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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/49904

Title: Emulsification characteristics of nano-emulsions of solketal in diesel prepared using microwave irradiation
Authors: Cherng-Yuan Lin
Shih-Ming Tsai
Contributors: 國立臺灣海洋大學:輪機工程學系
Keywords: Glycerol acetonide
Nano-emulsion
Microwave irradiation
Emulsification stability
Dispersed phase
Date: 2018-02
Issue Date: 2018-08-27T07:18:29Z
Publisher: Fuel
Abstract: Abstract: Glycerol acetonide, also termed solketal, which is chemically derived from bio-glycerol, was used as a combustion improver in the dispersed emulsion phase in this study. Nano-emulsions of ultra-low sulfur diesel (ULSD) containing nano-sized droplets of solketal were produced using microwave irradiation and compared with those produced by mechanical homogenizing. A non-ionic surfactant mixture of Tween 80 and Span 80, with a combined hydrophile-lipophile balance (HLB) adjusted to 10 by the weight proportion of the two surfactants was added to assist the emulsion formation. The characteristics of the emulsions produced using the two methods were analyzed and compared. The experimental results show that nano-emulsions can only form when up to 15 wt% of surfactant and no more than 5 wt% of solketal are added. The nano-emulsions from microwave irradiation had a larger mean droplet size, more concentrated one-peak distribution of droplet size, and lower kinematic viscosity and emulsification stability (ES) than those from the mechanical homogenizer. Higher solketal content in the emulsion increased the mean droplet size and kinematic viscosity of the nano-emulsions prepared using either method, and decreased the emulsification stability. The nano-emulsions with 3 wt% solketal in the dispersed phase also had superior characteristics including the lowest mean droplet size and highest ES. This is thus suggested to be the optimum composition.
Relation: 221(1) pp.165-170
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/49904
Appears in Collections:[輪機工程學系] 期刊論文

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