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 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: Textile waste, Thermogravimetric analysis, Kinetic, Gas analysis, FT-IR and MS spectroscopy, THERMAL-DECOMPOSITION, CARBON, TORREFACTION, BIOMASS, APPROXIMATIONS, ACTIVATION, CONVERSION, FEEDSTOCK, BIOENERGY
  • Anadolu Üniversitesi Adresli: Evet

Özet

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 appli-cable 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 en-tropy changes were estimated.The gasses that evolved during pyrolysis were identified by simultaneous moni-toring 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.