慢热解产品来源于从废弃的煤细和回收塑料中生产的挤出物中获得的慢热解产品作为粘合剂
Carel Marais1, John R Bunt1, Nthabiseng T Leokaoke1
1Centre of Excellence in Carbon-Based Fuels, North-West University, Potchefstroom Campus, Private Bag X6001, Potchefstroom 2520, South Africa.
ACS omega
|February 19, 2024
概括
煤和塑料通过缓慢热解的共溶解产生了可预测的炭和可凝结产品. 这项研究提供了优化废弃塑料和煤炭转化为有价值产品的统计模型.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 关于煤炭和塑料混合物的缓慢复合解的研究有限.
- 了解复合溶解产品的产量和特性对于废物回收利用至关重要.
研究的目的:
- 调查南非煤炭细与低密度聚乙烯 (LDPE) 和聚烯 (PP) 的缓慢解.
- 从煤塑料挤出物中特征化热解产品 (煤炭,可凝结产品,水,气体).
- 开发用于热解产量和产品特征的预测模型.
主要方法:
- 制备了精细煤和塑料 (10-100%重量塑料) 的挤出物.
- 慢热解在经过修改的费舍尔测试设置中在520,720和920°C进行,加热速率在下为5°C/分钟.
- 热解产品采集并使用包括气体染色学和质谱学 (GC-MS) 在内的技术进行了表征.
主要成果:
- 精细煤炭的碳产量高达83%,而塑料产量超过90%的可凝结产品.
- 可冷凝产品的产量随着塑料度的增加而增加,并且受到缓慢的加热速度和小型反应堆体积的支持.
- 热解产量和焦炭特性遵循基于原材料组成的添加模型.
- 统计方程准确预测了煤炭产量,可凝结产品产量,固定碳,灰,硫和C/H含量.
- 来自挤出物的可凝结产品富含和,类似于塑料, PP/煤混合物的低沸点成分较少.
结论:
- 煤炭和塑料挤出物的缓慢解产生可预测的煤炭和可凝结产品的产量.
- 开发的统计模型可以准确预测热解产品的产量和特性.
- 这项研究为煤炭和废塑料的共同转化提供了宝贵的见解,增强了废弃物利用战略.
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