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Abstract <p>The accelerated accumulation of waste biomass and plastics presents challenges in environmental mitigation and resource recovery. This study investigates the catalytic co-pyrolysis of wheat straw (WS) lignocellulosic biomass and HDPE waste plastics, employing 5% Mn, Ni, and Zn-modified HZSM-5 extrudates to enhance thermal degradation and hydrocarbon yield. Thermogravimetric analysis (TGA) performed at heating rates of 5, 10, and 20&#xa0;°C/min revealed a significant reduction (~ 25%) in activation energy (Eα) with 5% Zn-HZSM-5, highlighting catalyst-induced synergistic interactions. Key thermodynamic parameters (ΔH, ΔG, ΔS) confirm the process feasibility, with an energy barrier of ~ 5&#xa0;kJ/mol between activation energy and enthalpy change, underscoring the efficiency of catalytic co-pyrolysis. This study provides critical insights into the mechanism and sustainability of converting waste biomass and plastics into valuable biofuels.</p> Graphical Abstract <p></p>

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Enhanced catalytic co-conversion of biomass and plastic volatiles using metal-enhanced HZSM-5 extrudates: a study on pyro-kinetic, synergistic, and thermodynamic efficacy

  • 期刊论文

  • 发表日期：

    2025年3月4日

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  • T. Nandakumar,
  • Uma Dwivedi,
  • Palmurukan M. Ramar,
  • K. K. Pant,
  • Sanat Kumar,
  • Ekambaram Balaraman

摘要

Abstract

The accelerated accumulation of waste biomass and plastics presents challenges in environmental mitigation and resource recovery. This study investigates the catalytic co-pyrolysis of wheat straw (WS) lignocellulosic biomass and HDPE waste plastics, employing 5% Mn, Ni, and Zn-modified HZSM-5 extrudates to enhance thermal degradation and hydrocarbon yield. Thermogravimetric analysis (TGA) performed at heating rates of 5, 10, and 20 °C/min revealed a significant reduction (~ 25%) in activation energy (Eα) with 5% Zn-HZSM-5, highlighting catalyst-induced synergistic interactions. Key thermodynamic parameters (ΔH, ΔG, ΔS) confirm the process feasibility, with an energy barrier of ~ 5 kJ/mol between activation energy and enthalpy change, underscoring the efficiency of catalytic co-pyrolysis. This study provides critical insights into the mechanism and sustainability of converting waste biomass and plastics into valuable biofuels.

Graphical Abstract