亚临界水热反应处置固体废弃物中水介质及碱作用的研究进展

发布时间：2018-10-12 16:46

【摘要】：针对水热反应处置固体废弃物的亚临界水热环境,综述了水介质和碱作用的研究进展。水介质是水热反应中不可或缺的介质环境和反应载体,在亚临界水热处置固体废弃物体系中,水介质的离子积随温度的升高、压力的增加而急剧增大;水介质压强与填充度的关系不显著;水介质密度随压力变化不明显,主要由温度控制;水介质与产物的相关关系,符合水热反应"生长基元"模型。碱的引入,不但可以提高固体废弃物在水热溶液中的溶解度,且提高了其溶解度温度系数;不同阳离子及碱浓度均会对反应进程和反应产物产生重要影响。亚临界水热反应中水介质和碱的作用是固体废弃物水热反应的基础,对提高固体废弃物水热资源化的效果及进程具有重要作用。
[Abstract]:In view of the subcritical hydrothermal environment of solid waste disposal by hydrothermal reaction, the research progress of water medium and alkali action is reviewed. Water medium is an indispensable medium environment and reaction carrier in hydrothermal reaction. In the subcritical hydrothermal treatment of solid waste system, the ionic product of water medium increases sharply with the increase of temperature and pressure. The relationship between the pressure of water medium and the filling degree is not significant, the density of water medium is not obvious with the pressure, and is mainly controlled by temperature, and the correlation between the water medium and the product accords with the "growth unit" model of hydrothermal reaction. The introduction of alkali can not only improve the solubility of solid waste in hydrothermal solution, but also increase the temperature coefficient of solubility, and different cations and alkali concentrations will have an important effect on the reaction process and reaction products. The action of water medium and alkali in the subcritical hydrothermal reaction is the basis of the hydrothermal reaction of solid waste and plays an important role in improving the effect and process of the hydrothermal recycling of solid waste.
【作者单位】：同济大学先进土木工程材料教育部重点实验室;同济大学材料科学与工程学院;
【基金】：“十三五”国家重点研发计划重点专项(2016YFC0700802) 国家自然科学基金(51478328) 中央高校基本科研业务费专项资金(0500219225)
【分类号】：X705

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