Abnormal promotion effect of nitromethane on ethane ignition

Shang，Yanlei1; Shi，Jinchun2; Ning，Hongbo1; Zhang，Runtong3; Luo，S. N.1

2021

10.1016/j.combustflame.2020.10.022

COMBUSTION AND FLAME   影响因子和分区

0010-2180

1556-2921

The promotion effect of nitromethane (NM) on ethane ignition is studied in a heated shock tube. An unusual promotion effect of NM is observed: the ignition delay time of blends first decreases and then increases with increasing NM blending ratio, and the promotion effect peaks at blending ratio of 0.5. A model from our recent study [Fuel, 2019, 256: 115956] can reproduce the measurements and the abnormal promotion effect of NM. The kinetic analyses indicate that the radical pool establishment is slow for ethane, but much faster for NM due to the weak C–N bond. After the first-stage ignition of NM, most radicals are consumed and the radical pool needs to be re-established. In the ethane/NM blends, ethyl radicals, produced from the H-atom abstraction from ethane, can accelerate the re-establishment of the radical pool and then lead to a faster ignition delay time in comparison to neat ethane and NM, thus resulting in an abnormal promotion effect.

Abnormal ignition promotion Ethane Nitromethane Shock tube

SCI ; EI

英语

其他

20204309388047

Ethane ; Blending ; Ignition ; Lakes

Fuel Combustion:521.1 ; Chemical Operations:802.3 ; Organic Compounds:804.1

ENGINEERING

2-s2.0-85092925402

Scopus

1.Key Laboratory of Advanced Technologies of Materials,Ministry of Education,Southwest Jiaotong University,Chengdu,China
2.The Peac Institute of Multiscale Sciences,Chengdu,China
3.Department of Chemistry,Southern University of Science and Technology,Shenzhen,China

Shang，Yanlei,Shi，Jinchun,Ning，Hongbo,et al. Abnormal promotion effect of nitromethane on ethane ignition[J]. COMBUSTION AND FLAME,2021,223:267-270.

Shang，Yanlei,Shi，Jinchun,Ning，Hongbo,Zhang，Runtong,&Luo，S. N..(2021).Abnormal promotion effect of nitromethane on ethane ignition.COMBUSTION AND FLAME,223,267-270.

Shang，Yanlei,et al."Abnormal promotion effect of nitromethane on ethane ignition".COMBUSTION AND FLAME 223(2021):267-270.