生物柴油/柴油乙醇水微乳体系相行为分析  

Phase behavior of biodiesel/diesel-ethanol-water micro-emulsion system

作　　者：阮登芳[1] 王文彬[1] 李强军[1] 刘波[1] 樊茜婷[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《重庆大学学报（自然科学版）》2011年第6期46-50,共5页Journal of Chongqing University

基　　金：重庆市自然基金资助项目(2008BB7050);重庆市科技攻关计划资助项目(2008AA6024)

摘　　要：采用化学滴定方法研究了生物柴油/柴油乙醇水微乳体系的相行为;分析比较了生物柴油/柴油混合比改变对其相行为的影响。结果表明:在不添加任何乳化剂的条件下,稳态相图中存在一个各向同性的单相区,单相区内混合液为稳定、透明的生物柴油/柴油乙醇水微乳化油,表明生物柴油可作为有效的表面活性剂;单相区的面积大小与体系中各组分的含量有关。当乙醇含量及生物柴油与柴油的混合比增加时,单相区变宽;在乙醇含量一定时,形成稳定单相微乳化油的最大掺水量随体系中生物柴油的含量增加而增加。最后得到了不同乙醇含量及不同生物柴油与柴油混合比条件下形成生物柴油/柴油乙醇水微乳化油的最大掺水量。The phase behavior of the biodiesel/diesel-ethanol-water micro-emulsion system is investigated with chemical titration, and the effect of the biodiesel to diesel ratio on the phase behavior is analyzed. The results indicate that there exists an isotropic single-phase region in which the system formulates stable iso- tropic micro-emulsions consisting of biodiesel, diesel, ethanol and water without involving any surfactants, which reveals that biodiesel can be used successfully as a surface-active agent, and that the single-phase area depends on the concentrations of different components. At higher ethanol concentrations and higher ratios of biodiesel to diesel, the width of single-phase area is increased and the maximum limit of water dissolved in the mixture of biodiesel-diesel-ethanol which form a stable single-phase micro-emulsion is increased with higher biodiesel concentrations in the case of a constant ethanol quantity. Finally, the maximum limit of dissolved water in the mixture of different components is obtained.

关 键 词：生物柴油 柴油 三元相图 微乳化 相行为 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]