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Modeling the effect of wall capacitance on the dynamics of an exothermic reaction system in a batch reactor

机译:在分批反应器中模拟壁电容对放热反应系统动力学的影响

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摘要

The chemical reactors in certain range of operating conditions may exhibit parametric sensitivity where small changes in one or more of the input parameters lead to large changes in the output variable. This is a form of critical behavior that leads to runaway conditions, resulting in hazardous reactor operation. In the present work, hydrolysis of acetic anhydride reaction was used to investigate the existence and effect of parametric sensitivity with respect to the input parameters, namely cooling water flow rate, cooling water feed temperature and wall capacitance. Parametric sensitivity was observed for a small change in coolant water flow rate and feed temperature. It is found experimentally that with the introduction of extraneous wall capacitance, the batch reactor showed non-sensitivity under parametric sensitivity conditions. A mathematical model for the reactor was developed by incorporating both mass and energy balance with ordinary coupled differential equations. This dynamic model was solved numerically using 0DE15s (gear method) of Matlab software, and the numerically simulated results are in satisfactory agreement with the experimental data.
机译:在某些操作条件范围内的化学反应器可能会表现出参数敏感性,其中一个或多个输入参数的微小变化会导致输出变量的较大变化。这是一种严重的行为形式,会导致失控状态,从而导致危险的反应堆运行。在目前的工作中,使用乙酸酐反应的水解来研究参数敏感性相对于输入参数(冷却水流速,冷却水进料温度和壁电容)的存在和影响。对于冷却水流量和进料温度的微小变化,观察到了参数灵敏度。实验发现,随着外部壁电容的引入,间歇式反应器在参数灵敏度条件下表现出非灵敏度。通过将质量平衡和能量平衡与普通耦合的微分方程相结合,开发了反应堆的数学模型。使用Matlab软件的0DE15s(齿轮法)对动力学模型进行了数值求解,数值模拟结果与实验数据吻合良好。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2011年第3期|p.439-446|共8页
  • 作者单位

    Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;

    Department of Chemical Engineering, Dharmsinh Desai Institute of Technology, Nadiad 387001, Gujarat, India;

    Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;

    Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia,Department of Chemical Engineering, Indian Institute of Technology (IIT), Kharagpur, P.O. Kharagpur Technology, West Bengal 721302, India;

  • 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

    runaway reactions; parametric sensitivity; wall capacitance; input parameters;

    机译:失控的反应;参数灵敏度壁电容输入参数;

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