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使用亚临界到超临界处理废弃计算机外塑料的可行方法:统计建模和优化

Amrita Preetam¹, Uma Dwivedi¹, S N Naik²

¹Supercritical Fluid Extraction Laboratory, Centre for Rural Development and Technology, IIT Delhi, 110016, India; Catalytic Reaction Engineering Laboratory, Chemical Engineering Department, Indian, IIT Delhi, 110016, India.

Journal of environmental management

|July 8, 2023

概括

使用亚临界到超临界 (SCA) 回收电子垃圾塑料有效降解废计算机外. 这种方法可以获得高达87.89%的石油,回收有价值的化学物质并解决塑料污染问题.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
化学工程是化学工程的重要组成部分.

背景情况:

电子废物 (电子废物) 由于技术的快速进步,越来越多的环境和健康问题.
电子废物的塑料部分 (20-30%) 在回收工作中经常被忽视,主要集中在金属回收上.
迫切需要有效和环保的回收电子垃圾塑料的方法.

研究的目的:

调查废弃计算机外塑料 (WCCP) 的降解,使用亚临界到超临界 (SCA).
优化过程以获得最大的石油产量,并对回收产品进行表征.
探索电子垃圾塑料回收的SCA过程的环境和经济可行性.

主要方法:

使用亚临界到超临界的乙 (SCA) 进行塑料降解.
采用响应表面方法 (RSM) 的中央复合设计 (CCD) 进行参数优化.
使用TGA,CHNS,ICP-MS,FTIR,GC-MS,炸弹热量计,XRF和FESEM等技术进行特征化料和产品.

主要成果:

在最佳条件下 (300°C,120分钟,0.05S/L比率,0.5gNaOH) 实现了87.89%的最大石油产量.
确定液体产品 (油) 主要是单环和双环芳香和含氧化合物,其中异作为重要成分.
证明NaOH的添加提高了降解和除效率.

结论:

亚临界到超临界的乙 (SCA) 为回收电子废物的塑料部分提供了一种有希望和环保的方法.
该过程有效地从废弃计算机外塑料 (WCCP) 中回收有价值的化学物质.
对降解机制,分布和经济可行性的进一步探索支持了这种回收方法的潜力.

关键词:

电子垃圾 (E-Waste) 是一种电子垃圾.更绿色的方法更绿色的方法材料的回收利用材料的回收利用亚临界-超临界乙.废弃电脑外塑料废弃电脑外塑料

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