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Esterification kinetics of free fatty acids with supercritical methanol for biodiesel production

机译：游离脂肪酸与超临界甲醇在生物柴油生产中的酯化动力学

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摘要

Non-catalytic esterification of Free Fatty Acids (FFA) with supercritical methanol was studied under reaction conditions of (250-320 ℃) at 10 MPa. A detailed experimental programme was implemented to investigate the influence of temperature, stirring rate and the molar ratio of methanol to FFA in the feed in a batch-type reaction vessel. The esterification products of FFA with supercritical methanol are Fatty Acids Methyl Esters (FAME; biodiesel) and water. The yield of FAME was found to increase with an increase in temperature, and with an increase in the molar ratio of methanol to FFA. At >850 rpm the yield of FAME was not affected by stirring rate. The rate constants and energy of activation have been numerically evaluated by solving an ordinary differential equation that describes the reaction kinetics. The proposed kinetic model shows a reversible second order reaction and represents all the experimental data satisfactorily, providing deeper insight into the kinetics of the reaction.
机译：研究了在250-320℃，10 MPa的反应条件下，超临界甲醇对游离脂肪酸（FFA）的非催化酯化反应。实施了详细的实验程序，以研究温度，搅拌速度以及甲醇在分批式反应器中进料中FFA的摩尔比的影响。 FFA与超临界甲醇的酯化产物是脂肪酸甲酯（FAME；生物柴油）和水。发现FAME的产率随着温度的增加以及甲醇与FFA的摩尔比的增加而增加。在> 850 rpm时，FAME的收率不受搅拌速度的影响。通过求解描述反应动力学的常微分方程，对速率常数和活化能进行了数值评估。所提出的动力学模型显示出可逆的二级反应，并且令人满意地表示了所有实验数据，从而提供了对反应动力学的更深入了解。

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  • 来源
    《Energy Conversion & Management》 |2010年第5期|p.1055-1059|共5页
  • 作者

    R. Alenezi; G.A. Leeke; J.M. Winterbottom; R.C.D. Santos; A.R. Khan;

  • 作者单位

    School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;

    School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;

    School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;

    School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;

    Department of Environment Technology and Management, College for Women, Kuwait University, PO Box 5969, Safat 13060, Kuwait;

  • 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

    free fatty acids; supercritical methanol; esterification; kinetics; modelling;

    机译：游离脂肪酸;超临界甲醇酯化动力学;造型;

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