Exhaust emissions and fuel properties of partially hydrogenated soybean oil methyl esters blended with ultra low sulfur diesel fuel |
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Authors: | Bryan R. Moser Aaron Williams Michael J. Haas Robert L. McCormick |
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Affiliation: | 1. United States Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, 1815 N University St, Peoria, IL 61604, United States;2. United States Department of Energy, National Renewable Energy Laboratory, ReFUEL Laboratory, 1617 Cole Blvd, Golden, CO 80401, United States;3. United States Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 E Mermaid Ln, Wyndmoor, PA 19038, United States |
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Abstract: | Important fuel properties and emission characteristics of blends (20 vol.%) of soybean oil methyl esters (SME) and partially hydrogenated SME (PHSME) in ultra low sulfur diesel fuel (ULSD) were determined and compared with neat ULSD. The following changes were observed for B20 blends of SME and PHSME versus neat ULSD: improved lubricity, higher kinematic viscosity and cetane number, lower sulfur content, and inferior low-temperature properties and oxidative stability. With respect to exhaust emissions, B20 blends of PHSME and SME exhibited lower PM and CO emissions in comparison to those of neat ULSD. The PHSME blend also showed a significant reduction in THC emissions. Both SME and PHSME B20 blends yielded small increases in NOx emissions. The reduction in double bond content of PHSME did not result in a statistically significant difference in NOx emissions versus SME at the B20 blend level. The test engine consumed a greater amount of fuel operating on the SME and PHSME blends than on neat ULSD, but the increase was smaller for the PHSME blend. |
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Keywords: | Biodiesel Diesel fuel Exhaust emissions Fatty acid methyl esters Physical properties Soybean oil methyl esters |
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