Chemical and Toxicological Properties of Emissions from a Light-Duty Compressed Natural Gas Vehicle Fueled with Renewable Natural Gas
نویسندگان
چکیده
Biogas consisting primarily of methane (CH4) and carbon dioxide (CO2) can be upgraded to a transportation fuel referred as renewable natural gas (RNG) by removing CO2 other impurities. RNG has energy content comparable fossil compressed (CNG) but with lower life-cycle greenhouse (GHG) emissions. In this study, light-duty cargo van was tested CNG two blends on chassis dynamometer in order compare the toxicity resulting exhaust. Tests for reactive oxygen species (ROS), biomarker expressions (CYP1A1, IL8, COX-2), mutagenicity (Ames) show that exhaust is or than Statistical analysis reveals associations between tailpipe emissions benzene, dibenzofuran, dihydroperoxide dimethyl hexane (the last identification considered tentative/uncertain). Further gas-phase may associated formaldehyde, sulfide, propene, methyl ketene. contained higher concentrations these potentially toxic chemical constituents all current tests. Photochemical aging vehicle did not alter trends. These preliminary results suggest adoption useful strategy reduce intensity fuels without increasing
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ژورنال
عنوان ژورنال: Environmental Science & Technology
سال: 2021
ISSN: ['1520-5851', '0013-936X']
DOI: https://doi.org/10.1021/acs.est.0c04962