a larger fraction of real-world vehicle emissions than previous estimates have suggested. Cliff et al. —Cliff et al.

Emissions 397
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US reaches $1.5B settlement with Daimler AG over emissions cheating in Mercedes-Benz diesels; civil penalty of $875M

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The US Environmental Protection Agency (EPA), USDepartment of Justice (DOJ), and California Air Resources Board (CARB) announced a proposed settlement with Daimler AG and its American subsidiary Mercedes-Benz USA, LLC resolving alleged violations of the Clean Air Act and California law associated with emissions cheating.

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HEI launches two new non-tailpipe particulate emission studies

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The Health Effects Institute (HEI) has launched two new studies funded under RFA 21-1, Quantifying Real-World Impacts of Non-Tailpipe Particulate Matter Emissions. The new studies are: Improved Characterization of the Real-World Contributions and Impacts of Non-tailpipe Particulate Matter Emissions ,” led by Greg Evans, University of Toronto.

Emissions 353
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Japan, China researchers develop plasma-assisted MnO2 filter that produces zero-NO2, -SO2 diesel exhaust

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This research, published in the journal Separation and Purification Technology , shows that ozone can be used to remove not only SO x but also NO x from fossil fuel combustion exhaust streams. In this study, to improve absorption performance of SO 2 and NO 2 , we added ozone in exhaust gas. Osaka et al. 2018.12.077.

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Reduction in diesel carbonyl emissions using F-T fuel from coal

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Other research has shown that carbonyls directly influence physiological response to diesel exhaust particles and can also contribute to secondary organic aerosol formation. In the Tianjin study, they team fueled a four-cylinder light-duty diesel engine fueled with CFT and DF, identifying 13 individual carbonyl compounds in the exhaust.

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