Effect of nitric oxide and exhaust gases on gasoline surrogate autoignition: iso-octane experiments and modeling

2022 ◽  
Vol 236 ◽  
pp. 111807
Author(s):  
Ruozhou Fang ◽  
Chiara Saggese ◽  
Scott W. Wagnon ◽  
Amrit B. Sahu ◽  
Henry J. Curran ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Exhaust Gases

The Selective Non-Catalytic Removal (SNCR) of Nitric Oxides From Engine Exhaust Streams: Comparison of Three Processes

2004 ◽  
Vol 126 (2) ◽  
pp. 234-240 ◽  
Author(s):  
Jerald A. Caton ◽  
Zhiyong Xia
Keyword(s):  
Nitric Oxide ◽  
Oxygen Concentration ◽  
Cyanuric Acid ◽  
Operating Conditions ◽  
High Oxygen ◽  
Chemical Agent ◽  
Nitric Oxides ◽  
Engine Exhaust ◽  
Exhaust Gases ◽  
Catalytic Removal

Three processes for the selective non-catalytic removal (SNCR) of nitric oxides from engine exhaust gases are compared. The three processes are similar but each uses a different chemical agent: ammonia, urea, or cyanuric acid. A number of operating conditions have been studied. In particular, results for the removal of nitric oxide are significantly different for the three processes as the oxygen concentration varies. Ammonia, urea, and cyanuric acid were found to be most effective at low, intermediate, and high oxygen concentrations, respectively. The implications of these results for a range of engines and engine applications are discussed.

Determination of Pollutant Emissions in Car Exhaust Gases

1976 ◽  
Vol 9 (6) ◽  
pp. 221-225
Author(s):  
E. Grimm ◽  
A. Emling ◽  
D. Richardson
Keyword(s):  
Nitric Oxide ◽  
Carbon Monoxide ◽  
Living Conditions ◽  
Pollutant Emissions ◽  
Industrial Areas ◽  
Exhaust Gases ◽  
Car Exhaust

The ever increasing density of industrial areas and the corresponding increase of petrol driven engines emitting harmful elements such as carbon monoxide, hydrocarbons and nitric oxide in the exhaust make it necessary to substantially reduce these toxic levels to create better living conditions. Measures applied in various countries to limit these pollutions are discussed and the operating principles and design of analysers are detailed.

scholarly journals Effect of Operating Conditions on Pollutants Concentration Emitted from a Spark Ignition Engine Fueled with Gasoline Bioethanol Blends

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Haroun A. K. Shahad ◽  
Saad K. Wabdan
Keyword(s):  
Nitric Oxide ◽  
Carbon Dioxide ◽  
Experimental Investigation ◽  
Spark Ignition ◽  
Operating Conditions ◽  
Spark Ignition Engine ◽  
Variable Speed ◽  
Exhaust Gases ◽  
Speed Increase ◽  
Energy Replacement

This study is an experimental investigation of the effect of bioethanol gasoline blending on exhaust emissions in terms of carbon dioxide CO2, carbon monoxide CO, unburnt hydrocarbons UHC, and nitric oxide NOxof a spark ignition engine. Tests are conducted at controlled throttle and variable speed condition over the range of 1200 to 2000 rpm with intervals 400 rpm. Different compression ratios are tested for each speed, namely (7,8,10, and 11). Pure gasoline and bioethanol gasoline blends are used. The bioethanol used is produced from Iraqi date crop (Zehdi). Blending is done on energy replacement bases. Ethanol energy ratio (EER) used is 5%, 10%, and 15%. At each of the three designated engine speeds, the torque is set as 0, 3, 7, 10, and 14 N·m. It is found that ethanol blending reduces CO and UHC concentration in the exhaust gases by about 45% and 40.15%, respectively, and increases NOxand CO2concentrations in the exhaust gases by about 16.18% and 7.5%, respectively. It is found also that load and speed increase causes an increase in CO2and NOxconcentrations and reduces CO and UHC concentrations. It is also found that increasing the compression ratio causes the emissions of CO2and NOxto decrease and those of CO and UHC to increase.

scholarly journals Numerical modelling of combustion in SI engine fuelled with methane

2009 ◽  
Vol 139 (4) ◽  
pp. 45-54
Author(s):  
Arkadiusz KOCISZEWSKI
Keyword(s):  
Nitric Oxide ◽  
Carbon Dioxide ◽  
Numerical Analysis ◽  
Numerical Modelling ◽  
Si Engine ◽  
Exhaust Gases ◽  
Spark Plug ◽  
Paper Work ◽  
Lean Mixtures ◽  
Excess Number

Results of numerical analysis of methane and gasoline combustion in multipoint ignition SI engine are presented in the paper. Work parameters of engine fuelled with methane lean mixtures of λ = 1.45 and 1.8 for three configurations of spark plugs (one, two and four active spark plugs) are compared. These configurations were chosen taking into consideration earlier research concerning numerical modelling and experiments. The results of carried out analysis proved that using two spark plugs at air excess number λ = 1.8 caused that engine work parameters are similar to case of mixtures of λ = 1.45 with one spark plug configuration. Simultaneously, the emission of nitric oxide was decreased more than eight times and the concentration of carbon dioxide in exhaust gases was 20% lower.

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