Enhanced hydrogen production through temperature-optimized pyrolysis of mixed plastic waste for sustainable energy recovery

IF 6.9 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2025-02-19 DOI:10.1016/j.psep.2025.106934

Daegi Kim , Seunghyun Lee , Sun-Young Woo , Ki Young Park

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引用次数: 0

Abstract

This study examines the pyrolysis of mixed plastic waste (PW) for hydrogen (H₂) and other gas production under controlled temperatures. It analyzes the effects of individual plastics like PET, HDPE, LDPE, PP, and PS on gas composition and yields. Findings reveal those higher temperatures (900–1000 ℃) significantly boost H₂ production, particularly from PET and PS, due to their distinct molecular structures. PET's oxygen-rich composition aids CO and CO₂ generation, whereas PS supports secondary reactions that enhance H₂ output. The diverse makeup of PW leads to balanced gas production, suggesting that pyrolysis is a versatile and sustainable method for managing plastic waste and recovering valuable gases, thus supporting circular economy objectives. The study also highlights the need for optimal pyrolysis conditions that balance efficiency with economic viability, considering the energy costs associated with higher temperatures. Further, the unique properties of plastics in PW, such as PET’s ability to generate CO and CO₂ and the contribution of hydrocarbon-rich plastics like PP and PE to CH₄ and H₂ production, are detailed. PS is noted for producing the highest H₂ yields due to its aromatic structure, which promotes efficient secondary reactions. Future research should focus on catalytic enhancements and scalability for industrial application.

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.