Petrochemical feedstock from pyrolysis of waste polyethylene and polypropylene using different catalysts

Santos, Bianca Pedroso Silva; Almeida, Débora; Marques, Maria de Fátima Vieira; Henriques, Cristiane A.

doi:10.1016/j.fuel.2017.11.104

Cited by 79 publications

(38 citation statements)

References 35 publications

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“…Santos et al looked at the effect of acid leaching and alkaline treating HZSM-5 on the pyrolysis of a PE/PP mixture. [108] It was found that alkaline treatment of the catalyst decreases both the surface and bulk Si/Al ratio and results in increased liquid fractions, with almost no char detected (Table 3).…”

Section: Zsm-5mentioning

confidence: 98%

“…These zeolites are MFI (silicalite-1) structured porous aluminosilicate zeolites that have been reported to have increased cracking activity for polyolefins -in particular PE -resulting in a decrease in the heavy oil fraction, reduction in wax production, minimization in char production, and an increase in light hydrocarbon content in the liquid and gas produced. [76,80,105,108,111,147,152,[165][166][167] These desirable results are attributed to the smaller pores in combination with strongly acidic sites which allow for initially cracked fragments to diffuse through the channels and further react within the cavities to produce higher value products. [95,99,103,105,126,147,152,165,168,169] ZSM-5 catalysts generally produce higher yields of light alkene and aromatic compounds.…”

Section: Zsm-5mentioning

confidence: 99%

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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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Section: Zsm-5mentioning

confidence: 98%

Section: Zsm-5mentioning

confidence: 99%

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

2020

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“…In this work, the yield of the liquid fraction decreased with the addition of the catalyst, and the liquid fraction had properties suitable for use as fuel, although the amount of aromatic compounds present increased. Santos et al [20] investigated the catalytic pyrolysis of polyethylene (PE) and polypropylene (PP) plastic waste with catalysts such as HZSM-5, USY, NH 4 ZSM5. The use of zeolite USY resulted in a higher amount of liquid fraction, whose main components were alkylbenzenes, naphthalenes and olefins.…”

Section: Introductionmentioning

confidence: 99%

Performance of Different Catalysts for the In Situ Cracking of the Oil-Waxes Obtained by the Pyrolysis of Polyethylene Film Waste

et al. 2020

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Currently, society is facing a great environmental problem, due to the large amount of plastic waste generated, most of which is not subjected to any type of treatment. In this work, polyethylene film waste from the non-selectively collected fraction was catalytically pyrolyzed at 500 °C, 20 °C/min for 2 h, in a discontinuous reactor using nitrogen as an inert gas stream. The main objective of this paper is to find catalysts that decrease the viscosity of the liquid fraction, since this property is quite meaningful in thermal pyrolysis. For this purpose, the three products of catalytic pyrolysis, the gaseous fraction, the solid fraction and the liquid fraction, were separated, obtaining the yield values. After that, the aspect of the liquid fraction was studied, differentiating which catalysts produced a larger quantity of waxy fraction and which ones did not. The viscosity of these samples was measured in order to confirm the catalysts that helped to obtain a less waxy fraction. The results showed that the zeolites Y and the zeolites β used in this study favor the obtaining of a compound with a smaller amount of waxes than for example catalysts such as FCC, ZSM-5 or SnCl2.

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“…A smart approach to the recycling of post-consumer PP items envisages both to transform them into new consumer items and to protect the environment. As recycling methods for PP, the following are known-primary recycling, mechanical (secondary recycling), chemical and pyrolysis methods [17][18][19]. Among these methods, the secondary recycling is preferable for reducing the amount of plastic waste, both from economic and ecological perspectives.…”

Section: Introductionmentioning

confidence: 99%

Effect of Styrene-Diene Block Copolymers and Glass Bubbles on the Post-Consumer Recycled Polypropylene Properties

et al. 2020

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The recycled polypropylene (rPP) materials that meet technical requirements such as reducing the dimensions and improving the tensile, elongation, impact strength, thermal stability, as well as melt processing, are required for the manufacturing industry. In this paper, we studied the mechanical and thermal properties of post-consumer rPP by adding both synthesized thermoplastic elastomers, and glass bubbles (GB) by a melt allowing process. Styrene-butadiene (SBS) and styrene-isoprene (SIS) block-copolymers that had a styrene content of 30 wt% were synthesized by anionic sequential polymerization. The obtained post-consumer rPP composites were characterized by optical microscopy, scanning electron microscopy (SEM), mechanical analyses (tensile, density, hardness, VICAT softening temperature (VST), heat deflection temperature (HDT), dynamic mechanical analysis (DMA), IZOD strength) and thermal analyses (differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA)). Weight reduction and improvement of the tensile, elongation, impact strength, thermal stability, as well as melt processing of post-consumer recycled polypropylene (rPP) properties compounded with thermoplastic elastomers and glass bubbles, sustain the use of these formulations for engineering applications.

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Petrochemical feedstock from pyrolysis of waste polyethylene and polypropylene using different catalysts

Cited by 79 publications

References 35 publications

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

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

Performance of Different Catalysts for the In Situ Cracking of the Oil-Waxes Obtained by the Pyrolysis of Polyethylene Film Waste

Effect of Styrene-Diene Block Copolymers and Glass Bubbles on the Post-Consumer Recycled Polypropylene Properties

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