Decomposition of gaseous terephthalic acid in the presence of CaO

Shogo Kumagai; Guido Grause; Tomohito Kameda; Tatsuo Takano; Hideki Horiuchi; Toshiaki Yoshioka

doi:10.1021/ie101457k

Decomposition of gaseous terephthalic acid in the presence of CaO

Shogo Kumagai, Guido Grause, Tomohito Kameda, Tatsuo Takano, Hideki Horiuchi, Toshiaki Yoshioka

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

The decomposition of PET during thermal treatment of municipal waste results in the formation of sublimating substances such as terephthalic acid (TPA) and benzoic acid, causing blockage and corrosion of pipes in the treatment facilities. To prevent these effects, TPA can be decarboxylated in the presence of calcium oxide (CaO) to obtain benzene as the main product. However, high concentrations of TPA cause the formation of large char fractions, reducing the yield of desired products. In this investigation, TPA was decarboxylated using a fixed-bed reactor filled with CaO. To increase the yield of benzene and reduce the carbonaceous residue, the effects of pyrolysis temperature and TPA feed rate were investigated. The best results were achieved at 500 °C and a TPA feed rate of 51 mg L¹, yielding 67% benzene with a purity of 99.2% and a carbonaceous residue containing 18% of the initial carbon.

Original language	English
Pages (from-to)	1831-1836
Number of pages	6
Journal	Industrial and Engineering Chemistry Research
Volume	50
Issue number	4
DOIs	https://doi.org/10.1021/ie101457k
Publication status	Published - 2011 Feb 16

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Industrial and Manufacturing Engineering

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title = "Decomposition of gaseous terephthalic acid in the presence of CaO",

abstract = "The decomposition of PET during thermal treatment of municipal waste results in the formation of sublimating substances such as terephthalic acid (TPA) and benzoic acid, causing blockage and corrosion of pipes in the treatment facilities. To prevent these effects, TPA can be decarboxylated in the presence of calcium oxide (CaO) to obtain benzene as the main product. However, high concentrations of TPA cause the formation of large char fractions, reducing the yield of desired products. In this investigation, TPA was decarboxylated using a fixed-bed reactor filled with CaO. To increase the yield of benzene and reduce the carbonaceous residue, the effects of pyrolysis temperature and TPA feed rate were investigated. The best results were achieved at 500 °C and a TPA feed rate of 51 mg L1, yielding 67% benzene with a purity of 99.2% and a carbonaceous residue containing 18% of the initial carbon.",

author = "Shogo Kumagai and Guido Grause and Tomohito Kameda and Tatsuo Takano and Hideki Horiuchi and Toshiaki Yoshioka",

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AU - Kumagai, Shogo

AU - Grause, Guido

AU - Kameda, Tomohito

AU - Takano, Tatsuo

AU - Horiuchi, Hideki

AU - Yoshioka, Toshiaki

PY - 2011/2/16

Y1 - 2011/2/16

N2 - The decomposition of PET during thermal treatment of municipal waste results in the formation of sublimating substances such as terephthalic acid (TPA) and benzoic acid, causing blockage and corrosion of pipes in the treatment facilities. To prevent these effects, TPA can be decarboxylated in the presence of calcium oxide (CaO) to obtain benzene as the main product. However, high concentrations of TPA cause the formation of large char fractions, reducing the yield of desired products. In this investigation, TPA was decarboxylated using a fixed-bed reactor filled with CaO. To increase the yield of benzene and reduce the carbonaceous residue, the effects of pyrolysis temperature and TPA feed rate were investigated. The best results were achieved at 500 °C and a TPA feed rate of 51 mg L1, yielding 67% benzene with a purity of 99.2% and a carbonaceous residue containing 18% of the initial carbon.

AB - The decomposition of PET during thermal treatment of municipal waste results in the formation of sublimating substances such as terephthalic acid (TPA) and benzoic acid, causing blockage and corrosion of pipes in the treatment facilities. To prevent these effects, TPA can be decarboxylated in the presence of calcium oxide (CaO) to obtain benzene as the main product. However, high concentrations of TPA cause the formation of large char fractions, reducing the yield of desired products. In this investigation, TPA was decarboxylated using a fixed-bed reactor filled with CaO. To increase the yield of benzene and reduce the carbonaceous residue, the effects of pyrolysis temperature and TPA feed rate were investigated. The best results were achieved at 500 °C and a TPA feed rate of 51 mg L1, yielding 67% benzene with a purity of 99.2% and a carbonaceous residue containing 18% of the initial carbon.

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Decomposition of gaseous terephthalic acid in the presence of CaO

Abstract

ASJC Scopus subject areas

UN SDGs

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