Study on Liquefaction Behavior of PET under Catalysis with Camellia Shell C⁃SO3H Solid Acid

doi:10.19491/j.issn.1001-9278.2021.03.015

Abstract

Abstract:

In this paper， a new type of carbon-based solid acid catalyst （C-SO3H） was successfully prepared after a series of carbonization and sulfonation using waste biomass camellia husk as raw material. The catalytic ability was performance by catalyzing waste polyethylene terephthalate. The product of the alcoholysis reaction were also characterized by infrared spectroscopy and nuclear magnetic spectroscopy. In additin， the alcoholysis reaction kinetics and mechanism of were also analyzed in this paper.By investigating the influence of factors such as temperature and concentration during the catalyst preparation process， the result manifest that the best preparation conditions are：impregnation ratio 1∶1， impregnation concentration 2 mol/L， carbonization temperature 700 ℃， sulfonation temperature 160 ℃. The maximum PET conversion rate and BHET recovery rate were 95 % and 68 %， respectively. In addition， powder diffraction shows that the catalyst has an amorphous carbon structure， infrared spectroscopy shows that the catalyst contains a large number of hydroxyl groups， scanning electron microscopy shows that the catalyst has pores， exhibting a large specific surface area. The product of alcoholysis reaction was monomer BHET.

Key words: poly（ethylene terephthalate）, sulfonate, camellia oleifera, catalyst, kinetics

CLC Number:

TQ323.4

LIU Runqing, XING Mingming, HUANG Jiming. Study on Liquefaction Behavior of PET under Catalysis with Camellia Shell C⁃SO₃H Solid Acid[J]. China Plastics, 2021, 35(3): 105-111.

Figures/Tables 12

Fig.1. Equation for the alcoholysis of PET

Fig.2. FTIR spectra of the catalyst

Fig.3. XRD pattern of the catalyst

Fig.4. SEM pictures of the catalyst

Fig.5. Influence of impregnation ratio on catalyst properties

Fig.6. Influence of impregnation concentration on catalyst properties

Fig.7. Influence of carbonization temperature on catalyst properties

Fig.8. Influence of sulfonation temperature on catalyst properties

Fig.9. FTIR spectrum of BHET

Fig.10. 1H?NMR spectrum of BHET

Fig.11. Influence of reaction time on conversion of PET

Fig.12. Kinetic expression for conversion of PET

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Study on Liquefaction Behavior of PET under Catalysis with Camellia Shell C⁃SO₃H Solid Acid

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Figures/Tables 12

References 26

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