{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T23:20:46Z","timestamp":1790724046082,"version":"4.1.0"},"reference-count":41,"publisher":"Royal Society of Chemistry (RSC)","content-domain":{"domain":["rsc.org"],"crossmark-restriction":true},"short-container-title":["Faraday Discuss."],"abstract":"<p>\n                    Increased biofuel content in automotive fuels impacts vehicle tailpipe emissions\n                    <italic>via<\/italic>\n                    two mechanisms: fuel chemistry and engine calibration. Fuel chemistry effects are generally well recognized, while engine calibration effects are not. It is important that investigations of the impact of biofuels on vehicle emissions consider the impact of engine calibration effects and are conducted using vehicles designed to operate using such fuels. We report the results of emission measurements from a Ford F-350 fueled with either fossil diesel or a biodiesel surrogate (butyl nonanoate) and demonstrate the critical influence of engine calibration on NO\n                    <sub>x<\/sub>\n                    emissions. Using the production calibration the emissions of NO\n                    <sub>x<\/sub>\n                    were higher with the biodiesel fuel. Using an adjusted calibration (maintaining equivalent exhaust oxygen concentration to that of the fossil diesel at the same conditions by adjusting injected fuel quantities) the emissions of NO\n                    <sub>x<\/sub>\n                    were unchanged, or lower, with biodiesel fuel. For ethanol, a review of the literature data addressing the impact of ethanol blend levels (E0\u2013E85) on emissions from gasoline light-duty vehicles in the U.S. is presented. The available data suggest that emissions of NO\n                    <sub>x<\/sub>\n                    , non-methane hydrocarbons, particulate matter (PM), and mobile source air toxics (compounds known, or suspected, to cause serious health impacts) from modern gasoline and diesel vehicles are not adversely affected by increased biofuel content over the range for which the vehicles are designed to operate. Future increases in biofuel content when accomplished in concert with changes in engine design and calibration for new vehicles should not result in problematic increases in emissions impacting urban air quality and may in fact facilitate future required emissions reductions. A systems perspective (fuel and vehicle) is needed to fully understand, and optimize, the benefits of biofuels when blended into gasoline and diesel.\n                  <\/p>","DOI":"10.1039\/c5fd00205b","type":"journal-article","created":{"date-parts":[[2016,1,12]],"date-time":"2016-01-12T10:32:39Z","timestamp":1452594759000},"page":"121-136","update-policy":"https:\/\/doi.org\/10.1039\/rsc_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Biofuels, vehicle emissions, and urban air quality"],"prefix":"10.1039","volume":"189","author":[{"given":"Timothy J.","family":"Wallington","sequence":"first","affiliation":[{"name":"Research & Advanced Engineering"},{"name":"Ford Motor Company"},{"name":"Dearborn"},{"name":"USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James E.","family":"Anderson","sequence":"additional","affiliation":[{"name":"Research & Advanced Engineering"},{"name":"Ford Motor Company"},{"name":"Dearborn"},{"name":"USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eric M.","family":"Kurtz","sequence":"additional","affiliation":[{"name":"Research & Advanced Engineering"},{"name":"Ford Motor Company"},{"name":"Dearborn"},{"name":"USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul J.","family":"Tennison","sequence":"additional","affiliation":[{"name":"Research & Advanced Engineering"},{"name":"Ford Motor Company"},{"name":"Dearborn"},{"name":"USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"292","published-online":{"date-parts":[[2016]]},"reference":[{"key":"C5FD00205B-(cit1)\/*[position()=1]","volume-title":"Standard Specification for Biodiesel Fuel Blend Stock (B100) for Middle Distillate Fuels","author":"ASTM D6751-15b","year":"2015","unstructured":"ASTM D6751-15b\n          , Standard Specification for Biodiesel Fuel Blend Stock (B100) for Middle Distillate Fuels, ASTM International, West Conshohocken, PA, 2015"},{"key":"C5FD00205B-(cit2)\/*[position()=1]","volume-title":"BP Statistical Review of World Energy June 2015","year":"2015","unstructured":"BP Statistical Review of World Energy June 2015, British Petroleum, 2015, http:\/\/www.bp.com"},{"key":"C5FD00205B-(cit3)\/*[position()=1]","unstructured":"U.S. Energy Information Administration, Monthly Energy Review March 2015, http:\/\/www.eia.gov\/totalenergy\/data\/monthly"},{"key":"C5FD00205B-(cit4)\/*[position()=1]","volume-title":"Standard Specification for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-Ignition Engines","author":"ASTM International","year":"2011","unstructured":"ASTM International\n          , Standard Specification for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-Ignition Engines, ASTM D, 2011, pp. 5798\u201311, Rev"},{"key":"C5FD00205B-(cit5)\/*[position()=1]","doi-asserted-by":"publisher","DOI":"10.4271\/2009-01-2770","author":"Anderson","year":"2009","journal-title":"SAE Tech. 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