scholarly journals Development of the next generation medium-duty natural gas engine

2000 ◽  
Author(s):  
D J Podnar ◽  
J T Kubesh
Keyword(s):  
Natural Gas ◽  
Next Generation ◽  
Gas Engine ◽  
Natural Gas Engine

Measured and Predicted Performance of a Downsized, Medium Duty, Natural Gas Engine

2017 ◽  
Author(s):  
Robert Draper ◽  
Brendan Lenski ◽  
Franz-Joseph Foltz ◽  
Roderick Beazley ◽  
William Tenny
Keyword(s):  
Natural Gas ◽  
Gas Engine ◽  
Natural Gas Engine

Impact of ignition energy on the combustion performance of an SI heavy-duty stoichiometric operation natural gas engine

Fuel ◽  
2022 ◽  
Vol 313 ◽  
pp. 122857
Author(s):  
Zhongshu Wang ◽  
Xing Su ◽  
Xiaoyan Wang ◽  
Demin Jia ◽  
Dan Wang ◽  
...  
Keyword(s):  
Natural Gas ◽  
Ignition Energy ◽  
Heavy Duty ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Combustion Performance

scholarly journals Comparison of primary and secondary particle formation from natural gas engine exhaust and of their volatility characteristics

2017 ◽  
Vol 17 (14) ◽  
pp. 8739-8755 ◽  
Author(s):  
Jenni Alanen ◽  
Pauli Simonen ◽  
Sanna Saarikoski ◽  
Hilkka Timonen ◽  
Oskari Kangasniemi ◽  
...  
Keyword(s):  
Air Quality ◽  
Natural Gas ◽  
Particulate Emissions ◽  
Engine Exhaust ◽  
Gas Engine ◽  
Secondary Aerosol ◽  
Formation Potential ◽  
Natural Gas Engine ◽  
Evaporation Temperature ◽  
Catalyst Temperature

Abstract. Natural gas usage in the traffic and energy production sectors is a growing trend worldwide; thus, an assessment of its effects on air quality, human health and climate is required. Engine exhaust is a source of primary particulate emissions and secondary aerosol precursors, which both contribute to air quality and can cause adverse health effects. Technologies, such as cleaner engines or fuels, that produce less primary and secondary aerosols could potentially significantly decrease atmospheric particle concentrations and their adverse effects. In this study, we used a potential aerosol mass (PAM) chamber to investigate the secondary aerosol formation potential of natural gas engine exhaust. The PAM chamber was used with a constant UV-light voltage, which resulted in relatively long equivalent atmospheric ages of 11 days at most. The studied retro-fitted natural gas engine exhaust was observed to form secondary aerosol. The mass of the total aged particles, i.e., particle mass measured downstream of the PAM chamber, was 6–268 times as high as the mass of the emitted primary exhaust particles. The secondary organic aerosol (SOA) formation potential was measured to be 9–20 mg kgfuel−1. The total aged particles mainly consisted of organic matter, nitrate, sulfate and ammonium, with the fractions depending on exhaust after-treatment and the engine parameters used. Also, the volatility, composition and concentration of the total aged particles were found to depend on the engine operating mode, catalyst temperature and catalyst type. For example, a high catalyst temperature promoted the formation of sulfate particles, whereas a low catalyst temperature promoted nitrate formation. However, in particular, the concentration of nitrate needed a long time to stabilize – more than half an hour – which complicated the conclusions but also indicates the sensitivity of nitrate measurements on experimental parameters such as emission source and system temperatures. Sulfate was measured to have the highest evaporation temperature, and nitrate had the lowest. The evaporation temperature of ammonium depended on the fractions of nitrate and sulfate in the particles. The average volatility of the total aged particles was measured to be lower than that of primary particles, indicating better stability of the aged natural gas engine-emitted aerosol in the atmosphere. According to the results of this study, the exhaust of a natural gas engine equipped with a catalyst forms secondary aerosol when the atmospheric ages in a PAM chamber are several days long. The secondary aerosol matter has different physical characteristics from those of primary particulate emissions.

Natural Gas Engine Oil Development

1991 ◽  
Author(s):  
Mónica Graciela Vázquez ◽  
Patricia Errecalde ◽  
Sergio Fabián Seín ◽  
Daniel Gonzalez
Keyword(s):  
Natural Gas ◽  
Engine Oil ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Oil Development
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