关于废弃热绝缘管道材料的资源和高效回收技术的研究
Xiaohua Gu1,2,3, Qinglong Zhao4, Shangwen Zhu1
1School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, China.
ACS omega
|April 14, 2025
概括
这项研究引入了一种新的化学回收方法,用于废物聚酸盐 (PIR) 绝缘,使用酒精化系统. 该过程有效降解PIR,使材料可重复使用,用于节能绝缘应用.
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:
- 废物聚氨酸盐 (PIR) 绝缘材料由于其高交联度和耐火性质而带来了环境挑战.
- 目前用于PIR绝缘的回收方法有限,需要创新的方法来实现可持续的废物管理.
研究的目的:
- 开发和评估废弃化学管道绝缘和冷却材料的化学降解和回收方法.
- 为节能应用研究再利用退化PIR绝缘材料的可行性.
主要方法:
- 采用了两组分醇化系统,使用乙烯糖醇 (DEG) 和1,4-丁乙烯糖醇 (1,4-BG) 与金属催化剂.
- 优化了1,4-BG/DEG比率和反应温度 (180-190°C) 以实现有效的PIR降解.
主要成果:
- 在180-190°C下1小时内,1,4-BG/DEG比率为43:57的最佳降解得到了实现.
- 再生绝缘材料的表面密度低 (0.041 g/cm3),压力强度高 (0.413 MPa),热稳定性优异.
- 回收材料的冷损耗满足了能源效率要求,低于23W/m2的设计值.
结论:
- 拟议的化学降解和回收战略为聚氨废物提供了一种开创性的绿色处理方法.
- 这种方法有效地回收PIR绝缘,产生适合节能应用的材料.
- 该方法解决了回收高度交联,耐火聚氨废物的挑战.
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