Time-resolved mid-infrared measurements of hydrogen peroxide in the low-temperature oxidation of iso-octane in a rapid compression machine
Time-resolved mid-infrared measurements of hydrogen peroxide in the low-temperature oxidation of iso-octane in a rapid compression machine
复制标题
快速压缩机中异辛烷低温氧化过程中过氧化氢的时间分辨中红外测量
DOI：
10.1080/00102202.2020.1855635
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发表时间：
2020
影响因子：
1.9
通讯作者：
Hisashi Nakamura
中科院分区：
文献类型：
--
作者：
Kotaro Tanaka;Shinya Sugano;Naoya Yokota;Satoshi Sakaida;Mitsuru Konno;Hisashi Nakamura
利用中红外吸收光谱对异辛烷低温氧化过程中过氧化氢(H_2O_2)在快速压缩装置中的时间分辨定量测定进行了研究。在8-μm区检测到H_2O_2，其中H_2O_2的吸收带最强。由于异辛烷和H2O在8-μm区的吸收干扰很小，在1.4m和3.5m-μ区分别检测到了H2O和异辛烷。用HITRAN数据库中的参数计算了H_2O_2和H_2O的截面，并用快速压缩装置分别在417-700℃和100-700 kPa的温度和压力范围内测量了异辛烷截面。获得了0.77 Mpa、642和660℃下异辛烷低温氧化的时间分辨定量H_2O_2谱，当量比为1.0。用该方法还获得了H2O和异辛烷的分布，同时测量了燃料低温氧化过程中多组分的定量时间分布，这也是新颖的。在实验条件下，异辛烷在低温氧化过程中生成了过氧化氢，其浓度在低温氧化结束到高温氧化开始之间逐渐增加。用最新的异辛烷化学动力学模型计算得到的H_2O_2分布与实验分布趋势一致。
Time-resolved quantitative measurements of hydrogen peroxide (H2O2) in the low-temperature oxidation of iso-octane in a rapid compression machine have been performed using mid-infrared absorption spectroscopy. H2O2was detected in the 8-μm region, wherein H2O2has the strongest absorption band. Owing to the weak interference of the absorption of iso-octane and H2O in the 8-μm region, H2O and iso-octane were detected in the 1.4- and 3.5-μm region, respectively. The cross-sections of H2O2and H2O were calculated using parameters in the HITRAN database, and the iso-octane cross-section was measured using a rapid compression machine in the temperature and pressure ranges of 417–700 K and 100–700 kPa, respectively. The time-resolved quantitative H2O2profiles in the low-temperature oxidation of iso-octane at 0.77 MPa, 642 and 660 K, and an equivalence ratio of 1.0 were successfully obtained. The H2O and iso-octane profiles were also obtained using this measurement method; the simultaneous measurements of the quantitative time profiles of multi-species in the low-temperature oxidation of fuels are also novel. Under experimental conditions, H2O2was formed during the low-temperature oxidation of iso-octane, and its concentration gradually increased between the end of the low-temperature oxidation and start of the high-temperature oxidation. The calculated H2O2profiles obtained using the latest chemical kinetic model of iso-octane showed the same tendency as the experimental profiles.