University of Oulu

Jinjia Du, Lei Gao, Yong Yang, Guo Chen, Shenghui Guo, Mamdouh Omran, Jin Chen, Roger Ruan, Study on thermochemical characteristics properties and pyrolysis kinetics of the mixtures of waste corn stalk and pyrolusite, Bioresource Technology, Volume 324, 2021, 124660, ISSN 0960-8524,

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

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Author: Du, Jinjia1; Gao, Lei2; Yang, Yong3;
Organizations: 1Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
2Key Laboratory of Green-Chemistry Materials in University of Yunnan Province, Yunnan Minzu University, Kunming 650500, China
3Daxin Branch of CITIC Dameng Mining Industries Ltd., Chongzuo 532315, China
4Faculty of Technology, University of Oulu, Finland
5Center for Biorefining and Department of Bioproducts and Biosystems Engineering University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55108, USA
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 2.3 MB)
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Language: English
Published: Elsevier, 2021
Publish Date: 2023-01-04


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.

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Series: Bioresource technology
ISSN: 0960-8524
ISSN-E: 1873-2976
ISSN-L: 0960-8524
Volume: 324
Article number: 124660
DOI: 10.1016/j.biortech.2020.124660
Type of Publication: A1 Journal article – refereed
Field of Science: 218 Environmental engineering
Funding: 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.
Copyright information: © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license by