Abstract: Microemulsion is the promising techniques that can be used to reduce vegetable oil viscosity. In this study, microemulsion-based biofuel consisting of vegetable oil/diesel blends, ethanol and surfactant/cosurfactant mixture were formulated. The goal of this work focuses on the effects of a numbers of ethylene oxide group, EOn (n =1, 5, and 9) in nonionic alcohol ethoxylate surfactant and the effect of cosurfactant structures, straight chain (1-octanol) and branch chain alcohols (2-ethyl-1-hexanol) to reverse micelle microemulsion fuel formation. In addition, biodiesel and bioethanol were used to replace diesel and ethanol, receptively with the aim to formulated microemulsion fuels with absolute bio-based product. The kinematic viscosity which was selected as a key parameter was determined at 40 oC (ASTM D445). The microemulsion aggregate size was investigated as a parameter affecting by numbers of EO groups in nonionic surfactant. The results show that, no observed trend in kinematic v

• Publication Date: 09-Mar-2014
• DOI: 10.15224/978-1-63248-001-9-22
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Abstract: Rhamnolipid biosurfactant modified-surfaces were prepared to adsolubilize styrene in their admicellar structures with and without a coupling of linker molecules; three systems of alcohol containing different number of carbon atoms in alkyl chain (1-butanol, 1-octanol and 1-dodecanol). The effects of linker molecules to styrene adsolubilization on the rhamnolipid biosurfactant modified-surface were investigated. The partitioning of styrene into an admicelle is described by the admicellar partition coefficient (Kadm). Results showed that rhamnolipid biosurfactant with the present of linker molecules had the larger Kadm value than those containing of surfactant alone (Kadm= 3042). In addition, Kadm values increased with respect to the carbon atoms in alcohol molecules. In considering the effect of linker molecules, the Kadm for the mixture of dodecanol (12-Carbon), octanol (8-Carbon) and butanol (4-Carbon) were 4070, 3759 and 3612, respectively. The result indicated that the adsolubilizat

• Publication Date: 09-Mar-2014
• DOI: 10.15224/978-1-63248-001-9-23
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