用响应表面方法优化Ti-BA,有效地用于废PET的催化醇化,使用响应表面方法
Ruiyang Wen1, Guoliang Shen1, Yang Yu1
1School of Petrochemical Engineering, Shenyang University of Technology Liaoyang 111003 China shengl_shxy@sut.edu.cn.
RSC advances
|June 12, 2023
概括
一种新型的基酸盐 (Ti-BA) 催化剂有效地将聚乙烯二甲 (PET) 脱聚合成二甲二基乙烯二甲 (BHET). 优化条件产生了90.01%的BHET,为塑料废物提供了可持续的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 聚合物化学 聚合物化学
背景情况:
- 聚乙烯二甲 (PET) 是一种广泛使用的塑料,面临着重大回收挑战.
- 开发有效的PET脱聚合催化剂对于可持续的废物管理至关重要.
- 转化为PET的化学回收提供了一个有前途的途径.
研究的目的:
- 为了合成和描述一种新型的基酸 (Ti-BA) 催化剂.
- 通过酒精溶解来研究Ti-BA在PET脱聚合过程中的催化性能.
- 优化反应条件,以最大限度地提高比斯2-基乙烯甲酸 (BHET) 的产量.
主要方法:
- 具有有序八面结构的Ti-BA催化剂的热水合成.
- 用于优化酒解反应参数的响应表面方法.
- 使用乙烯基醇 (EG) 作为溶剂和BHET作为目标产品的PET的催化去聚合.
主要成果:
- 确定PET醇溶的最佳条件是EG/PET质量比为3.59,温度为217°C,反应时间为3.3小时.
- 在最佳条件下,Ti-BA催化剂负荷为2% (以PET质量计算),BHET产率为90.01%.
- 催化剂表现出良好的稳定性,在相同条件下BHET产量达到80.1%.
结论:
- 合成的Ti-BA催化剂对于PET的催化醇化非常有效.
- 该研究阐明了反应机制,涉及Ti-BA活性乙烯基醇去化用于聚合物降解.
- 这项研究为聚合物废弃物降解和其他转化反应提供了宝贵的参考.
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