Effects of zeolites on the pyrolysis of polypropylene

Zhao, Wenwei; Hasegawa, Shin; Fujita, Jun; Yoshii, Fumio; Sasaki, Takashi; Makuuchi, Keizo; Sun, Junqi; Nishimoto, Sei‐ichi

doi:10.1016/0141-3910(96)00080-8

Cited by 63 publications

(27 citation statements)

References 19 publications

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“…For example, the use of a catalyst has been proposed as a way to, improve the yield of valuable products in the oil, to reduce the temperature of reaction, increase the yield of gas or alter the composition of the oil product (Bagri and Williams, 2002;Isoda et al, 1998;Lin et al, 1998;Zhao et al, 1996;Mordi et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Hydrocarbon gases and oils from the recycling of polystyrene waste by catalytic pyrolysis

Williams

Bagri

2003

Int. J. Energy Res.

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SUMMARYThe yield and composition of oils and gases derived from the pyrolysis and catalytic pyrolysis of polystyrene has been investigated. The pyrolysis and catalytic pyrolysis was carried out in a fixed bed reactor. Two catalysts were used, zeolite ZSM-5 and Y-zeolite and the influence of the temperature of the catalyst, the amount of catalyst loading and the use of a mixture of the two catalysts was investigated. The main product from the uncatalysed pyrolysis of polystyrene was an oil consisting mostly of styrene and other aromatic hydrocarbons. The gases were found to consist of methane, ethane, ethene, propane, propene, butane and butene. In the presence of either catalyst an increase in the yield of gas and decrease in the amount of oil produced was found, but there was significant formation of carbonaceous coke on the catalyst. Increasing the temperature of the Y-zeolite catalyst and also the amount of catalyst in the catalyst bed resulted in a decrease in the yield of oil and increase in the yield of gas.

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Section: Introductionmentioning

confidence: 99%

Hydrocarbon gases and oils from the recycling of polystyrene waste by catalytic pyrolysis

Williams

Bagri

2003

Int. J. Energy Res.

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“…[1][2][3][4][5][6][7][8][9][10] The advantages of catalytic pyrolysis against thermal pyrolysis are lower degradation temperatures and a narrower molecular size distribution of products. 3,4 As a result of these advantages, catalytic pyrolysis has been an attractive research topic in the area of waste recycling technology. However, economic efficiency still remains a problem because commercial catalysts are generally expensive and have a relatively short life in the pyrolysis process.…”

Section: Introductionmentioning

confidence: 99%

“…, FSA(1 [2][3][4][5][6][7][8]. has the largest BET surface area and pore volume, followed by FSA(1Boiling point distribution of the liquid products obtained from the pyrolysis of LDPE using different catalysts X-ray diffraction patterns of a FSAs and b fused fly ashes.…”

mentioning

confidence: 99%

Pyrolysis of low-density polyethylene using synthetic catalysts produced from fly ash

Jeong

Chung

et al. 2006

J Mater Cycles Waste Manag

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Catalytic pyrolysis of low-density polyethylene (LDPE) was investigated using various fly ash-derived silica-alumina catalysts (FSAs). FSAs were prepared by a simple activation method that basically includes NaOH treatment of fly ash by a fusion method, followed by an aging process. A series of LDPE pyrolysis experiments was conducted and the catalytic performance of FSAs was assessed in terms of the degradation temperature and the simulated boiling point distribution of the liquid products. The effects of synthesis conditions such as NaOH/fly ash weight ratio and aging time were examined by X-ray diffractometer (XRD), Brunauer-Emmett-Teller (BET) surface area analyzer, and scanning electron microscope to clarify the controlling factors affecting the catalytic activity. To obtain catalyst with high activity, it is necessary to produce sufficient silica and alumina species that can be easily co-precipitated into solid acid catalyst by destruction of the fly ash structure and to optimize the activation time for catalyst synthesis to prevent the transformation into inactive phases. The catalytic performance of FSA obtained from optimal conditions was equivalent to that of commercial catalysts, demonstrating the effectiveness of the catalyst.

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“…Some of the studies reported in the literature will be reviewed below. Zhao et al, 1996 have studied the effects of different zeolites as H-Y, Na-Y, L, H-mordenite and Na-mordenite on the catalytic degradation of PP by thermogravimetry under nitrogen flow. It was found that the degradation temperature of PP strongly depended on the type of zeolite used and the amount added.…”

Section: Catalyting Crackingmentioning

confidence: 99%

Recent Advances in the Chemical Recycling of Polymers (PP, PS, LDPE, HDPE, PVC, PC, Nylon, PMMA)

Achilias¹,

Andriotis²,

Koutsidis³

et al. 2012

Material Recycling - Trends and Perspectives

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Effects of zeolites on the pyrolysis of polypropylene

Cited by 63 publications

References 19 publications

Hydrocarbon gases and oils from the recycling of polystyrene waste by catalytic pyrolysis

Hydrocarbon gases and oils from the recycling of polystyrene waste by catalytic pyrolysis

Pyrolysis of low-density polyethylene using synthetic catalysts produced from fly ash

Recent Advances in the Chemical Recycling of Polymers (PP, PS, LDPE, HDPE, PVC, PC, Nylon, PMMA)

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