TY - JOUR
T1 - Evaluating combustion characteristics and combustion kinetics of corn stover-derived hydrochars by cone calorimeter
AU - Tahmid Islam, Md
AU - Klinger, Jordan L.
AU - Toufiq Reza, M.
N1 - Funding Information:
The material is based upon work supported by United States Department of Agriculture, grant number 2019-67019-31594. The authors are grateful for the air classification technology of the Biomass Feedstock National User Facility (BFNUF) at Idaho National Laboratory. The authors also acknowledge the laboratory assistance from Adam Scannell from Biofuels Lab, Dr. Gordon Nelson from the Fire Lab at Florida Institute of Technology and Jumayel Islam for kinetic model development.
Funding Information:
The material is based upon work supported by United States Department of Agriculture, grant number 2019-67019-31594. The authors are grateful for the air classification technology of the Biomass Feedstock National User Facility (BFNUF) at Idaho National Laboratory. The authors also acknowledge the laboratory assistance from Adam Scannell from Biofuels Lab, Dr. Gordon Nelson from the Fire Lab at Florida Institute of Technology and Jumayel Islam for kinetic model development.
Publisher Copyright:
© 2022 The Author(s)
PY - 2023/1/15
Y1 - 2023/1/15
N2 - This study investigated the combustion properties of corn stover-derived hydrochars using cone calorimeter. Hydrochars were prepared by hydrothermal carbonization (HTC) at 200, 230, and 260 °C for 30 min. Six different heat fluxes (5–50 kW/m2) were applied to hydrochars to determine critical heat flux (CHF), ignition temperature, thermal response, peak heat release rate (pHRR), thermal hazard risk, and combustion efficiency. Results show that increasing the HTC temperature decreased the CHF and ignition temperature but increased the thermal resistivity. Increasing the heat flux decreased the thermal resistivity and ignition time of all the hydrochars. Thermal hazard analysis indicated that the hydrochars posed lower thermal risk than raw corn stover. Finally, combustion kinetics were proposed using two parallel first order reactions for volatile matters and fixed carbon. The reaction rate of volatile matter was significantly higher than the reaction rate of fixed carbon. HTC increased the fixed carbon activation energies to as high as 24.0 MJ/mol. Overall, HTC forms hydrochars which are less flammable, more stable, and a lower thermally risk material for piloted ignition than raw corn stover.
AB - This study investigated the combustion properties of corn stover-derived hydrochars using cone calorimeter. Hydrochars were prepared by hydrothermal carbonization (HTC) at 200, 230, and 260 °C for 30 min. Six different heat fluxes (5–50 kW/m2) were applied to hydrochars to determine critical heat flux (CHF), ignition temperature, thermal response, peak heat release rate (pHRR), thermal hazard risk, and combustion efficiency. Results show that increasing the HTC temperature decreased the CHF and ignition temperature but increased the thermal resistivity. Increasing the heat flux decreased the thermal resistivity and ignition time of all the hydrochars. Thermal hazard analysis indicated that the hydrochars posed lower thermal risk than raw corn stover. Finally, combustion kinetics were proposed using two parallel first order reactions for volatile matters and fixed carbon. The reaction rate of volatile matter was significantly higher than the reaction rate of fixed carbon. HTC increased the fixed carbon activation energies to as high as 24.0 MJ/mol. Overall, HTC forms hydrochars which are less flammable, more stable, and a lower thermally risk material for piloted ignition than raw corn stover.
KW - Combustion kinetics
KW - Cone calorimeter
KW - Corn stover
KW - Critical heat flux
KW - Hydrochar
KW - Peak heat release rate
UR - https://www.scopus.com/pages/publications/85138828472
UR - https://www.mendeley.com/catalogue/b2d67cc7-e038-3fb3-a3cb-7e9cf5090f39/
U2 - 10.1016/j.cej.2022.139419
DO - 10.1016/j.cej.2022.139419
M3 - Article
AN - SCOPUS:85138828472
SN - 1385-8947
VL - 452
JO - Chemical engineering journal
JF - Chemical engineering journal
M1 - 139419
ER -