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Pyrolysis kinetics behavior of solid leather wastes.

Yuepeng Guan1, Chengqiang Liu1, Qifan Peng1

  • 1Beijing Laboratory of Biomedical Materials, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China.

Waste Management (New York, N.Y.)
|September 20, 2019
PubMed
Summary

Solid leather wastes (SLWs) from the leather industry show potential for bioenergy and carbon production. Thermochemical analysis reveals their thermal degradation behavior and kinetic parameters, suggesting viable feedstock for conversion processes.

Keywords:
BioenergyLeather solid wastesPyrolysisSustainableThermochemical

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • The leather industry generates substantial non-recyclable solid leather wastes (SLWs).
  • Chromium-tanned leather shavings are a major component of these SLWs.
  • Effective waste management and valorization strategies are needed.

Purpose of the Study:

  • To analyze the thermal degradation behavior of chromium-tanned leather shavings.
  • To determine the kinetic parameters of the degradation process.
  • To evaluate SLWs as a potential feedstock for bioenergy and carbon materials.

Main Methods:

  • Non-isothermal thermogravimetric analysis (TGA) was employed.
  • Pyrolysis experiments were conducted under a nitrogen atmosphere from 30 to 800°C at various heating rates (5-20°C/min).
  • Kinetic models including Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), and Kissinger methods were used.

Main Results:

  • The thermal degradation behavior of chromium-tanned leather shavings was characterized.
  • Activation energy values were calculated as 391.79 kJ/mol (FWO) and 348.77 kJ/mol (KAS).
  • SLWs exhibited a high higher heating value (HHV) of 14.15 MJ/kg and carbon productivity of 10.15%.

Conclusions:

  • Solid leather wastes are a promising candidate material for bioenergy production and carbon preparation.
  • The determined kinetic parameters are valuable for designing thermochemical conversion processes.
  • Valorization of SLWs can contribute to sustainable waste management in the leather industry.