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首页> 外文期刊>Energy Conversion & Management >An optimization study on transesterification catalyzed by the activated carbide slag through the response surface methodology
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An optimization study on transesterification catalyzed by the activated carbide slag through the response surface methodology

机译：响应面法优化活性炭渣催化酯交换反应的研究

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摘要

After activated at 850 ℃ under air condition, calcium hydroxide and calcium carbonate in carbide slag are transformed into calcium oxide. The prepared transesterification catalyst, labeled as CS-850, gains surface area of 8.00 m~2g~(-1) functional groups of vanishing O-C-O and O-H bonds, surface morphology of tenuous branch and porous structure and basic strength of 9.8 ＜ H_ ＜ 15.0. From aspects of the molar ratio of methanol to oil (γ), the catalyst added amount (ζ) and the reaction temperature (T_), transesterification catalyzed by CS-850 is optimized through the Box-Behnken design of the response surface methodology (BBD-RSM). A quadratic polynomial model is preferred for transesterification efficiency prediction with coefficient of determination (R~2) of 0.9815. The optimal parameters are predicted to be γ = 13.8, ζ = 6.7% and T_ - 60 ℃ with the efficiency of 94.70% and validated by experimental value of 93.83%. Meanwhile, γ is demonstrated to be the most significant variable for the minimum p-value. Besides, CS-850 performs acceptable reusability and for the fifth time reusage, efficiency of 82.61% could still be supplied. Aluminium oxide is proved to have the greatest effect on the catalytic activity of CS-850 among other small quality oxides. Physicochemical properties of the purified biodiesel meet American Society for Testing and Material (ASTM) standard.
机译：在空气中于850℃活化后，电石渣中的氢氧化钙和碳酸钙转化为氧化钙。制备的标记为CS-850的酯交换催化剂的表面积为8.00 m〜2g〜（-1），其中OCO和OH键消失，官能团的表面形态呈微弱的分支和多孔结构，基本强度为9.8 ＜H_ ＜15.0 。从甲醇与油的摩尔比（γ），催化剂添加量（ζ）和反应温度（T_）方面，通过响应面方法的Box-Behnken设计优化了CS-850催化的酯交换反应（ BBD-RSM）。二次多项式模型对于酯交换效率的预测是优选的，确定系数（R〜2）为0.9815。预测最佳参数为γ= 13.8，ζ= 6.7％和T_-60℃，效率为94.70％，并通过实验值93.83％进行了验证。同时，对于最小的p值，γ是最重要的变量。此外，CS-850具有可接受的可重复使用性，并且对于第五次重复使用，仍可提供82.61％的效率。事实证明，在其他小型氧化物中，氧化铝对CS-850的催化活性影响最大。纯化的生物柴油的理化性质符合美国材料试验学会（ASTM）标准。

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  • 来源
    《Energy Conversion & Management》 |2015年第3期|498-506|共9页
  • 作者

    Mengqi Liu; Shengli Niu; Chunmei Lu; Shiqing Cheng;

  • 作者单位

    School of Energy and Power Engineering, Shandong University, No. 17923 Jingshi Road, Lixia District, Jinan 250061, China;

    School of Energy and Power Engineering, Shandong University, No. 17923 Jingshi Road, Lixia District, Jinan 250061, China;

    School of Energy and Power Engineering, Shandong University, No. 17923 Jingshi Road, Lixia District, Jinan 250061, China;

    School of Energy and Power Engineering, Shandong University, No. 17923 Jingshi Road, Lixia District, Jinan 250061, 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; Transesterification; Catalyst; Carbide slag; Response surface methodology;

    机译：生物柴油酯交换;催化剂;硬质合金渣响应面方法;

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