Effects of the types of zeolites on catalytic upgrading of pyrolysis wax oil

Lee, Kyong-Hwan

doi:10.1016/j.jaap.2011.12.015

Cited by 112 publications

(75 citation statements)

References 17 publications

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“…The products obtained from the pyrolysis can be divided into non-condensable gas fraction, liquid fraction (consisting of paraffins, olefins, naphthenes and aromatics) and solid waste. From the liquid fraction can be recovered hydrocarbons in the gasoline range (C4-C12), diesel (C12-C23), kerosene (C10-C18) and motor oil (C23-C40) [1,3,18,20,[33][34][35] .…”

Section: Thermal Pyrolysismentioning

confidence: 99%

“…A wide variety of heterogeneous catalysts has been used and among them are: conventional solid acids (such as zeolites, silica-alumina, alumina and FCC catalysts (Fluid Catalytic Cracking)), mesostructured catalysts (such as MCM-41 etc. ), nanocrystalline zeolites (such as n-HZSM-5), among others [25,35,36,39] . Many studies have been carried out describing the cracking of pure polyolefins over various solid acids such as zeolites, clays, among others.…”

Section: Catalytic Pyrolysismentioning

confidence: 99%

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Thermal and catalytic pyrolysis of plastic waste

2016

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Section: Thermal Pyrolysismentioning

confidence: 99%

Section: Catalytic Pyrolysismentioning

confidence: 99%

Thermal and catalytic pyrolysis of plastic waste

2016

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“…Lee [20] pore structures in addition to the differences in Si:Al ratio. Therefore, the results of Lee et al [20] suggest that surface acidity has more influence on the aromatic forming catalytic reactions of the pyrolysis degradation products than the catalyst surface area and wider pore size as found in the Y zeolite.…”

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

104

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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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“…The pyrolysis wax oil has much higher boiling point distribution, ranging from approximately 300 O C to 550 O C, compared to those of commercial oils. It mainly consists of paraffin components and a very wide carbon number distribution ranging from an approximate carbon number of 10 to a carbon number of nearly 40 (Lee, 2012).…”

Section: Fixed Bed Reactormentioning

confidence: 99%

“…Five commercial zeolite catalysts (ZSM-5, zeolite Y and mordenite, with or without clay or alumina as a supporter) used have their unique and different physicochemical properties. (Lee, 2012 Table 5. Product distribution for catalytic upgrading of pyrolysis wax oil at 450 O C, 1hr (Lee, 2012).…”

Section: Fixed Bed Reactormentioning

confidence: 99%