Investigation into the Catalytic Activity of Microporous and Mesoporous Catalysts in the Pyrolysis of Waste Polyethylene and Polypropylene Mixture

Li, Kaixin; Lee, Shao Wee; Yuan, Guang; Lei, Junxi; Lin, Sihan; Weerachanchai, Piyarat; Yang, Yanhui; Wang, Jing‐Yuan

doi:10.3390/en9060431

Cited by 49 publications

(42 citation statements)

References 38 publications

(53 reference statements)

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“…However, the derivative thermogravimetric analysis (DTG) curves have two partially overlapped peaks (Figure 3b), which indicate an interaction between LDPE and PP. This complies with results reported by Kaixin et al [22].…”

Section: Thermal and Catalytic Degradation Of Polymers And Their Mixtsupporting

confidence: 94%

“…The second step is catalytic pyrolysis, where the catalyst cracks the liquid products further to lower hydrocarbon products, leading to a lower liquid yield. The role of the catalyst in this work is consistent with other reports [14,22].…”

Section: Pyrolysis Yieldssupporting

confidence: 93%

“…This might be explained by the uneven distribution of heat in the furnace. The presence of PP in the mixture initiates the cracking of LDPE in the mixture at a lower temperature, leading to low liquid production, which corresponds to other reports [22,25,26]. However, an unusual behaviour was observed in the mixture with a higher PP portion, where a higher liquid yield was observed.…”

Section: Pyrolysis Yieldssupporting

confidence: 76%

“…The mechanism of degradation of LDPE and PP is a radical chain mechanism; the tertiary radical which is present in the polymeric chain of PP, initiated by random chain scission captures the hydrogen from LDPE, thereby enhancing the degradation of LDPE at a lower temperature and amplifying the degradation of the LDPE/PP mixture [22]. It is important to note that no residue was left at the end of the experiments.…”

Section: Thermal and Catalytic Degradation Of Polymers And Their Mixtmentioning

confidence: 99%

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Experimental Study of Thermal and Catalytic Pyrolysis of Plastic Waste Components

et al. 2018

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Thermal and catalytic pyrolysis of virgin low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene (PP) and mixtures of LDPE/PP were carried out in a 200 mL laboratory scale batch reactor at 460 °C in a nitrogen atmosphere. Thermogravimetric analysis (TGA) was carried out to study the thermal and catalytic degradation of the polymers at a heating rate of 10 °C/min. The amount of PP was varied in the LDPE/PP mixture to explore its effect on the reaction. In thermal degradation (TGA) of LDPE/PP blends, a lower decomposition temperature was observed for LDPE/PP mixtures compared to pure LDPE, indicating interaction between the two polymer types. In the presence of a catalyst (CAT-2), the degradation temperatures for the pure polymers were reduced. The TGA results were validated in a batch reactor using PP and LDPE, respectively. The result from thermal pyrolysis showed that the oil product contained significant amounts of hydrocarbons in the ranges of C7–C12 (gasoline range) and C13–C20 (diesel range). The catalyst enhanced cracking at lower temperatures and narrowed the hydrocarbon distribution in the oil towards the lower molecular weight range (C7–C12). The result suggests that the oil produced from catalytic pyrolysis of waste plastics has a potential as an alternative fuel.

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Section: Thermal and Catalytic Degradation Of Polymers And Their Mixtsupporting

confidence: 94%

Section: Pyrolysis Yieldssupporting

confidence: 93%

Section: Pyrolysis Yieldssupporting

confidence: 76%

Section: Thermal and Catalytic Degradation Of Polymers And Their Mixtmentioning

confidence: 99%

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Experimental Study of Thermal and Catalytic Pyrolysis of Plastic Waste Components

et al. 2018

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“…Similarly, survey of interaction among the other factors indicated that there is not a significant interaction [151]. The effects of catalysts on the catalytic degradation of polymer have also been investigated by contacting melted polymers with catalyst in fixed bed reactors [152,153], heating mixtures of polymer, and catalyst powders in reaction vessels [154,155], and passing the products of polymer pyrolysis through fixed bed reactors containing cracking catalysts [156].…”

Section: Methods Of Catalytic Degradationmentioning

confidence: 99%

Polyolefins and the environment

et al. 2017

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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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Investigation into the Catalytic Activity of Microporous and Mesoporous Catalysts in the Pyrolysis of Waste Polyethylene and Polypropylene Mixture

Cited by 49 publications

References 38 publications

Experimental Study of Thermal and Catalytic Pyrolysis of Plastic Waste Components

Experimental Study of Thermal and Catalytic Pyrolysis of Plastic Waste Components

Polyolefins and the environment

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

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