Early-Stage Emissions of Formaldehyde and Volatile Organic Compounds from Building Materials: Model Development, Evaluation, and Applications
Early-Stage Emissions of Formaldehyde and Volatile Organic Compounds from Building Materials: Model Development, Evaluation, and Applications
复制标题
建筑材料中甲醛和挥发性有机化合物的早期排放：模型开发、评估和应用
DOI：
10.1021/acs.est.2c04572
复制
发表时间：
2022-09-16
影响因子：
11.4
通讯作者：
Cao，Jianping
中科院分区：
文献类型：
--
作者：
Liu，Ningrui;Zhang，Xu;Cao，Jianping
建筑材料中甲醛和挥发性有机化合物（VOC）的排放可能导致室内空气质量差。排放过程随时间可分为三个阶段：早期、过渡和平衡阶段。在现有的研究中，不区分早期和过渡阶段的传质模型被广泛用于表征甲醛/VOC排放，这些模型涉及三个关键参数。已经提出了许多方法来确定这些参数，通过拟合相应的模型的实验数据。然而，如果在早期阶段获得实验数据（以缩短实验时间），则多组最佳拟合参数可能共存。因此，我们建立了一个新的传质模型来描述早期的排放假设的建筑材料作为半无限介质。新模型表明，早期排放仅由两个参数控制，而不是三个参数，这解释了现有方法的多解问题的原因。随后，阐明了前期模型的应用条件，表明前期在甲醛/VOCs排放中非常普遍。最后，提出了一种新的方法来表征甲醛/挥发性有机化合物的排放量从建筑材料，以消除多解问题的负面影响。
Emissions of formaldehyde and volatile organic compounds (VOCs) from building materials may result in poor indoor air quality. The emission process can be divided into three stages over time: early, transition, and equilibrium stages. In existing studies, mass transfer models without distinguishing the early and transition stages have been widely used for characterizing the formaldehyde/VOC emissions, with three key parameters involved in these models. Many methods have been proposed for determining these parameters by fitting the corresponding models to experimental data. However, multiple groups of best-fit parameters might coexist if experimental data are obtained at the early stage (to shorten the experimental time). Therefore, we developed a novel mass transfer model to describe the early-stage emissions by assuming the building material as semi-infinite medium. The novel model indicated that the early-stage emission was governed by only two parameters, instead of three parameters, which explained the reason for the multi-solution problem of existing methods. Subsequently, the application condition of the early-stage model was clarified, showing that the early stage was very common in the emissions of formaldehyde/VOCs. Finally, a novel approach for characterizing the emissions of formaldehyde/VOCs from building materials was proposed to eliminate the negative effects of the multi-solution problem.