TY - JOUR
T1 - Primary Combustion Intermediates in Low-pressure Premixed Laminar 2,5-Dimethylfuran/Oxygen/Argon Flames
AU - Wei, Lixia
AU - Tong, Laihui
AU - Xu, Jia
AU - Wang, Zhandong
AU - Jin, Hanfeng
AU - Yao, Mingfa
AU - Zheng, Zunqing
AU - Li, Haiying
AU - Xu, Hongming
PY - 2014/2/24
Y1 - 2014/2/24
N2 - Primary combustion intermediates in low-pressure premixed laminar 2,5-dimethylfuran (DMF)/oxygen (O2)/argon (Ar) flames with equivalence ratios of 0.8 and 1.5 were investigated by using tunable synchrotron vacuum ultraviolet photoionization and molecular-beam mass spectrometry. DMF is a promising biofuel, with properties similar to those of gasoline. However, the combustion chemistry of DMF is not well-studied. Possible reaction pathways of DMF and its primary combustion derivatives were proposed based on the combustion intermediates identified in this work. Photoionization efficiency curves (PIEs) of the combustion intermediates in the DMF/O2/Ar flames were recorded. Ionization energies (IEs) were measured from the PIEs. The combustion intermediates were identified by the agreement of the measured IEs with those reported in the literatures or calculated at G3B3 level. H abstraction and the consecutive reaction products were identified, including 5-methylfurfural, (Z)-1-oxo-1,3,4-pentatriene, and 2-ethyl-5-methylfuran, etc. Furan was not observed in the low-pressure DMF flames. H and OH addition products were also identified, including 2-methylfuran, (2Z,3E)-1-oxo-1,3-pentadiene, and 2-oxo-2,3-dihydro-5-methylfuran. The extra methyl side chain may explain the lower laminar burning velocity of DMF relative to that of 2-methylfuran.
AB - Primary combustion intermediates in low-pressure premixed laminar 2,5-dimethylfuran (DMF)/oxygen (O2)/argon (Ar) flames with equivalence ratios of 0.8 and 1.5 were investigated by using tunable synchrotron vacuum ultraviolet photoionization and molecular-beam mass spectrometry. DMF is a promising biofuel, with properties similar to those of gasoline. However, the combustion chemistry of DMF is not well-studied. Possible reaction pathways of DMF and its primary combustion derivatives were proposed based on the combustion intermediates identified in this work. Photoionization efficiency curves (PIEs) of the combustion intermediates in the DMF/O2/Ar flames were recorded. Ionization energies (IEs) were measured from the PIEs. The combustion intermediates were identified by the agreement of the measured IEs with those reported in the literatures or calculated at G3B3 level. H abstraction and the consecutive reaction products were identified, including 5-methylfurfural, (Z)-1-oxo-1,3,4-pentatriene, and 2-ethyl-5-methylfuran, etc. Furan was not observed in the low-pressure DMF flames. H and OH addition products were also identified, including 2-methylfuran, (2Z,3E)-1-oxo-1,3-pentadiene, and 2-oxo-2,3-dihydro-5-methylfuran. The extra methyl side chain may explain the lower laminar burning velocity of DMF relative to that of 2-methylfuran.
KW - Combustion
KW - 2,5-Dimethylfuran
KW - Intermediate
U2 - 10.1080/00102202.2013.857666
DO - 10.1080/00102202.2013.857666
M3 - Article
SN - 0010-2202
VL - 186
SP - 355
EP - 376
JO - Combustion Science and Technology
JF - Combustion Science and Technology
IS - 3
ER -