Neutral Hydrolysis of Post-Consumer Polyethylene Terephthalate Waste in Different Phases,ACS Sustainable Chemistry & Engineering

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Neutral Hydrolysis of Post-Consumer Polyethylene Terephthalate Waste in Different Phases
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-04-26 , DOI: 10.1021/acssuschemeng.3c00946
Patrícia Pereira ₁ , Phillip E. Savage ₁ , Christian W. Pester _{1,

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Affiliation

Post-consumer polyethylene terephthalate (PET) was hydrolyzed in pure water over a wide range of temperatures (190–400 °C) and pressures (1–35 MPa) to produce terephthalic acid (TPA). Solid or molten PET was subjected to water as a saturated vapor, superheated vapor, saturated liquid, compressed liquid, and supercritical fluid. The highest TPA yields were observed for the hydrolysis of molten PET in saturated liquid water. Isothermal and non-isothermal hydrolysis of PET was also explored. Rapidly heating the reactor contents at about 5–10 °C/s (“fast” hydrolysis) led to high TPA yields, as did isothermal PET hydrolysis, but within 1 min instead of 30 min. Notably, these conditions resulted in the lowest environmental energy impact metric observed to date for uncatalyzed hydrolysis.

中文翻译：

不同阶段消费后聚对苯二甲酸乙二醇酯废物的中性水解

消费后聚对苯二甲酸乙二醇酯 (PET) 在纯水中在很宽的温度范围 (190–400 °C) 和压力 (1–35 MPa) 下水解，生成对苯二甲酸 (TPA)。固体或熔融的 PET 以饱和蒸汽、过热蒸汽、饱和液体、压缩液体和超临界流体的形式接触水。在饱和液态水中熔融 PET 的水解观察到最高的 TPA 产率。还探索了 PET 的等温和非等温水解。以大约 5–10 °C/s（“快速”水解）快速加热反应器内容物可导致高 TPA 产率，等温 PET 水解也是如此，但在 1 分钟内而不是 30 分钟内。值得注意的是，这些条件导致迄今为止观察到的未催化水解的最低环境能量影响指标。

更新日期：2023-04-26

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