煤支持的催化剂,有效地将废塑料转化为和碳纳米管
Yili Zhang1, Wenjing Ma2, Zhaotianyi Zhang1
1MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, Shanxi, 710049, China.
Journal of environmental management
|December 8, 2024
概括
这项研究开发了一种低成本的催化剂,用于塑料热解,有效地从废聚乙烯中生产和高质量的碳纳米管 (CNT). 催化剂在多个循环中表现出极好的可回收性和稳定性.
科学领域:
- 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.
- 环境科学 环境科学
背景情况:
- 热解催化为废塑料的转化提供了一个经济和环境的途径.
- 开发具有成本效益的催化剂对于大规模塑料价值化至关重要.
研究的目的:
- 为了合成和表征一种以为基础的催化剂,支持聚乙烯 (PE) 热解的煤 (CG).
- 研究催化剂组成和反应温度对和碳纳米管 (CNT) 生产的影响.
- 评估催化剂的可回收性和产生的CNTs的质量.
主要方法:
- 催化剂制备的浸方法 (Ni/CG).
- 两个阶段的固定床反应堆用于塑料热解和催化激活.
- 多种类型的催化温度 (700-900°C) 和Ni负荷 (5-20%).
- 用于催化剂再生的气相氧化.
主要成果:
- 使用15%的Ni/CG催化剂在750°C时达到最佳性能.
- 的最大产量为: 31.48 mmol/g (66.48 卷%).
- 最大CNT产量:79.71毫克/克与高石墨化 (ID/IG=0.72).
- 通过氧化催化剂再生保持高活性,并在5个循环后产生高质量的CNT (ID/IG = 0.67).
结论:
- /CG催化剂有效地将废弃的PE转化为有价值的和CNT.
- 催化剂表现出极好的稳定性和可回收性.
- 该方法为塑料废物管理和有价值材料生产提供了一种可持续的方法.
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