Abstract: The non-catalytic partial oxidation of methane under fuel-rich conditions was studied in a nozzle type reactor. The influences of preheating temperature, molar ratio of oxygen to CH4 and ethane and propane addition on the process were studied. The axial concentration profiles of species were measured with a mass spectrometer using a sampling probe that could be moved along the length of the reactor. The molar fraction of acetylene had a maximum value along axial distance, and increasing oxygen ratio led to decreasing of acetylene selectivity. Increasing the preheating temperature is favorable to acetylene production and the concentration of acetylene was 4.52% when preheating temperature reached 620℃. Addition of ethane and propane resulted in the same amount of acetylene with less methane consumption. In the experimental conditions the axial distance of maximum acetylene molar fraction was kept in 80 mm unchanged.

Key words: methane, acetylene, on-catalytic partial oxidation, probe sampling, preheating temperature

摘要： 通过探头取样和四极杆质谱在线测量甲烷、氧气和乙炔等组分的浓度分布，考察了氧气/甲烷(甲烷+乙烷/丙烷)摩尔比、气体预热温度及原料气中添加乙烷和丙烷对甲烷非催化部分氧化制乙炔和合成气的影响. 结果表明，随轴向距离增加，乙炔浓度先增大后减小，存在最大值；随氧气/甲烷(甲烷+乙烷/丙烷)摩尔比增加，乙炔选择性下降；升高混合气体预热温度产物中乙炔浓度增大，620℃时最大乙炔浓度为4.52%；添加乙烷和丙烷时产物中乙炔浓度基本不变，但甲烷消耗量下降. 在实验条件下，生成最大乙炔浓度的激冷位置距烧嘴出口的距离约为80 mm.

关键词: 甲烷, 乙炔, 非催化部分氧化, 探头取样, 预热温度