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Application of near infrared spectroscopy to predict the average droplet size and water content in biodiesel emulsions

机译：应用近红外光谱法预测生物柴油乳液中的平均液滴尺寸和含水量

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摘要

NIR spectroscopy was used to predict the average droplet size and water content in water/biodiesel emulsions. The emulsions were prepared from industrial biodiesel obtained from soybean oil (85 wt%) and animal fat (15 wt%) by methylic route. NIR spectra was collected in the transmittance mode with the diffuse reflectance technique. Based on the NIR spectroscopy results, it can be pointed out that this methodology has the sensibility to infer the droplet size and water content in the biodiesel emulsions. Two techniques were used to obtain the multivariate models: the partial least squares (PLS) and artificial neural network (ANN) models. Satisfactory values of mean error for the external validation were obtained, with 9.53% to PLS model for average droplet size and 8.79% for water content, since they are close to the experimental standard deviation. The performance of ANN models demonstrated that this technique allowed the prediction of average droplet size and water content with mean errors of 6.10% and 13.20%, respectively. These errors are close to the analytical error associated to the method used indicating that the NIR spectroscopy is a good alternative to be used for this purpose.
机译：NIR光谱用于预测水/生物柴油乳液中的平均液滴尺寸和水含量。该乳液是通过工业生物柴油通过甲基途径从大豆油（85 wt％）和动物脂肪（15 wt％）获得而制备的。使用漫反射技术以透射模式收集NIR光谱。基于近红外光谱结果，可以指出该方法具有推断生物柴油乳剂中液滴尺寸和水含量的敏感性。两种技术用于获取多元模型：偏最小二乘（PLS）模型和人工神经网络（ANN）模型。对于外部验证，获得了令人满意的平均误差值，其中PLS模型的平均液滴尺寸为9.53％，水分含量为8.79％，因为它们接近实验标准偏差。 ANN模型的性能表明，该技术可以预测平均液滴尺寸和含水量，平均误差分别为6.10％和13.20％。这些误差接近于与所用方法相关的分析误差，表明NIR光谱法是用于此目的的良好替代方案。

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  • 来源
    《Fuel》 |2013年第11期|546-552|共7页
  • 作者

    Marlene Bampi; Agnes de P. Scheer; Fernanda de Castilhos;

  • 作者单位

    Department of Chemical Engineering, Parana Federal University (UFPR), 81531-990 Curitiba, PR, Brazil;

    Department of Chemical Engineering, Parana Federal University (UFPR), 81531-990 Curitiba, PR, Brazil;

    Chemical Engineering Department, Federal University of Santa Maria, Av. Roraima, 1000, 97105-900 Santa Maria, RS, Brazil Department of Chemical Engineering, Parana Federal University (UFPR), 81531-990 Curitiba, PR, Brazil;

  • 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; NIR spectroscopy; Emulsion; Droplet size; Water content;

    机译：生物柴油近红外光谱乳液;液滴尺寸含水量;

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