Supercritical Chemical Recycling of plastics with Continuous Mixture Kinetics

利用连续混合动力学进行塑料超临界化学回收

基本信息

批准号：
11694170
负责人：
GOTO Motonobu
金额：
$ 3.52万
依托单位：
Kumamoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

Experiments and the data analysis for decomposition of polymers such as PET and Nylon were carried out in supercritical fluid by using theoretical development of continuous mixture kinetics and theoretical calculation with computer software. As a theoretical study, molecular weight distribution was expressed by continuous distribution function. Continuous kinetics theory was developed to analyze the decomposition behavior. The theory includes molecular weight distribution (MWD) change of polymer by random and specific scissions and secondary reactions for monomer components. Change of MWD and monomers as a function of time was simulated by the continuous kinetics with Gamma distribution for MWD.To develop chemical recycling technology of plastics, degradation of plastics in supercritical water or methanol was studied. High pressure batch reactor or continuous flow reactor were used. As a sample of plastics, PET was adopted which is most recycled condensation polymerization plastics. Degradation of PET in supercritical methanol and supercritical water was investigated, to develop a chemical recycling process of waste plastics. Continuous kinetics analysis was applied to the experimental data. The MWD of the products was obtained as a function of reaction time. The yields of monomer components of the decomposition products including by-products were measured to clarify the reaction mechanism. Degradation of nylon 6 in supercritical water was also studied. Addition polymerization plastics as well as condensation polymerization plastics were decomposed in supercritical water. Continuous mixture kinetics were successfully applied to the analysis and simulation for plastics degradation in supercritical fluids.

通过使用连续混合动力学的理论开发和计算机软件的理论计算，在超临界流体中进行了聚合物（例如PET和尼龙）分解的实验和数据分析。作为一项理论研究，分子量分布通过连续分布函数表达。开发了连续动力学理论来分析分解行为。该理论包括通过随机和特定的剪裁和单体成分的次要反应对聚合物进行分子量分布（MWD）的变化。 MWD和单体随时间变化的变化是通过MWD的连续动力学进行了模拟的。使用高压批处理反应器或连续流动反应器。作为塑料样本，采用了最回收的凝结聚合塑料的PET。研究了PET在超临界甲醇和超临界水中的降解，以开发废物塑料的化学回收过程。连续动力学分析应用于实验数据。根据反应时间获得了产物的MWD。测量分解产物（包括副产品）的单体成分的产率，以阐明反应机制。还研究了尼龙6在超临界水中的降解。在超临界水中分解了添加聚合塑料以及凝结聚合塑料。连续混合动力学成功地应用于超临界流体中塑料降解的分析和模拟。