对聚合物改性青和热解油生产中废弃聚乙烯利用的比较生命周期评估
Witharanage Gayashani1, Mahinsasa Rathnayake1
1Department of Chemical and Process Engineering, University of Moratuwa, Katubedda, Sri Lanka.
概括
废聚乙烯 (PE) 可以用于聚合物改性青或热解油生产. 聚合物改性青节省能源,比热解更环保,提供可持续的废物管理解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 越来越多的塑料需求给全球的聚乙烯 (PE) 废物管理带来了挑战.
- 对废弃PE的有效利用策略对于可持续的废物管理至关重要.
- 生命周期评估 (LCA) 为评估废物管理选项对环境的影响提供了一个框架.
研究的目的:
- 为了比较两个废弃PE利用场景的生命周期材料流,能源消耗和环境影响:聚合物改性青生产和热解油生产.
- 通过标准的LCA方法来评估在这些应用中使用废弃PE的可行性.
- 确定最环保,最节能的废弃PE处理方法.
主要方法:
- 应用了标准生命周期评估 (LCA) 方法.
- 对处理1废物PE的材料流,能源流和环境影响进行了评估.
- 分析了两个场景: (1) 纳入聚合物改性青 (250/废PE) 和 (2) 热解油生产.
主要成果:
- 与传统青生产相比,在聚合物改性青中使用废弃PE可节省8.19%的能源.
- 热解油生产的净能量比率为1.07.
- 与热解相比,聚合物改性青生产表现出优越的环境性能,主要原因是产量参数的显著变化.
结论:
- 在聚合物改性青中利用废弃聚乙烯可以大大节省能源,并且比热解更环保.
- 该研究提供了关于废物PE管理选项生命周期影响的关键见解.
- 对LCA结果和灵敏度参数的进一步分析可以指导未来废物PE价值化实施策略.
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