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<p>In this study, the influence of deep eutectic solvent (DES) pretreatment on the thermal degradation kinetics and thermodynamic behavior of three lignocellulosic wastes viz. corn stover (CS), peanut shell powder (PSP), and sugarcane bagasse (SCB) was explored. Choline chloride (ChCl) and glycerol based DESs were synthesized, and lignocellulose dissolution was performed under mild operating conditions. The thermogravimetric analysis (TGA) data was modeled using the Horowitz–Metzger method coupled with a range of reaction mechanisms to predict thermal activation energy (E) and thermodynamic parameters (∆H, ∆G, ∆S). The DES pretreatment substantially modified the lignocellulosic composition of all three materials promoting cellulose enrichment and removing lignin and hemicellulose from virgin material. These structural changes improved the thermal stability of the regenerated lignocellulosic fibers resulting in a marked increase in the values of activation energy, change in enthalpy (∆H) and change in Gibb’s free energy (∆G) of decomposition, with the most notable enhancements recorded for SCB.</p>

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Effect of deep eutectic solvent pretreatment on the pyrolytic kinetics of lignocellulosic waste for biorefinery development

  • 期刊论文

  • 发表日期：

    2025年10月4日

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  • Ali Raza,
  • Hamayoun Mahmood,
  • Muhammad Irfan,
  • Saqib Mehmood,
  • Abdulaal Zuhayr Al-Khazaal

摘要

In this study, the influence of deep eutectic solvent (DES) pretreatment on the thermal degradation kinetics and thermodynamic behavior of three lignocellulosic wastes viz. corn stover (CS), peanut shell powder (PSP), and sugarcane bagasse (SCB) was explored. Choline chloride (ChCl) and glycerol based DESs were synthesized, and lignocellulose dissolution was performed under mild operating conditions. The thermogravimetric analysis (TGA) data was modeled using the Horowitz–Metzger method coupled with a range of reaction mechanisms to predict thermal activation energy (E) and thermodynamic parameters (∆H, ∆G, ∆S). The DES pretreatment substantially modified the lignocellulosic composition of all three materials promoting cellulose enrichment and removing lignin and hemicellulose from virgin material. These structural changes improved the thermal stability of the regenerated lignocellulosic fibers resulting in a marked increase in the values of activation energy, change in enthalpy (∆H) and change in Gibb’s free energy (∆G) of decomposition, with the most notable enhancements recorded for SCB.