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Measuring the characteristic parameters of VOC emission from paints

机译：测量涂料中VOC排放的特征参数

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摘要

The emission characteristic parameters of volatile organic compounds (VOCs) from paints are the initial concentration, the diffusion coefficient and the paint/air partition coefficient. It is necessary to determine these parameters for fully understanding the emission behaviors as well as for source control. Based on detailed mass transfer analysis of VOC emissions from paints, a novel method is developed to measure these parameters, which owns the following merits: (1) the diffusion coefficient and partition coefficient can be simultaneously determined; (2) it takes less than 12 h for the cases studied and indicates high measurement accuracy (R~2 in the range of 0.921-0.939). Ventilated chamber experiments are performed to obtain the two parameters of methylcyclohexane and toluene emissions from one kind of solvent-based paint. The effectiveness of the method is verified by the good agreement between model predictions based on the determined characteristic parameters and experiments. The present approach is then applied to analyze the experimental data in the literature, and good results are also obtained, which further demonstrates that the approach is convincing and reliable. Our new approach should prove useful for rapid prediction and characterization of VOC emissions from paints as well as from other wet materials.
机译：涂料中挥发性有机化合物（VOC）的排放特征参数为初始浓度，扩散系数和涂料/空气分配系数。必须确定这些参数，以充分了解排放行为以及进行源控制。在详细分析涂料中挥发性有机化合物排放量的传质分析基础上，提出了测量这些参数的新方法，它具有以下优点：（1）可以同时确定扩散系数和分配系数； （2）在所研究的情况下花费的时间少于12小时，表明测量精度高（R〜2在0.921-0.939的范围内）。进行通风室实验，以从一种溶剂型涂料中获得甲基环己烷和甲苯排放的两个参数。通过基于确定的特征参数的模型预测与实验之间的良好一致性，验证了该方法的有效性。然后将该方法应用于文献中的实验数据分析，并取得了良好的效果，进一步证明了该方法具有说服力和可靠性。我们的新方法应被证明可用于快速预测和表征油漆以及其他湿材料中VOC的排放。

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