TY - JOUR
T1 - Kinetic modeling and experimental investigation of laminar burning velocity in 2- and 3-pentanone/ammonia premixed flames
AU - He, Xu
AU - Zhao, Chengyuan
AU - Feng, Guangyuan
AU - Zhou, Xiaoran
AU - Liu, Zechang
AU - Wang, Zhi
AU - Chen, Qingchu
N1 - Publisher Copyright:
© 2025
PY - 2025/6/15
Y1 - 2025/6/15
N2 - In recent years, pentanone, a biomass-derived fuel, has attracted significant attention in the field of combustion due to its excellent anti-knock properties and high energy density. To address the low reactivity inherent in ammonia (NH3) combustion, blending pentanone with NH3 has emerged as a promising strategy. This study investigates laminar burning velocities (LBVs) of 2-pentanone (nPMK)/NH3 mixtures at pressures of 1 atm and 3 atm, with a temperature of 448 K and nPMK mole fractions ranging from 0.1 to 1.0. Additionally, building upon the authors’ previous research on 3-pentanone (DEK)/NH3 mixtures, a comparative analysis was conducted to evaluate the effects of both linear pentanone isomers on NH3 flame propagation. The kinetic model utilized is an extension of an earlier pentanone-NH3 model, which has been further refined using the latest experimental data and prior research findings. The results show that blending 50 % DEK with NH3 can increase LBV by up to 350 % compared to pure NH3-air mixtures, while nPMK achieves a maximum LBV increase of 300 %, underscoring pentanone's potential to enhance NH3 combustion performance. Under stoichiometric conditions, the LBV of DEK/NH3-air mixtures is consistently 3–4 cm/s higher than that of nPMK/NH3-air mixtures, suggesting that DEK is more effective in improving NH3 combustion characteristics. Kinetic analysis reveals the difference in LBV is primarily attributable to variations in radical concentrations. Specifically, the position of the carbonyl group in each isomer results in different oxidation intermediates (i.e., CH3 for nPMK and C2H5 for DEK). In nPMK/NH3-air flames, CH3 primarily participates in the chain-terminating reaction CH3 + H(+M) = CH4(+M), consuming significant quantities of H radicals and suppressing flame propagation. In contrast, C2H5 in DEK undergo β-C–H bond scission, generating H radicals that promote flame propagation. Consequently, DEK/NH3-air mixtures exhibit higher reactivity and faster LBVs.
AB - In recent years, pentanone, a biomass-derived fuel, has attracted significant attention in the field of combustion due to its excellent anti-knock properties and high energy density. To address the low reactivity inherent in ammonia (NH3) combustion, blending pentanone with NH3 has emerged as a promising strategy. This study investigates laminar burning velocities (LBVs) of 2-pentanone (nPMK)/NH3 mixtures at pressures of 1 atm and 3 atm, with a temperature of 448 K and nPMK mole fractions ranging from 0.1 to 1.0. Additionally, building upon the authors’ previous research on 3-pentanone (DEK)/NH3 mixtures, a comparative analysis was conducted to evaluate the effects of both linear pentanone isomers on NH3 flame propagation. The kinetic model utilized is an extension of an earlier pentanone-NH3 model, which has been further refined using the latest experimental data and prior research findings. The results show that blending 50 % DEK with NH3 can increase LBV by up to 350 % compared to pure NH3-air mixtures, while nPMK achieves a maximum LBV increase of 300 %, underscoring pentanone's potential to enhance NH3 combustion performance. Under stoichiometric conditions, the LBV of DEK/NH3-air mixtures is consistently 3–4 cm/s higher than that of nPMK/NH3-air mixtures, suggesting that DEK is more effective in improving NH3 combustion characteristics. Kinetic analysis reveals the difference in LBV is primarily attributable to variations in radical concentrations. Specifically, the position of the carbonyl group in each isomer results in different oxidation intermediates (i.e., CH3 for nPMK and C2H5 for DEK). In nPMK/NH3-air flames, CH3 primarily participates in the chain-terminating reaction CH3 + H(+M) = CH4(+M), consuming significant quantities of H radicals and suppressing flame propagation. In contrast, C2H5 in DEK undergo β-C–H bond scission, generating H radicals that promote flame propagation. Consequently, DEK/NH3-air mixtures exhibit higher reactivity and faster LBVs.
KW - Ammonia
KW - Kinetic model
KW - Laminar burning velocity
KW - Pentanone
UR - http://www.scopus.com/inward/record.url?scp=85217748671&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2025.134698
DO - 10.1016/j.fuel.2025.134698
M3 - Article
AN - SCOPUS:85217748671
SN - 0016-2361
VL - 390
JO - Fuel
JF - Fuel
M1 - 134698
ER -