Neutral Hydrolysis of Post-Consumer Polyethylene Terephthalate Waste in Different Phases

Patrícia Pereira; Phillip E. Savage; Christian W. Pester

doi:10.1021/acssuschemeng.3c00946

Neutral Hydrolysis of Post-Consumer Polyethylene Terephthalate Waste in Different Phases

Patrícia Pereira, Phillip E. Savage, Christian W. Pester

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	7203-7209
Number of pages	7
Journal	ACS Sustainable Chemistry and Engineering
Volume	11
Issue number	18
DOIs	https://doi.org/10.1021/acssuschemeng.3c00946
State	Published - May 8 2023

All Science Journal Classification (ASJC) codes

General Chemistry
Environmental Chemistry
General Chemical Engineering
Renewable Energy, Sustainability and the Environment

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acssuschemeng.3c00946

Cite this

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title = "Neutral Hydrolysis of Post-Consumer Polyethylene Terephthalate Waste in Different Phases",

abstract = "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.",

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Neutral Hydrolysis of Post-Consumer Polyethylene Terephthalate Waste in Different Phases

Abstract

All Science Journal Classification (ASJC) codes

UN SDGs

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