Comprehensive Review on Effects of Exhaust Gas Recirculation on Nitrogen Oxide Emission in Various Biodiesel and Nano Additives Blends Fueled Compression Ignition Engine

The premixed flame speed under a small four stock homogeneous charge compression ignition engine, fueled with dimethyl ether, was investigated. The effects of intermediate species, initial temperature, initial pressure, exhaust gas recirculation, and equivalence ratio were studied and compared to the baseline condition. Results show that, under all conditions, the flame speeds calculated without intermediates are higher than those which took the intermediates in consideration. Flame speeds increase with the increase of crank angle. The increase rate is divided into three regions and the increase rate is obviously high in the event of low temperature heat release. Initial temperature and pressure only affect the crank angle of flame speed, but have little influence on its value. Equivalence ratio and exhaust gas recirculation ratio do not only distinctly decrease the flame speed, but also advance the crank angle of flame speed.

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Technical Note: Investigation on emission characteristics of a compression ignition engine with oxygenated fuels and exhaust gas recirculation

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering ◽

10.1243/0954407001527790 ◽

2000 ◽

Vol 214 (5) ◽

pp. 503-508 ◽

Cited By ~ 32

Author(s):

H. W. Wang ◽

Z. H. Huang ◽

L. B. Zhou ◽

D. M. Jiang ◽

Z. L. Yang

Keyword(s):

Linear Relationship ◽

Reduction Rate ◽

Exhaust Gas Recirculation ◽

Emission Characteristics ◽

Exhaust Gas ◽

Compression Ignition ◽

Mass Percentage ◽

Compression Ignition Engine ◽

Brake Mean Effective Pressure ◽

Gas Recirculation

Investigations of emission characteristics were carried out on a compression ignition, dimethyl ether engine (DME) with exhaust gas recirculation (EGR) and on a diesel engine with a dimethyl carbonate (DMC) additive. The experimental results show that the DME engine with EGR can simultaneously reduce smoke and NOx emissions. The NOx can be reduced by about 20 per cent for every 10 per cent of EGR introduction, while smoke remains at zero. The diesel equivalent brake specific fuel consumption (b.s.f.c.) shows a slight decrease when DMC is added, while the effective thermal efficiency shows a slight improvement. It is found that the smoke reduction rate and smoke show a linear relationship with DMC percentage or oxygen mass percentage in the diesel fuel. For the specific brake mean effective pressure (b.m.e.p.), smoke will be reduced by 20 per cent for every 10 per cent DMC added and by 40 per cent when the oxygen mass percentage in the fuel reaches 10 per cent. The CO decreases when DMC is added, while NOx shows an increase. This difference is pronounced at a high b.m.e.p. For the specific b.m.e.p., CO and NOx show a linear relationship with DMC mass percentage in the fuel; CO will be reduced by 20 per cent while NOx will be increased by 20 per cent for every 10 per cent DMC added.

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Emission Characteristics under Diesel and Biodiesel Fueled Compression Ignition Engine with Various Injector Holes and EGR Conditions

Energies ◽

10.3390/en13112973 ◽

2020 ◽

Vol 13 (11) ◽

pp. 2973

Author(s):

Taejung Kim ◽

Jungsoo Park ◽

Honghyun Cho

Keyword(s):

Diesel Engine ◽

Environmental Pollutants ◽

Exhaust Gas Recirculation ◽

Emission Characteristics ◽

Exhaust Gas ◽

Compression Ignition ◽

Fuel Type ◽

Compression Ignition Engine ◽

Conventional Rail ◽

Gas Recirculation

The combustion performance of a conventional rail diesel engine was investigated by measuring the exhaust gas with the respect to the number of injector holes, fuel type, and the use of exhaust gas recirculation (EGR), to provide a detailed reduction of environmental pollutants. It was found that a six- or seven-hole injector was more effective than a five-hole injector for reducing the exhaust gas. In addition, the mixing of 20% biodiesel oil with diesel most effectively reduced the HC and NOx contents. The technology generally reduced the NOx and CO contents of the exhaust, but had no significant effect on the HC and CO2 contents.

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