Mechanism of formation and evaporation reaction of metal oychlorides

金属酰氯化物的形成和蒸发反应机理

基本信息

批准号：
18360364
负责人：
TSUKIHASHI Fumitaka
金额：
$ 10.69万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360364/
关键词：
recycling chloride oxychloride zinc thermodynamics reaction kinetics chlorination reaction steelmaking dust

项目摘要

The purpose of present research is to clarify the formation reaction mechanism of the oxychloride compounds which are formed during the processing of waste materials and the recycling process. The fundamental data of thermodynamic properties of the free energies of formation of zinc and lead oxychlorides and of the kinetics of formation and evaporation of oxychlorides were observed.The metals observed in the present research are zinc and lead. To clarify the formation and evaporation mechanism of metal oxychloride, the chlorination and evaporation of behaviors of metal oxides were investigated by using transpiration method at high partial pressure of oxygen. The weight change of metal oxides in an alumna crucible during chlorination reaction was observed with changing partial pressures of oxygen and chlorine and the partial pressures of oxychlorides were obtained. Based on the observed results, the Gibbs free energies of the formation of zinc and lead oxychlorides were calculated.Furthermore, the weight change of zinc and lead oxides in an alumina crucible by chlorination reaction with time was obtained. The kinetics of chlorination and the evaporation reaction of oxides were analyzed and the reaction mechanism was clarified. The chlorination rate slightly increased with increasing oxygen partial pressure. These phenomena were explained by the formation of zinc oxychloride during evaporation reaction. The stable species of zinc and lead oxychlorides were clarified.It can be concluded that the effective recycling process of resources from the waste materials such as steelmaking dust etc. which contains valuable metals of zinc and lead etc. is possible by using chlorination reaction.

当前研究的目的是阐明在废料处理过程中形成的氧化氯化物化合物的形成反应机理和回收过程。观察到了锌和氧氯化物的形成和蒸发的热力学特性的基本数据。在本研究中观察到的金属是锌和铅。为了阐明金属氧化氯化物的形成和蒸发机制，使用蒸馏法在高氧的高压力下，研究了金属氧化物行为的氯化和蒸发。通过氧气和氯的部分压力变化，在氯化反应过程中观察到了校友坩埚中金属氧化物的重量变化，并获得了氧氯化物的部分压力。根据观察到的结果，计算了锌和氧氯化物铅的吉布斯自由能。分析了氯化的动力学和氧化的蒸发反应，并阐明了反应机制。氯化速率随氧局部压力的增加而略有增加。这些现象是通过在蒸发反应过程中形成氧化氯化锌的解释的。可以得出结论，可以通过氯化反应来阐明锌和氧化氯化物的稳定物种。可以得出结论。