An investigation on pyrolysis of textile wastes: Kinetics, thermodynamics, in-situ monitoring of evolved gasses and analysis of the char residue

ÖZSİN G., Pütün A. E.

Journal of Environmental Chemical Engineering, cilt.10, sa.3, 2022 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 10 Sayı: 3
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.jece.2022.107748
  • Dergi Adı: Journal of Environmental Chemical Engineering
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, CAB Abstracts, Chemical Abstracts Core, Compendex, INSPEC, Veterinary Science Database
  • Anahtar Kelimeler: FT-IR and MS spectroscopy, Gas analysis, Kinetic, Textile waste, Thermogravimetric analysis
  • Bilecik Şeyh Edebali Üniversitesi Adresli: Evet

Özet

© 2022 Elsevier Ltd.Recycling the ever-increasing industrial waste has become a pressing concern globally and pyrolysis is regarded as one of the up-and-coming techniques to recover the energy and chemical content of organic wastes. The pyrolysis of a representative industrial waste as textile waste was investigated within the scope of this study. In this way, efficient thermochemical conversion processes may be designed and optimized by creating value-added products. Different heating rates were applied to determine pyrolysis behavior using a thermogravimetric analyzer (TGA) coupled with a mass spectrometer (MS) and a Fourier transform infrared spectrometer (FT-IR). According to the obtained thermograms, the active pyrolysis region was selected for studying the kinetics, various iso-conversional methods (Friedmann, Kissinger-Akahira-Sunose; Flynn-Wall-Ozawa and Starink) were applied to the non-isothermal TG data, and the results were compared among themselves. The mean activation energy was 186.7, 185.8, 185.1, and 185.5 kJ/mol for the Friedmann, Flynn-Wall-Ozawa, Kissinger-Akahira-Sunose, and Starink models, respectively. The activation energy variation was found in good agreement among different kinetic models. The activation energy changes that were found provided a representation of the process kinetics which were described by multiple reaction schemes. All four kinetic methods were found to be applicable to forecasting the non-isothermal pyrolysis of textile wastes, although the existence of small variations in the activation energy values. Furthermore, thermodynamic parameters as enthalpy, Gibbs free energy, and entropy changes were estimated.The gasses that evolved during pyrolysis were identified by simultaneous monitoring of MS and FT-IR spectra and the temperature-dependent alteration of main volatile products were obtained. Moreover, the char residue was analyzed via ex-situ SEM-EDX and FT-IR.