Abstract
An experimental study on the performance and emissions of a spark ignition engine operating on the natural gas-hydrogen mixtures was conducted. The results show that the engine lean-burn limit is extended by the addition of hydrogen into natural gas. For a specific excessive air ratio, engine power output and thermal efficiency decrease with the increase of hydrogen fraction in natural gas when the hydrogen fraction is less than a certain value (20%) whereas engine power output and thermal efficiency increase with further increasing hydrogen fraction when hydrogen fraction is larger than a certain value (20%). Addition of hydrogen into natural gas decreases the exhaust hydrocarbon (HC) concentrations. However, addition of hydrogen into natural gas will increase NOx concentration. Thus, an engine operating on lean-burn natural gas-hydrogen combustion is favorable for getting higher thermal efficiency and lower emissions.
| Original language | English |
|---|---|
| Pages (from-to) | 2131-2136 |
| Number of pages | 6 |
| Journal | Energy and Fuels |
| Volume | 20 |
| Issue number | 5 |
| Early online date | 31 Aug 2006 |
| DOIs | |
| Publication status | Published - 1 Sep 2006 |
| Externally published | Yes |