A study on the combustion and emission performance of diesel engines under different proportions of O-2 & N-2 & CO2

作者：Tan, Qinming^*; Hu, Yihuai

来源：Applied Thermal Engineering, 2016, 108: 508-515.

DOI：10.1016/j.applthermaleng.2016.07.151

• Diesel engine
• Oxygen-enriched
• Carbon dioxide
• Nitrogen-free
• Combustion
• Emissions

This paper is aimed to identify the emissions from diesel engines which combust with different volume proportions of oxygen (O-2), nitrogen (N-2) and carbon dioxide (CO2) in the suction gas. The results revealed that: nitrogen oxides (NOx) emissions increased with the N-2 volume concentration from 79% to 40%, when the engine works at 600 rpm with O-2 & N-2, there are some sparks in the exhaust pipe when N-2 concentration is less than 37%. On the other hand, CO2 can significantly reduce the NOx emissions of the engine with high O-2 concentration combustion while the N-2 contention is between 50% and 79%. The minimum total emissions can be achieved at 22% O-2 and 0-2% CO2. From the above intake conditions, it is difficult to meet the requirements of emission and surmount the bottleneck of NOx-SOOT emission, regardless whatever the ratio of O-2 and CO2 is. At last, the engine runs at 600 rpm steadily and properly, with 50% O-2 and 50% CO2, to achieve diesel combustion without NOx emissions, successfully shifting the problem of NOx-SOOT emission bottleneck to how to optimize the engine's combustion performance with nitrogen-free (only O-2 & CO2).

• 出版日期2016-9-5
• 单位上海海事大学