Comparative study on the calculation of nitrogen oxide emissions

Author(s):  
V.-F Staviri ◽  
G. Eduard
2003 ◽  
Vol 13 (4) ◽  
pp. 897-910 ◽  
Author(s):  
Roberta E. Martin ◽  
Gregory P. Asner ◽  
R. James Ansley ◽  
Arvin R. Mosier

Pollution ◽  
1973 ◽  
pp. 278-287 ◽  
Author(s):  
H. G. Rigo ◽  
W. J. Mikucki ◽  
M. L. Davis

2008 ◽  
Vol 2008 ◽  
pp. 1-13 ◽  
Author(s):  
U. Wagner ◽  
P. Eckert ◽  
U. Spicher

Up to now, diesel engines with direct fuel injection are the propulsion systems with the highest efficiency for mobile applications. Future targets in reducingCO2-emissions with regard to global warming effects can be met with the help of these engines. A major disadvantage of diesel engines is the high soot and nitrogen oxide emissions which cannot be reduced completely with only engine measures today. The present paper describes two different possibilities for the simultaneous in-cylinder reduction of soot and nitrogen oxide emissions. One possibility is the optimization of the injection process with a new injection strategy the other one is the use of water diesel emulsions with the conventional injection system. The new injection strategy for this experimental part of the study overcomes the problem of increased soot emissions with pilot injection by separating the injections spatially and therefore on the one hand reduces the soot formation during the early stages of the combustion and on the other hand increases the soot oxidation later during the combustion. Another method to reduce the emissions is the introduction of water into the combustion chamber. Emulsions of water and fuel offer the potential to simultaneously reduceNOxand soot emissions while maintaining a high-thermal efficiency. This article presents a theoretical investigation of the use of fuel-water emulsions in DI-Diesel engines. The numerical simulations are carried out with the 3D-CFD code KIVA3V. The use of different water diesel emulsions is investigated and assessed with the numerical model.


Fuel ◽  
2017 ◽  
Vol 188 ◽  
pp. 310-323 ◽  
Author(s):  
Xiaohan Ren ◽  
Rui Sun ◽  
Xiaoxiao Meng ◽  
Nikita Vorobiev ◽  
Martin Schiemann ◽  
...  

Author(s):  
I.Ya. Sigal ◽  
A.V. Smikhula ◽  
O.I. Sigal

In the article discusses the features of constructive solutions accepted in the burner devices and chambers of boiler units, which were used both when converting solid fuel boilers to natural gas, and creating new designs of gas boiler units. The works to reduce nitrogen oxide emissions at the Gas Institute of the National Academy of Sciences of Ukraine began in the 1960s and by 1971 significant results had been achieved was shown. The main methods and technical solutions that are used to reduce emissions of nitrogen oxides during the combustion of natural gas in boilers of various capacities, including 300 MW power units, are considered. The principal design of a two-stage burner, which are operated in an amount of more than 2000 units in Ukraine and the CIS countries is presented. The installed two-stage burner devices for combustion of natural gas require immediate reconstruction with bringing their indicators to the calculated ones at the first stage. The modernization of the exist ing two-stage burners is possible to achieve the readings of the EU emissions directive 2010/75/EU was shown. The most promising technologies for further reducing the level of nitrogen oxide emissions less than 100 mg/Nm3 (3% O2, dry gases) when burning natural gas were shown. Bibl. 38, Fig.4, Tab. 1.


Author(s):  
W. BARTOK ◽  
A.R. CRAWFORD ◽  
A.R. CUNNINGHAM ◽  
H.J. HALL ◽  
E.H. MANNY ◽  
...  

2019 ◽  
Vol 202 ◽  
pp. 128-141
Author(s):  
Jan Alexander Arndt ◽  
Armin Aulinger ◽  
Volker Matthias

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