| EVA类降凝剂对生物柴油低温流动性的作用机理 |
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| 引用本文： | 李炎龙,王大鸷,韩生,谭凤芝,张绍印.EVA类降凝剂对生物柴油低温流动性的作用机理[J].大连工业大学学报,2011,30(5):365-368. |
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| 作者姓名： | 李炎龙 王大鸷 韩生 谭凤芝 张绍印 |
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| 作者单位： | 1. 大连工业大学化工与材料学院,辽宁大连,116034
2. 上海应用技术学院化学工程系,上海,200235 |
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| 基金项目： | 辽宁省教育厅创新团队项目(2008T011);上海市教委科研创新项目(09YZ387) |
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| 摘 要： | 通过预筛选试验确定了乙烯-醋酸乙烯酯(EVA)类降凝剂对生物柴油低温流动性的改善作用。采用差热分析(DSC)、低温X光衍射仪(XRD)、偏光显微镜等表征方法研究了EVA类降凝剂对生物柴油的降凝机理。实验结果表明,降凝剂加入生物柴油后没有减少蜡晶的析出量,而是通过与脂肪酸甲酯之间的共晶作用,改变了蜡晶的生长习性和聚集方式。蜡晶的外观呈现类球状,表现出优异的分散性,蜡晶之间不易交联,进而降低了生物柴油的冷滤点和冷凝点。
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| 关 键 词： | 生物柴油 乙烯-醋酸乙烯酯 降凝剂 冷滤点 冷凝点 |
Mechanism of EVA pour point depressant in biodiesel |
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| LI Yan-long,WANG Da-zhi,HAN Sheng,TAN Feng-zhi,ZHANG Shao-yin.Mechanism of EVA pour point depressant in biodiesel[J].Journal of Dalian Dalian Polytechnic University,2011,30(5):365-368. |
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| Authors: | LI Yan-long WANG Da-zhi HAN Sheng TAN Feng-zhi ZHANG Shao-yin |
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| Affiliation: | 1.School of Chemistry Engineering and Material,Dalian Polytechnic University,Dalian 116034,China; 2.Department of Chemistry Engineering,Shanghai Institute of Technology,Shanghai 200235,China |
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| Abstract: | The effect of ethylene-vinyl acetate(EVA) pour point depressant was determined on biodiesel by pre-screening.DSC,low temperature XRD and polarizing optical microscope were used to study the mechanism of ethylene-vinyl acetate pour point depressant(PPD) on soybean biodiesel.The results show that: PPD does not reduce the amount of wax crystals in biodiesel.Eutectic effect occurs between PPD and fatty acid methyl ester.PPD changes the growth habits and gathering way of the wax crystals.The wax crystals appear almost spherical,disperse better,not easy to crosslink between wax crystals and reduce the cold filter plugging point(CFPP) and solidification point(SP) of biodiesel. |
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| Keywords: | biodiesel ethylene-vinyl acetate pour point depressant CFPP SP |
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