Thermal decomposition of individual and mixed plastics in the presence of CaO or Ca(OH)2

Kumagai, Shogo; Hasegawa, Itaru; Grause, Guido; Kameda, Tomohito

doi:10.1016/j.jaap.2015.04.004

Cited by 69 publications

(24 citation statements)

References 27 publications

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“…The C, H, and O composition of the sample was 61.87 wt %, 4.35 wt %, and 33.78 wt %, respectively, which is similar to the theoretical values for pure PET (C, 62.5 wt %; H, 4.2 wt %; O, 33.3 wt %). Proximate analysis was also carried out under reported condition [11] and was listed in Table 1. The contents of volatiles, fixed carbon, and ash of PET were 88.54%, 9.37%, and 2.09%, respectively, suggesting the formation of large amounts of oil or gas products during pyrolysis.…”

Section: Methodsmentioning

confidence: 99%

Catalytic Fast Pyrolysis of Poly (Ethylene Terephthalate) (PET) with Zeolite and Nickel Chloride

et al. 2020

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The pyrolysis of poly (ethylene terephthalate) (PET) in the presence of ZSM-5 zeolite and NiCl2 as a catalyst was studied at different temperatures under N2 atmosphere. Quantitative 13C nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FT-IR) were applied to characterize the waxy and solid residue. The carboxyl and aliphatic hydroxyl groups in the waxy residue have been greatly depleted after the use of zeolite during pyrolysis on the basis of the results of 13C NMR and FT-IR analysis. The proportion of aromatic hydroxyl groups increased by 21.82% when the mass ratio of zeolite to PET was set to 2.0/1.0. The results indicate that ZSM-5 is able to facilitate the decomposition of carboxyl, aliphatic groups, and ether bonds in the primary products produced from the pyrolysis of PET. In addition, the deoxygenation effects on the waxy products have been significantly enhanced with the addition of zeolite based on the results of NMR.

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Section: Methodsmentioning

confidence: 99%

Catalytic Fast Pyrolysis of Poly (Ethylene Terephthalate) (PET) with Zeolite and Nickel Chloride

et al. 2020

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“…It should be noted that some CO2 might be produced during the experiment since the samples were collected as waste polymer pellets, however the amounts were very low and were neglected. 18 in their study on the thermal decomposition of individual and mixed plastics in an electrically heated vertical tube reactor, also found that PS was mainly decomposed into liquid at 600 °C. They also concluded that the main component of the decomposition was styrene, principally responsible for the nC9 fraction.…”

Section: Co2 + H2 = Co + H2o (Reaction 1)mentioning

confidence: 96%

Pyrolysis-Catalytic-Dry Reforming of Waste Plastics and Mixed Waste Plastics for Syngas Production

Saad

Williams

2016

Energy Fuels

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Abstract:The CO2 dry reforming of various types of waste plastics (LDPE, HDPE, PS, PET and PP) and a simulated mixture of the different waste plastic was investigated over a Ni-Co-Al catalyst using a two-stage reactor. The first stage pyrolysed the plastics and the second stage involved catalytic dry reforming of the product pyrolysis gases with CO2. The introduction of CO2 without catalyst markedly increased the dry reforming reaction and significantly improved the production of H2/CO synthesis gas (syngas). The introduction of the Ni-Co-Al catalyst further significantly improved the production of syngas. LDPE produced the highest yield of syngas at 154.7 mmolsyngas g -1 plastic from the pyrolysis-catalytic dry reforming process. The order of syngas production for the different plastics was, LDPE

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“…Lower acidic catalysts are also of interest for PSW conversion. [135,[230][231][232][233] Basic metal oxides such as MgO and CaO have shown reduced activation energies and enhanced selectivity towards phenolic production within the liquid product for polycarbonate (PC) degradation. [135] MgO has also been investigated for LDPE conversion and was found to favor the production of higher carbon number hydrocarbons within the gas fraction, as well as enhance the conversion of alkenes to mono-aromatics and the hydrogenation of alkenes to alkanes within the liquid fraction to yield diesel-range oil.…”

Section: Metal Oxidesmentioning

confidence: 99%

“…Lower acidic catalysts are also of interest for PSW conversion [135,230–233] . Basic metal oxides such as MgO and CaO have shown reduced activation energies and enhanced selectivity towards phenolic production within the liquid product for polycarbonate (PC) degradation [135] .…”

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 decomposition of individual and mixed plastics in the presence of CaO or Ca(OH)2

Cited by 69 publications

References 27 publications

Catalytic Fast Pyrolysis of Poly (Ethylene Terephthalate) (PET) with Zeolite and Nickel Chloride

Catalytic Fast Pyrolysis of Poly (Ethylene Terephthalate) (PET) with Zeolite and Nickel Chloride

Pyrolysis-Catalytic-Dry Reforming of Waste Plastics and Mixed Waste Plastics for Syngas Production

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

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