Oxidation kinetics of maize stover char at low temperature based on surface area and temperature correction

Xiangjie Li, Fang He, Junmeng Cai, Frank Behrendt, Alba Dieguez-Alonso and Thomas Schliermann

Energy, 2022, vol. 241, issue C

Abstract: In utilization of biomass, kinetic data for char oxidation based on surface area are essential for prediction of burnout time of biomass, which is an important parameter in reactor design. In this study, experiments with maize stover char were performed in a simultaneous thermal analyzer (STA) to obtain these kinetic data. Mass loss and heat effect at different sample sizes were analyzed. A difference between recorded temperature and real reaction temperature of char oxidation was found to increase with increasing sample size. The shift of the mass loss rate curve resulting from this temperature difference was corrected. The CO/CO2 ratio was calculated to be 0.45 at low temperature (<500 °C) according to heat effect data. Based on corrected mass loss rate data and the CO/CO2 ratio, oxidation kinetic parameters (A = 6655 m s−1, E = 91.5 kJ mol−1) were obtained. Analysis also showed that oxygen transport resistance in a crucible was negligible compared with kinetic resistance at low temperature in STA. The oxidation kinetics based on surface area can be efficiently used to predict burnout time of piled combustion of biomass.

Keywords: Oxidation kinetics; Surface area; Low temperature; Temperature difference; CO/CO2 ratio; Transport/kinetic resistance (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544221031777
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:241:y:2022:i:c:s0360544221031777

DOI: 10.1016/j.energy.2021.122928

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().