中文摘要：

在一台改装的单缸柴油机上进行了模拟沼气掺氢燃烧的试验。模拟沼气由天然气含量为50％～80％，CO2含量为20％～50％组成，掺烧氢气的比例为10％～40％。结果表明，随着模拟沼气中CO2比例的增加，发动机动力性降低，排放污染物中CO和NOx排放减少，但HC排放增加。适当增加模拟沼气发动机的掺氢比例，发动机缸内最高压力和最大转矩升高，过多的掺氢比例会降低发动机的动力性。排放污染物中随着掺氢比例的增加，CO排放增多，HC排放减少，NOx排放量与模拟沼气中CO2的比例有关。

英文摘要：

Experiment of simulated biogas blended with hydrogen in a modified single-cylinder diesel engine is studied. The components of simulated biogas contain natural gas and CO2 , the natural gas content is from 50% to 80%, CO2 content is from 20% to 50%, and the hydrogen blending ratio is from 10% to 40%. Experimental results show that with the increase of CO2 proportion, the engine power, CO and NOx emissions are decreased, but HC emissions is increased. When properly increases hydrogen blending ratio, the maximum cylinder pressure and engine torque are increased. However, large hydrogen blending ratio will decrease engine power. When hydrogen blending ratio is increased, CO emission is increased while HC emission is decreased. NOx emission is related to CO2 proportion of simulated biogas.