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Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Detection Methods Sign in to save

Online TG-FTIR-MS analysis of the catalytic pyrolysis of polyethylene and polyvinyl chloride microplastics

Journal of Hazardous Materials 2022 76 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 55 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Wei Wei, Zhijie Chen, Zhijie Chen, Wei Wei, Bing‐Jie Ni Wei Wei, Wei Wei, Zhijie Chen, Zhijie Chen, Wei Wei, Wei Wei, Xiaoqing Liu, Wei Wei, Zhijie Chen, Wei Wei, Wei Wei, Bing‐Jie Ni Zhijie Chen, Wei Wei, Wei Wei, Wei Wei, Zhijie Chen, Wei Wei, Bing‐Jie Ni Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Zhijie Chen, Zhijie Chen, Wei Wei, Zhijie Chen, Wei Wei, Wei Wei, Ke Tian, Xiaoqing Liu, Zhijie Chen, Wei Wei, Bing‐Jie Ni Wei Wei, Wei Wei, Zhijie Chen, Wei Wei, Wei Wei, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Xiaoqing Liu, Xiaoqing Liu, Xiaoqing Liu, Wei Wei, Zhijie Chen, Wei Wei, Wei Wei, Zhijie Chen, Zhijie Chen, Zhijie Chen, Zhijie Chen, Wei Wei, Bing‐Jie Ni Wei Wei, Wei Wei, Wei Wei, Bentuo Xu, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Zhijie Chen, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Bentuo Xu, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Zhijie Chen, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Zhijie Chen, Bing‐Jie Ni Bing‐Jie Ni Zhijie Chen, Wei Wei, Bing‐Jie Ni

Summary

Researchers used online thermogravimetry-FTIR-mass spectrometry to track the catalytic pyrolysis of polyethylene and polyvinyl chloride microplastics with an iron-aluminum oxide catalyst. The study found that the catalyst promoted conversion of plastic waste into useful carbon products and aromatic compounds while significantly reducing harmful chlorine-containing byproducts from PVC pyrolysis.

Polymers
PE PVC

Microplastics (MPs) are frequently detected in urban waters, which would pose a threat to human health through the food chain. Thus, efficient approaches to the elimination of MPs are urgently required. Pyrolysis is a powerful technique for the potential treatment of MPs. The online thermogravimetry-Fourier transform infrared reflection-Mass spectrometry (TG-FTIR-MS) is applied for tracking the pyrolysis process of representative polyethylene (PE) and polyvinyl chloride (PVC) MPs in urban waters, together with or without the FeAlO catalyst. TG could quantitatively determine the decomposition behavior and kinetics of MPs while FTIR and MS spectra would be capable of characterizing the pyrolysis products. The results revealed that FeAlO is an excellent carbon support, and the deposited carbon can be gasified to CO at higher pyrolysis temperatures. Moreover, more aromatic compounds were generated from the pyrolysis of PE MPs with the catalyzation of FeAlO. Large quantities of benzene were also produced in the PVC MPs pyrolysis with or without FeAlO. Also, FeAlO largely decreased the concentrations of chlorine-containing compounds in the liquid products of PVC MPs pyrolysis. This study provides a efficient technique for the online observation of the MPs' catalytic pyrolysis process, which would guide future upcycling of MPs into value-added products.

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