Fuel properties and emissions of soybean oil esters as diesel fuel |
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| Authors: | David Y. Z. Chang Jon H. Van Gerpen Inmok Lee Lawrence A. Johnson Earl G. Hammond Stephen J. Marley |
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| Affiliation: | (1) Department of Mechanical Engineering, Iowa State University, 50011 Ames, Iowa;(2) Center for Crops Utilization Research and Department of Food Science and Human Nutrition, Iowa State University, 50011 Ames, Iowa;(3) Department of Agriculture and Biosystems Engineering, Iowa State University, 50011 Ames, Iowa |
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| Abstract: | The effects of using blends of methyl and isopropyl esters of soybean oil with No. 2 diesel fuel were studied at several steady-state operating conditions in a four-cylinder turbocharged diesel engine. Fuel blends that contained 20, 50, and 70% methyl soyate and 20 and 50% isopropyl soyate were tested. Fuel properties, such as cetane number, also were investigated. Both methyl and isopropyl esters provided significant reductions in particulate emissions compared with No. 2 diesel fuel. A blend of 50% methyl ester and 50% No. 2 diesel fuel provided a reduction of 37% in the carbon portion of the particulates and 25% in the total particulates. The 50% blend of isopropyl ester and 50% No. 2 diesel fuel gave a 55% reduction in carbon and a 28% reduction in total particulate emissions. Emissions of carbon monoxide and unburned hydrocarbons also were reduced significantly. Oxides of nitrogen increased by 12%. |
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| Keywords: | Biodiesel diesel engine engine emissions engine performance fuel properties isopropyl ester methyl soyate particulate emissions winterization |
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