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首页> 外文期刊>Energy Conversion & Management >Cogeneration of biodiesel and nontoxic cottonseed meal from cottonseed processed by two-phase solvent extraction
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Cogeneration of biodiesel and nontoxic cottonseed meal from cottonseed processed by two-phase solvent extraction

机译：两相溶剂萃取处理棉籽中生物柴油和无毒棉籽的热电联产

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摘要

In the present work, the preparation of biodiesel from cottonseed oil produced by two-phase solvent extraction (TSE) was studied. The experimental results of TSE process of cottonseed showed that the optimal extraction conditions were 30 g samples, 240 mL extraction solvent mixture and methanol/petro-leum ether volume ratio 60:40, extraction temperature 30 ℃, extraction time 30 min. Under the extraction conditions, the extraction rate of cottonseed oil could achieve 98.3%, the free fatty acid (FFA) and water contents of cottonseed oil were reduced to 0.20% and 0.037%, respectively, which met the requirement of alkali-catalyzed transesterification. The free gossypol (FG) content in cottonseed meal produced from two-phase solvent extraction could reduce to 0.014% which was far below the FAO standard. And the nontoxic cottonseed meal could be used as animal protein feed resources. After the TSE process of cottonseed, the investigations were carried out on transesterification of methanol with oil-petroleum ether solution coming from TSE process in the presence of sodium hydroxide (CaO) as the solid base catalyst. The influences of weight ratio of petroleum ether to cottonseed oil, reaction temperature, molar ratio of methanol to oil, alkali catalyst amount and reaction time on cottonseed oil conversion were respectively investigated by mono-factor experiments. The conversion of cottonseed oil into fatty acid methyl ester (FAME) could achieve 98.6% with 3:1 petroleum ether/oil weight ratio, 65 ℃ reaction temperature, 9:1 methanol/oil mole ratio, 4% (catalyst/oil weight ratio, w/w) solid base catalyst amount and 3 h reaction time. The properties of FAME product prepared from cottonseed oil produced by two-phase solvent extraction met the ASTM specifications for biodiesel.
机译：在目前的工作中，研究了通过两相溶剂萃取（TSE）生产的棉籽油制备生物柴油。棉籽TSE工艺的实验结果表明，最佳提取条件为30 g样品，240 mL提取溶剂混合物和甲醇/石油醚体积比60:40，提取温度30℃，提取时间30 min。在提取条件下，棉籽油的提取率可达到98.3％，棉籽油的游离脂肪酸（FFA）和含水量分别降低到0.20％和0.037％，满足碱催化的酯交换反应的要求。通过两相溶剂萃取生产的棉籽粕中的游离棉酚含量可降低至0.014％，远低于粮农组织的标准。无毒棉籽粉可用作动物蛋白饲料资源。在棉籽的TSE工艺之后，在氢氧化钠（CaO）作为固体碱催化剂存在下，对甲醇与TSE工艺制得的石油-石油醚溶液进行酯交换反应进行了研究。通过单因素实验研究了石油醚与棉籽油的重量比，反应温度，甲醇与油的摩尔比，碱催化剂用量和反应时间对棉籽油转化率的影响。棉油比为3：1的石油醚/油比，65℃的反应温度，9：1的甲醇/油摩尔比，4％（催化剂/油比）时，棉籽油向脂肪酸甲酯的转化率可达到98.6％。 ，w / w）固体碱催化剂的量和3小时反应时间。由棉籽油通过两相溶剂萃取制得的FAME产品的性能符合生物柴油的ASTM规范。

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  • 来源
    《Energy Conversion & Management》 |2010年第12期|P.2750-2756|共7页
  • 作者

    Junfeng Qian; Zhi Yun; Haixian Shi;

  • 作者单位

    Jiangsu Provincial Key Laboratory of Fine Petrochemical Engineering, Jiangsu Polytechnic University, Changzhou 213016, PR China College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China;

    rnCollege of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China;

    rnCollege of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    biodiesel; fatty acid methyl ester; two-phase solvent extraction; cottonseed oil; free gossypol; nontoxic cottonseed meal;

    机译：生物柴油脂肪酸甲酯两相溶剂萃取;棉籽油;免费的棉酚;无毒棉籽粉;

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