Journal ArticleDOI
Decomposition Characteristics of Residue from the Pyrolysis of Polystyrene Waste in a Fluidized-Bed Reactor
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TLDR
In this paper, Nitrogen and silica sand were used as a fluidizing gas and a bed material, respectively, for pyrolysis of polystyrene wastes and the effects of catalyst, temperature and gas velocity on the characteristics of decomposition of residue were examined.Abstract:
Effective treatment of residue generated from the pyrolysis of polystyrene wastes has been one of the important factors in the recovery of styrene monomer and oil from polystyrene wastes. Depending on the experimental conditions, the yields of oil and styrene monomer are considerably decreased in the presence of residue. Here the residue was decomposed effectively in a catalytic fluidized-bed reactor. Nitrogen and silica sand were used as a fluidizing gas and a bed material, respectively. Effects of catalyst, temperature and gas velocity on the characteristics of decomposition of the residue were examined. It was found that the residue could be decomposed to oil or chemicals effectively by means of a catalytic fluidized-bed reacting system. The yields of oil and individual chemicals and the composition of the products were dependent upon the operating variables such as reaction temperature, catalyst and gas velocity.read more
Citations
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Effect of zeolite catalysts on pyrolysis liquid oil
Mohammad Rehan,R. Miandad,M.A. Barakat,Iqbal Mohammad Ismail,Talal Almeelbi,Jabbar Gardy,Ali Hassanpour,Mohammad Zain Khan,Ayhan Demirbas,Abdul-Sattar Nizami +9 more
TL;DR: In this article, the quality and applications of liquid oil produced by thermal and catalytic pyrolysis of polystyrene (PS) plastic waste by using a small pilot scale PPP was determined.
Journal ArticleDOI
Microwave–metal interaction pyrolysis of polystyrene
TL;DR: In this article, a novel method for the pyrolysis of waste polystyrene was investigated which was based on high temperature by microwave-metal interaction, which may also catalyze the process and affect the nature of products.
Journal ArticleDOI
Pyrolysis of Polystyrene Waste: A Review.
TL;DR: In this paper, the pyrolysis technique for polystyrene and the important process parameters that control the end product, like oil, gas, and char are discussed, and various outlooks to optimize the liquid oil recovery from poly styrene are also reviewed.
Journal ArticleDOI
Thermal degradation of rice-bran with high density polyethylene: A kinetic study
TL;DR: In this paper, the authors investigated the thermal degradation behavior of mixtures of rice bran and high density polyethylene (HDPE) under dynamic conditions in nitrogen atmosphere and was compared with that of individual materials.
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Hydroisomerization in liquid phase of a refinery naphtha stream over Pt–Ni/H-beta zeolite catalysts
TL;DR: In this paper, the acidity of bifunctional catalysts with Pt and/or Ni, supported on beta zeolite, was investigated in the liquid phase of a C7-C8 stream obtained by distillation of a refinery naphtha stream.
References
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Journal ArticleDOI
Pyrolysis of polystyrene waste in a fluidized-bed reactor to obtain styrene monomer and gasoline fraction
TL;DR: In this paper, a specially designed laboratory fluidized-bed reactor was developed for the pyrolysis of polystyrene (PS) waste in the range 450-700°C with nitrogen as the carrier gas and 20-40 mesh quartz sand as the fluidization medium, operating isothermally at atmospheric pressure.
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Chemical recycling of waste polystyrene into styrene over solid acids and bases
Zhibo Zhang,Tamaki Hirose,Suehiro Nishio,Yoshio Morioka,Naoto Azuma,Akifumi Ueno,Hironobu Ohkita,Mitsunori Okada +7 more
TL;DR: In this article, the authors studied the catalytic degradation of waste polystyrene into styrene using solid acids and bases as catalysts, and showed that solid bases are effective catalysts for the chemical recycling of styrene.
Journal ArticleDOI
Cracking catalysts used as fluidized bed material in the Hamburg pyrolysis process
TL;DR: In this article, the effects of fluid catalytic cracking (FCC) catalysts as fluidized bed material on the pyrolysis of polystyrene and polyethylene were investigated at temperatures between 370 and 515°C in a scale of ∼1 kgh −1.
Journal ArticleDOI
Chemical Recycling of Polymer Materials
Frank Sasse,Gerhard Emig +1 more
TL;DR: In this article, the authors compare a fluidized-bed reactor and a tubular reactor on the basis of reactor modelling evaluations, and present relevant parameters for reactor design and scale-up.
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Chemical recycling of mixture of waste plastics using a new reactor system with stirred heat medium particles in steam atmosphere
Takao Masuda,Kushino Tatsuhiko,Toshihiro Matsuda,Shin R. Mukai,Kenji Hashimoto,Shuichi Yoshida +5 more
TL;DR: In this paper, the degradation mechanisms of eight kinds of polyesters, two polyolefins (polyethylene and polypropylene), two polyamide resins (nylon-6 and nylon-6,6), polystyrene and three polyesters (polycarbonate, poly(butylene terephthalate) and poly(ethylene terethus), were investigated both in nitrogen and steam as the carrier gas, leaving negligibly small amount of carbonaceous residue.