中文摘要：

在一台火花点火发动机上,分别进行了生物质燃气中可燃组分CH4、CO和H2的燃烧试验,研究并对比了各组分气体的燃烧及排放特性。结果表明,H2燃烧快,热效率高,NOx排放水平较低;CH4和CO相比具有较高的热效率和较低的NOx排放水平,但其稀燃能力较弱;在实际生物质燃气中可以通过提高H2的含量来扩展稀燃极限以及提高热效率。

英文摘要：

Combustion experiments of CH4 , H2 and CO were carried out in a spark-ignition engine under 1 500 r/min engine speed, and the combustion and emission characteristics were analyzed. The results showed that H2 had the fastest burning velocity, the highest thermal efficiency and the lowest NO, emission. Comparing with CO, CH4 had higher thermal efficiency, lower NOx emission and poorer lean burn ability. In practical application, it had potential to improve lean burn limit and thermal efficiency of biogas by mixing with H2.