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

Bing Liu, Zuohua Huang, Ke Zeng, Hao Chen, Xibin Wang, Haiyan Miao, Deming Jiang

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

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), NOx, 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 NOx concentration increases with the increase of hydrogen fraction, and NOx 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 NOx.

Original languageEnglish
Pages (from-to)273-277
Number of pages5
JournalEnergy and Fuels
Volume22
Issue number1
Early online date12 Dec 2007
DOIs
Publication statusPublished - 1 Jan 2008
Externally publishedYes

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