Cow-urine emulsified diesel fuel: preparation, stability, and rheological study for diesel engine application
Environmental Science and Pollution Research(2024)
Abstract
Water-diesel emulsion fuel has been found as a prominent alternative fuel by various researchers. Alike this technology, cow-urine (Bos indicus urine) emulsified diesel fuel (GMD emulsion) has been explored in this study. Making of homogeneous and stable emulsion is a crucial aspect in this approach while maintaining the diesel standards. Hence, the applicability of this fuel has been examined based on physicochemical properties for diesel engine application. The stability was assessed by creaming index, droplet size, Pdi, and interfacial tension. The minimum droplet size (278 nm) and 0.282 Pdi was obtained with 5.72 HLB value, 4% (v/v) surfactant, and 10% (v/v) of cow-urine through ultra-sonication. The optimized 10% GMD emulsion was found stable for more than 80 days. Viscosity and density of the fuel got increased with cow-urine and surfactant; however, they found within the standard limits. The physicochemical analysis exhibited the feasibility of the GMD emulsion for diesel engine application.
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Key words
Diesel,Emulsion,Cow-urine,Surfactant,HLB value,Viscosity,Gomutra
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