Degradation of polyethylene to aromatic hydrocarbons over metal-supported activated carbon catalysts

Uemichi, Yoshio; Makino, Yutaka; Kanazuka, Takaji

doi:10.1016/0165-2370(89)80008-7

Cited by 63 publications

(44 citation statements)

References 5 publications

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“…A different approach was followed by Uemichi et al [56] that used metals (Pt, Fe, Mo, Zn, Co, etc.) supported over activated carbons as catalysts for the catalytic degradation of polyethylene at 300…”

Section: Heterogeneous Catalystsmentioning

confidence: 99%

Catalytic Upgrading of Plastic Wastes

Aguado

Serrano

Escola

2006

Feedstock Recycling and Pyrolysis of Waste Plastics

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Section: Heterogeneous Catalystsmentioning

confidence: 99%

Catalytic Upgrading of Plastic Wastes

Aguado

Serrano

Escola

2006

Feedstock Recycling and Pyrolysis of Waste Plastics

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“…There is abundant literature on the chemical recycling of waste plastics and basic research on thermal decomposition, especially using catalyst [2]- [13]; e.g., the yield of product oil via plastic pyrolysis can be increased using ZSM-5 zeolite, red mud and mesoporous molecular sieves [14], [15]. However, plastics from electrical waste contain toxic brominated flame retardants, which pose a problem particularly for recycling [16]- [20].…”

Section: Intoroductionmentioning

confidence: 99%

Reduction in Content of Bromine Compounds in the Product Oil of Pyrolysis Using Synthetic Hydrotalcite

Morita¹,

Wajima²,

Nakagome³

2015

IJCEA

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Abstract-Polystyrene plastic samples containing brominated flame-retardants (BR-PS) were pyrolyzed at 400 C using hydrotalcite to reduce the content of bromine compounds in the oil produced, in comparison with using sand, zeolite-4A, and zeolite-13X. The bromine plastic sample was prepared by mixing tetrabromobisphenol A and polystyrene, and added to a glass reactor, together with hydrotalcite, sand, zeolite-4A, or zeolite-13X. The product oil obtained by pyrolysis at 400 C from the BR-PS was mainly composed of aromatic compounds, such as benzene, heptane, and toluene, and two bromine compounds, 2-methyl-2-bromopentane and 3-bromopropane. The product oil obtained using hydrotalcite contained aromatic compounds with low molecular weight, and bromine compounds were not detected. In comparison with the use of sea sand and molecular sieves, the amount of bromine compounds in residue decreased in the order of hydrotalcite > molecular sieves 13X > molecular sieves 4A > sand. Hydrotalcite thus trapped bromine in residue during the pyrolysis of BR-PS.

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“…Upon thermal decomposition, the plastic polymer is converted into oil, residual carbon, and gases, which can be used as a chemical raw material and fuel [6]. Furthermore, there is a rich literature on basic research and chemical recycling of waste plastic based on thermal decomposition in the presence of a catalyst [7]- [18]. WEEE plastics typically consist of a flame retardant containing halogen compounds, and thus require special handling.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hydrotalcite on Bromine Content in Oil Produced from the Pyrolysis of Acrylonitrile-Butadiene-Styrene Plastics

Morita¹,

Nakayasu²,

Wajima³

et al. 2016

IJCEA

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Abstract-In this study, a method is presented to reduce the halogen concentration in the oil produced upon pyrolysis of acrylonitrile-butadiene-styrene (ABS) resins containing brominated flame retardants. More specifically, hydrotalcite was added to a predetermined amount of ABS in a glass reactor, and subjected to pyrolysis at 400 °C in nitrogen atmosphere. The bromine content in the product oil, residue, and gas released upon pyrolysis was analyzed. The main components of the product oil following pyrolysis of ABS in the absence of hydrotalcite additive were toluene, ethylbenzene, styrene, 1-bromomethyl-4-methylbenzene, phenol, n-butyl benzene, 1-methoxy-1-methylethyl benzene, and bromine compounds 2-bromophenol, 4-benzyloxy bromobenzene, 2,6 dibromophenol, and 2-bromotoluene. In contrast, the content of bromine in the product oil decreased when hydrotalcite was added to ABS. Moreover, negligible amounts of bromine were detected when the amount of added hydrotalcite was greater than 8 g. The reduced content of bromine in the product oil was attributed to the efficient trapping of bromine in the hydrotalcite matrix (as determined by the content of bromine in the residue).

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Degradation of polyethylene to aromatic hydrocarbons over metal-supported activated carbon catalysts

Cited by 63 publications

References 5 publications

Catalytic Upgrading of Plastic Wastes

Catalytic Upgrading of Plastic Wastes

Reduction in Content of Bromine Compounds in the Product Oil of Pyrolysis Using Synthetic Hydrotalcite

Effect of Hydrotalcite on Bromine Content in Oil Produced from the Pyrolysis of Acrylonitrile-Butadiene-Styrene Plastics

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