随着国家油气增储上产与绿色环保战略加速，油气地面工程燃烧排放及其碳烟颗粒物引发的环境与生态压力日益凸显。科学理解油气燃烧碳烟成核、生长、氧化机制及加水蒸汽对碳烟生成影响是油气燃烧减排新技术开发的关键难题。为此，本项目拟系统研究油气代用燃料/水蒸汽扩散火焰，采用激光诱导炽光/荧光（LII/LIF）、发射光谱（CT）与透射电镜（TEM）等先进测试技术，检测温度、碳烟及前驱物浓度、粒径和微观形貌等特征信息；应用敏感性和反应路径理论，分析构建更准确、通用的化学动力学模型，改进2D-Flame源程序进而模拟碳烟温度、浓度、成核、生长及氧化率等关键参数，优化碳烟颗粒热适应系数，揭示油气（C1-C3烷烃、正庚烷、异辛烷、甲苯）混合比、加水蒸汽量抑制碳烟生成物理化学本质原因；结合定量测量、新模型模拟及理论分析，阐明水蒸汽对油气火焰碳烟生成的抑制机制，为油气地面工程燃烧污染物控制及新装备研发奠定理论基础。

With the acceleration of national oil and gas production and green environmental protection strategy, the environmental and ecological pressures caused by combustion emissions and the soot particulate matter of oil and gas surface engineering are becoming increasingly prominent. Scientific understanding of the mechanism of soot nucleation, growth, oxidation and the influence of steam on soot formation is a key problem in the development of new technologies for reducing soot emissions from oil and gas combustion. For this purpose, this project will systematically study the oil and gas surrogate fuel/steam diffusion flame. Laser-induced incandescence/fluorescence (LII/LIF), emission spectroscopy (CT) and transmission electron microscopy (TEM) and other advanced diagnosis technique will be used to measure accurately the concentrations of soot and precursors, soot particle temperature, size and morphology. Secondly, the analyses of sensitivity and reaction pathway will be used to theoretically investigate how the addition of steam to oil&gas affects the soot formation，and a more accurate and general soot model will be developed. Based on the above researches, the thermal accommodation coefficient of soot particle will be optimized. At the same time, the 2D-Flame code wll be optimized and used to calculate these parameters, such as temperature, concentration, nuclear rate, growth rate, oxidation rate and number density for soot formation. The main physical and chemical factors, such as which fraction (C1-C3 alkanes, n-heptane, isooctane, toluene), the blending ratio, and fuel chemistry affecting the soot formation, will be revealed. Finally, based on disscussion the results of quantitative measurements and numerical simulation using the new model, the suppression mechanism of steam addition on soot formation for oil&gas flame is clarified.This study provides theoretical foundation for pollutant control and new equipment development in oil and gas surface engineering.