Thermal degradation of waste plastics in a two-stage pyrolysis-catalysis reactor over core-shell type catalyst

Wu, Shan-Luo; Kuo, Jia‐Hong; Wey, Ming‐Yen

doi:10.1016/j.jaap.2019.104641

Cited by 37 publications

(13 citation statements)

References 43 publications

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“…First of all, most of the disposable face masks used in highly contaminated areas such as medical centers, public transportations, and public places could have high risks of contaminations with coronavirus. In addition, the heterogeneous nature of PPE makes it difficult to establish a reliable recycle platform [13] . Indeed, PPE is manufactured from various polymers (polystyrene, polypropylene, polyethylene, polyvinyl chloride, polyethylene terephthalate, etc .)…”

Section: Introductionmentioning

confidence: 99%

Valorization of disposable COVID-19 mask through the thermo-chemical process

Jung

Lee

Dou

et al. 2021

Chemical Engineering Journal

218

138

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Section: Introductionmentioning

confidence: 99%

Valorization of disposable COVID-19 mask through the thermo-chemical process

Jung

Lee

Dou

et al. 2021

Chemical Engineering Journal

218

138

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“…Unfortunately, a consistent PPE waste management policy has not been achieved due to the high bio-hazardous potential of the waste (Bdour et al 2007 ). In addition, the heterogeneous composition of PPE waste makes it challenging for proper separation and recycling (Wu et al 2019 ) (Anuar Sharuddin et al 2016 ). Furthermore, recycling only delays final disposal and the plastics obtained have limited economic and technological characteristics.…”

Section: Introductionmentioning

confidence: 99%

Current plastics pollution threats due to COVID-19 and its possible mitigation techniques: a waste-to-energy conversion via Pyrolysis

2021

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Background The extensive use and production of PPE, and disposal in the COVID-19 pandemic increases the plastic wastes arise environmental threats. Roughly, 129 billion face masks and 65 billion plastic gloves every month are used and disposed of on the globe. The study aims to identify the polymer type of face masks and gloves and sustainable plastic waste management options. Results The identification of polymers, which can help for fuel conversion alternatives, was confirmed by FTIR and TGA/DTA analysis and confirms that the polymeric categories fit for the intended purpose. Moreover, the handling technique for upcycling and the environmental impacts of the medical face mask and glove were discussed. The FTIR result revealed that face masks and gloves are polypropylene and PVC thermoplastic polymer, respectively and they can be easily transformed to fuel energy via pyrolysis. The endothermic peaks around 431 ℃ for medical glove and 175 ℃ for surgical is observed tells that the melting point of the PVC and polypropylene of plastic polymers, respectively. The pyrolysis of the face mask and glove was carried out in a closed reactor at 400 ℃ for 1 h. Conferring to lab-scale processes, liquid, and wax fuel rate of 75%, char of 10%, and the rest non-condensable gases were estimated at the end. Conclusions It can be concluded that the medical plastics can be recycled into oil due to their thermoplastics nature having high oil content and the waste to energy conversion can potentially reduce the volume of PPE plastic wastes.

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“…Many studies focus on the design of the catalyst such that the appropriate porous arrangements are chosen to enhance selectivity and conversion. [124,[218][219][220] This is because, as with hierarchical catalysts, synthesis conditions can severely affect the crystallinity of the core-shell materials.…”

Section: Hierarchical and Core-shell Catalystsmentioning

confidence: 99%

“…By coating microporous zeolites with mesoporous silica‐alumina, the advantageous properties of both types of catalysts can be meshed into one material. Many studies focus on the design of the catalyst such that the appropriate porous arrangements are chosen to enhance selectivity and conversion [124,218–220] . This is because, as with hierarchical catalysts, synthesis conditions can severely affect the crystallinity of the core‐shell materials.…”

Section: Heterogeneous Catalystsmentioning

confidence: 99%

The Use of Heterogeneous Catalysis in the Chemical Valorization of Plastic Waste

2020

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, respectively. Her graduate research focused on the fundamental understanding of deoxygenation mechanisms for biomass probe molecules on single crystals and thin films. During her graduate career, she received the DOE Science Graduate Student Research (SCGSR) award (2019) and conducted surface science research at Brookhaven National Lab. She now is a postdoctoral researcher at the University of Wisconsin-Madison. Her research focuses on surface spectroscopy and controlled design of heterogeneous catalysts. Melissa C. Cendejas received her B.A. (2016) in Chemistry and English from Williams College. There, she worked on the synthesis of conjugated organic molecules and phosphorusbased surfactants. She then started her PhD in Chemistry at the University of Wisconsin-Madison under the supervision of Prof. Ive Hermans. She studies active site formation on boron-based catalysts. She received the DOE Office of Science Graduate Student Research (SCGSR) award (2020) to perfrom in situ x-ray spectroscopy of catalysts at Stanford Synchrotron Radiation Lightsourse. Prof. Dr. Ive Hermans obtained his Ph.D. from KU Leuven University in Belgium in 2006. In addition to his scientific education, he also holds a postgraduate degree in Business Administration (KU Leuven, 2006). After postdoctoral research on in situ spectroscopy and reaction engineering with Prof. Alfons Baiker, he became assistant professor for heterogeneous catalysis (spring 2008) at ETH Zurich in Switzerland. January 2014, Prof. Hermans moved to the University of Wisconsin-Madison, holding a dual appointment in the Department of Chemistry and the Department of Chemical and Biological Engineering. His group focuses on the mechanistic understanding of catalytic technology using a variety of techniques.

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Thermal degradation of waste plastics in a two-stage pyrolysis-catalysis reactor over core-shell type catalyst

Cited by 37 publications

References 43 publications

Valorization of disposable COVID-19 mask through the thermo-chemical process

Valorization of disposable COVID-19 mask through the thermo-chemical process

Current plastics pollution threats due to COVID-19 and its possible mitigation techniques: a waste-to-energy conversion via Pyrolysis

The Use of Heterogeneous Catalysis in the Chemical Valorization of Plastic Waste

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