Experimental Study on Emissions of a Spark-Ignition Engine Fueled with Natural Gas−Hydrogen Blends

详细信息    查看全文

• 作者：Bing Liu ; Zuohua Huang ; Ke Zeng ; Hao Chen ; Xibin Wang ; Haiyan Miao ; Deming Jiang
• 刊名：Energy & Fuels
• 出版年：2008
• 出版时间：January 2008
• 年：2008
• 卷：22
• 期：1
• 页码：273 - 277
• 全文大小：143K
• 年卷期：v.22,no.1(January 2008)
• ISSN：1520-5029

文摘

An experimental investigation on the influence of the excess air ratio and hydrogen fraction on the emissions characteristics of a spark-ignition engine fueled with natural gas−hydrogen blends was conducted. The results indicate that the excess air ratio has a significant effect on the hydrocarbon (HC), NO_x, CO, and CO₂ concentration for both pure natural gas and natural gas−hydrogen blends. For a specified excess air ratio, HC emissions decrease with the increase of hydrogen fraction; the behavior is more obvious under the lean burn operation. The NO_x concentration increases with the increase of hydrogen fraction, and NO_x gets its peak value at an excess air ratio of 1.1. CO₂ emissions decrease with increasing hydrogen fraction. Meanwhile, the addition of hydrogen into natural gas can extend the lean burn limit of a mixture. Thus, an engine fueled with natural gas−hydrogen blends operating under lean mixture conditions can get low emissions of HC, CO, CO₂, and NO_x.