焚烧过程中氯代芳构化合物在活性炭上的迁移转化机制

工业焚烧过程中非故意产生的POPs已成为我国环境中POPs的主要来源。包括二恶英在内的氯代芳构化合物成为POPs的典型代表。活性炭吸附是焚烧设施普遍采用的尾气净化方法。本项目针对活性炭吸附法在实际应用中出现的问题进行深入探讨，拟开展氯代芳构化合物在活性炭上的迁移转化行为研究。确定氯代芳构化合物在活性炭上发生迁移转化反应的影响因素，建立活性炭吸附氯代芳构化合物的热力学、动力学模型，获得多元吸附的最优参数；模拟“De novo”和前驱体生成，证实烟气净化过程中氯代芳构化合物的来源；研究活性炭对氯代芳构化合物的脱除及影响因素，确定活性炭对“记忆效应”的贡献机制；研究焚烧过程中氯代芳构化合物在气-粒相上的质量分配，建立分配模型。基于获得的实验结果，揭示氯代芳构类化合物在活性炭上的迁移转化机制，确定焚烧烟气中氯代芳构化合物形成的关键控制因素，为研发更为高效的焚烧源POPs消减技术提供理论支持。

The emission of UP-POPs from industrial thermal processes is the main source of POPs in China. Chlorinated aromatic compounds are the typical representatives of POPs. Activated carbon adsorption is very effective in removing pollutants from flue gas. In this project, the application of the activated carbon adsorption will be discussed in depth. The migration and transformation behavior of chlorinated aromatic hydrocarbons on activated carbon will be studied. Meanwhile, the factors influencing the migration and transformation of chlorinated aromatic hydrocarbons on activated carbon will be determined. The corresponding thermodynamic and kinetic models will be developed. And the optimal parameters for multi-component adsorption of chlorinated aromatic hydrocarbons on activated carbon will be obtained. The pathway of chlorinated aromatic hydrocarbons formation in flue gas through De novo synthesis or precursor synthesis will be determined. Desorption characteristics of chlorinated aromatic hydrocarbons over activated carbon and the corresponding influencing factors will be studied to determine the contribution of activated carbon to "memory effect". Meanwhile, the gas/particle concentrations and distributions of POPs in the flue gas will be studied.