Abstract
AbstractBiodiesel is a fuel comprising mono‐alkyl esters of medium to long‐chain fatty acids derived from vegetable oils or animal fats. Typically, engines operated on soybean‐based biodiesel exhibit higher emissions of oxides of nitrogen (NOx) compared with petroleum diesel. The increase in NOx emissions might be an inherent characteristic of soybean oil's polyunsaturation, because the level of saturation is known to affect the biodiesel's cetane number, which can affect NOx. A feedstock that is mostly monounsaturated (i.e. oleate) helps to balance the tradeoff between cold flow and oxidative stability. Genetic modification has produced a soybean event, designated 335‐13, with a fatty acid profile high in oleic acid (>85%) and with reduced palmitic acid (<4%). This high‐oleic soybean oil was converted to biodiesel and run in a John Deere 4045T 4.5‐L four‐stroke, four‐cylinder, turbocharged direct‐injection diesel engine. The exhaust emissions were compared with those from conventional soybean oil biodiesel and commercial No. 2 diesel fuel. There was a significant reduction in NOx emissions (α = 0.05) using the high‐oleic soybean biodiesel compared with regular soybean oil biodiesel. No significant differences were found between the regular and high‐oleic biodiesel for unburned hydrocarbon and smoke emissions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.