Comparision of real waste (MSW and MPW) pyrolysis in batch reactor over different catalysts. Part I: Product yields, gas and pyrolysis oil properties

Ateş, Funda; Miskolczi, Norbert; Borsodi, N.

doi:10.1016/j.biortech.2013.01.112

Cited by 166 publications

(65 citation statements)

References 23 publications

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“…Figure 8 shows gas chromatograms for the pyrolysis oil derived from HIPS in the absence of a catalyst and also the product oil from the pyrolysis catalysis of HIPS with the Y zeolite and the ZSM- catalytic activity [17,18]. The active catalytic sites producing increased conversion to aromatic products [19]. Zeolites are known as solid acid catalysts because they can have strongly acidic protons uniformly distributed throughout the internal volume of the catalyst channels.…”

Section: Product Analysismentioning

confidence: 99%

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Catalytic pyrolysis of waste plastic from electrical and electronic equipment

Muhammad

Onwudili

Williams

2015

Journal of Analytical and Applied Pyrolysis

106

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Plastic waste collected from waste electrical and electronic equipment (WEEE) was pyrolysed in the presence of zeolite catalysts to produce a gasoline range aromatic oil. The plastic was from equipment containing cathode ray tubes (CRTs) and also plastic waste from refrigeration equipment. In addition, for comparison the main plastics contained in the WEEE, in the form of high impact polystyrene (HIPS) and acrylonitrile-butadiene-styrene (ABS) were also pyrolysed in the presence of the zeolite catalysts. Two zeolite catalysts; Y zeolite and ZSM-5 were used. Catalytic pyrolysis took place in a two stage fixed bed, batch reactor with the plastic pyrolysed in the first stage and the evolved pyrolysis gases catalysed in the second stage reactor. The quantity of oil produced from uncatalysed pyrolysis of plastics from CRTs and refridgerators was more than 80 wt%. The gases consisted of hydrogen, methane and C 2 -C 4 hydrocarbons. When the zeolite catalysts were introduced there was a decrease of between 5-10 wt% in oil yield and a corresponding increase in gas yield.The composition of the oils derived from the uncatalysed pyrolysis of WEEE plastics were mainly aromatic with high concentrations of styrene, derived from the HIPS and ABS present in the plastic waste. Addition of the zeolite ZSM-5 and Y zeolite to the pyrolysis process resulted in significant concentrations of benzene, toluene and ethylbenzene in the product oil but reduced concentrations of styrene. The oils from both thermal and catalysed pyrolysis also contained significant concentrations of polycyclic aromatic hydrocarbons for example, naphthalene, phenanthrene and pyrene.

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Section: Product Analysismentioning

confidence: 99%

“…Ates et al [19] investigated the batch reactor catalytic pyrolysis of the plastic fraction produced from municipal solid waste using a range of different catalysts. They reported that the Si:Al ratio influenced the production of aromatic compounds in the product oil, with a zeolite ZSM-5…”

Section: Oil Compostionmentioning

confidence: 99%

Catalytic pyrolysis of waste plastic from electrical and electronic equipment

Muhammad

Onwudili

Williams

2015

Journal of Analytical and Applied Pyrolysis

106

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“…During pyrolysis the feedstocks are degraded at temperatures between 350 -1000 ¡C [15]; The temperature at which the biochar is produced has a significant effect on its physico-chemical properties [16]. The loss of mass of the starting product depends on the temperature and duration of the pyrolysis process.…”

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confidence: 99%

Characterization of biochars produced from pyrolysis of pelletized agricultural residues

Colantoni

Evic

Lord

et al. 2016

Renewable and Sustainable Energy Reviews

128

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“…Under such condition, the materials decompose into smaller fragments, which may then recombine to form some other compounds. Extensive researches have been done by researchers on pyrolysis of plastic waste [2,3] and municipal waste [4,5]. However, before plastic waste pyrolysis can be industrialized, there are many obstacles that are yet to be solved, including the modification of pyrolysis from batch process to continuous process, which is commonly been applied in any other large scale process.…”

Section: Introductionmentioning

confidence: 99%

Study on Dissolution of Low Density Polyethylene (LDPE)

Wong

Abdullah

2014

AMM

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Abstract. The world is currently facing the problem brought by plastic waste, as well as energy crisis. It is known that catalytic cracking of low density polyethylene (LDPE) waste can produce liquid fuels with similar properties to fossil fuels, hence serve as a solution to the problems mentioned. However, the problem of pipelines clogging by molten plastic feed during the cracking process has to be solved before the process can be up-scaled to continuous process. It was proposed that LDPE waste can be dissolved in suitable solvent before being catalytically cracked under suitable conditions. Previously, a study was done to investigate on dissolution of virgin LDPE (in pellet form) and waste LDPE (in film form) in different solvents [1]. This study was done to investigate the behavior of virgin LDPE (in powder form) dissolved in several chosen solvents, namely benzene, toluene, chlorobenzene, isooctane, xylene and trichloroethylene, and compare the result with previous work. From the study, it was observed that LDPE samples could dissolve in benzene and toluene to a high extent. On the other hand, isooctane acted as a weak solvent towards LDPE powder. The difference of LDPE solubility in solvents was attributed to the surface area per unit mass of LDPE samples. Despite the superior property of benzene as solvent for LDPE, the safety factor study showed that toluene, xylene and trichloroethylene were more suitable to be used in LDPE dissolution. However, care should be taken to minimize possible effects of the solvents towards the body while using the solvents mentioned. IntroductionThere are many researchers who turned their attentions to pyrolysis of plastic waste, as it provides a viable solution to plastic waste recycling. Pyrolysis is a reaction where high temperature is applied to certain materials in the absence of oxygen, usually accompanied with high pressure. Under such condition, the materials decompose into smaller fragments, which may then recombine to form some other compounds. Extensive researches have been done by researchers on pyrolysis of plastic waste [2,3] and municipal waste [4,5]. However, before plastic waste pyrolysis can be industrialized, there are many obstacles that are yet to be solved, including the modification of pyrolysis from batch process to continuous process, which is commonly been applied in any other large scale process. In most researches, plastic waste is fed into the pyrolysis reactor in solid form, and then melted to form liquid at the temperature above 300 °C. Any temperature lower than plastic's melting point causes the solution to solidify. This can happen in the cases of process shut down or maintenance, causing blockage to the process pipelines. There is possibility of liquid feed to minimize coke formation during the process, but it has not been confirmed yet particularly for pyrolysis of plastic waste.In order to overcome this problem, the dissolution/reprecipitation technique could be of great help. This technique is developed in the effort of recycling plastic...

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Comparision of real waste (MSW and MPW) pyrolysis in batch reactor over different catalysts. Part I: Product yields, gas and pyrolysis oil properties

Cited by 166 publications

References 23 publications

Catalytic pyrolysis of waste plastic from electrical and electronic equipment

Catalytic pyrolysis of waste plastic from electrical and electronic equipment

Characterization of biochars produced from pyrolysis of pelletized agricultural residues

Study on Dissolution of Low Density Polyethylene (LDPE)

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