论文部分内容阅读
利用同步辐射真空紫外单光子电离,结合分子束取样质谱技术,对掺氢比为0%,20%,40%,60%和80%的甲烷-氢气-氧气-氩气低压层流预混火焰进行了实验研究.通过测量光电离质谱和光电离效率谱曲线,探测了甲烷-氢气-氧气-氩气火焰的中间物,得到了不同掺氢比甲烷-氢气-氧气-氩气火焰的主要产物H2,CH4,CO,CO2,O2和H2O的摩尔分数分布曲线,以及火焰中间产物CH3(甲基),C2H2(乙炔),CH2O(甲醛),CH3OH(甲醇),C2H4(乙烯)和C2H2O(乙烯酮)的摩尔分数分布曲线,分析了掺氢对火焰主要产物和中间产物摩尔分数的影响.实验结果表明,甲烷掺氢燃烧可以降低燃烧产物中CO,CO2和CH4摩尔分数.掺氢后实验测得的火焰中间产物摩尔分数均大幅降低,由于掺氢后火焰中H和OH摩尔分数增加,氢的强扩散性和活性增大了火焰化学反应速率,且掺氢后混合燃料H/C比值增加,使火焰C基中间产物摩尔分数降低,有助于降低不完全燃烧产物摩尔分数.
Using the synchrotron radiation vacuum ultraviolet single-photon ionization and molecular beam sampling mass spectrometry, the methane-hydrogen-oxygen-argon low-pressure laminar premixed flame with 0%, 20%, 40%, 60% and 80% The experimental results show that the main products of methane - hydrogen - oxygen - argon flame are detected by measuring the photoionization mass spectrometry and photoionization efficiency spectroscopy curves, and the main products of hydrogen - specific methane - hydrogen - oxygen - argon flame (CH3), C2H2 (acetylene), CH2O (formaldehyde), CH3OH (methanol), C2H4 (ethylene) and C2H2O (ethylene Ketone), the influence of hydrogen addition on the mole fraction of main products and intermediate products was analyzed.The experimental results show that methane doping can reduce the mole fraction of CO, CO2 and CH4 in the combustion products.Experimental results The mole fraction of intermediate product of the flame was significantly reduced. Due to the increase of molar fraction of H and OH in the flame after doping, the strong diffusivity and activity of hydrogen increased the flame chemical reaction rate, and the H / C ratio of blended fuel increased after hydrogen addition , So that the flame C-based intermediate product of the mole fraction decreased, helps to reduce Mole fraction of products of incomplete combustion.