Preparation and properties of micro emulsified diesel

Key words:  diesel fuels  micro emulsified diesel  non ionic surface active agent  stability  emission

Abstract:

According to micro emulsification theories, sorbitan oleate (span 80), sorbitan stearate (span 60), polyoxyethylene sorbitan palmitate (tween 40), polyoxyethylene alkylphenol ether (OP 10), petroleum sodium naphthenate (PSN) were used as the main emulsifiers, and low carbon chain alcohol as emulsifier auxiliaries to prepare clear micro emulsified diesel. The properties of micro emulsified diesel were investigated. The results show that the clear micro emulsified diesel can be obtained by span 80, tween 40 and OP 10 combination. The percentage of water in micro emulsified diesel can reach up to 10%-12% when the mass ratio of emulsifier and oil is 5% and the volume ratio of associated emulsifier and oil is 2%. The prepared micro emulsified diesel can be stored at 80 ℃ and at 5 ℃ for 48 h, no phase separation was observed. The technology indexes of micro emulsified diesel including density, kinematic viscosity, flash point and cetane number are fitting to GB/T 19147 2003. The micro emulsified diesel can reduce CO by 57.1% and PM by 30%-40% in the exhaust emissions compared to GB diesel, while the power of engine can keep almost the same power as GB diesel.