Study on thermochemical characteristics properties and pyrolysis kinetics of the mixtures of waste corn stalk and pyrolusite

Jinjia Du, Lei Gao, Yong Yang, Guo Chen, Shenghui Guo, Mamdouh Omran, Jin Chen, Roger Ruan

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

As an alternative energy source for fossil energy, use of biomass pyrolysis to reduce pyrolusite is of great significance for energy conservation, emission reduction and environmental protection. Kinetics and thermodynamics of reducing pyrolusite using biomass pyrolysis was studied using thermogravimetric analysis analysis. Five non-isothermal methods, Flynn-Wall-Ozawa, Kissinger-Akahira-Sunose, Distributed Activation Energy Model, Starink and Friedman, were employed to calculate the pyrolysis kinetics and thermodynamic parameters. The results showed that pyrolusite reduction by biomass pyrolysis can be divided into four stages: drying stage (30–175 °C), rapid pyrolysis reduction stage (175–350 °C), slow pyrolysis reduction stage (350–680 °C) and char formation stage (680–900 °C). The apparent activation energy, reaction enthalpy, Gibbs free energy and entropy change of pyrolusite reduction by biomass pyrolysis was calculated ranges from 170 to 180 kJ/mol, 164 to 174 kJ/mol, 136.97 to 137.25 kJ/mol and 45.67 to 61.91 J/mol·K, respectively. This work provides theoretical basis and practical guidance for the reduction of pyrolusite by waste corn stalk.

Original languageEnglish (US)
Article number124660
JournalBioresource Technology
Volume324
DOIs
StatePublished - Mar 2021

Bibliographical note

Funding Information:
Financial supports from the National Natural Science Foundation of China (No.: U1802255 ), and Innovative Research Team (in Science and Technology) in University of Yunnan Province were sincerely acknowledged.

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

  • Mixed pyrolysis kinetics
  • Non-isothermal models
  • Pyrolusite
  • Thermodynamic analysis
  • Waste biomass

PubMed: MeSH publication types

  • Journal Article

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