scholarly journals Issues on Nitrogen Oxides Concentration Reduction in the Combustion Products of Natural Gas

2015 ◽  
Vol 113 ◽  
pp. 287-291 ◽  
Author(s):  
V.V. Shalaj ◽  
A.G. Mikhailov ◽  
E.N. Slobodina ◽  
S.V. Terebilov
Keyword(s):  
Natural Gas ◽  
Nitrogen Oxides ◽  
Combustion Products

scholarly journals REDUCTION OF NITROGEN OXIDES EFFLUENTS WITHIN AN OPEN FLAME BY INPUT THE WATER VAPOUR INTO COMBUSTION AIR FLOW

2018 ◽  
pp. 57-70
Author(s):  
B.S. Soroka ◽  
A.V. Kornienko ◽  
V.S. Kudryavtsev ◽  
R.S. Karabchievskaya
Keyword(s):  
Natural Gas ◽  
Nitrogen Oxides ◽  
Water Vapour ◽  
Combustion Products ◽  
Nox Formation ◽  
Mixture Ratio ◽  
Open Flame ◽  
Environmental Consequences ◽  
Working Medium ◽  
Experimental Researches

The state-of-the art the problem concerning reduction the NOx formation by humidification the combustion air is briefly consideredan, alized and discussed. The proper technologies of combustion the wet inflammable mixtures are considered for the cases of using the water vapour pump (WVP), Maisotsenko cycle (M-cycle) and suitable facilities along with the cases of operation the combined systems with heat recovery due transfer the water vapour energy to working medium (combustion products). Both environmental and power advantages of the systems of «wet combustion» have been demonstrated accordingly data collected in some earlier researches. The results of experimental researches of burning process under conditions of input the water vapour into the gas–air mixture to be supplied for combustion are presented in the paper in frame of consideration the results of own authors’ tests. Given information concerning the investigation of environmental consequences of impact the water vapour within the inflammable mixture on nitrogen oxides NOx value in combustion products ([NOx] concentration) has been generalized. The techniques of experimental researches, the design of firing rig and instrumentation, used in the tests have been described. The distinction of ignition the natural gas-air mixture and of stable flame maintenance for case of free vertical flame operation have been evaluated in dependence on inflammable mixture’s composition along with studying of impact a moisture content — H2O concentration in initial gas-air mixture. Comparative evaluations of NO value within an open flame in dependence on temperature and on composition of initial natural gas — air mixture (ratio «air : gas») have been carried out. An opportunity of two-times reduction of maximum NOmax concentration within a flame by initial gas-air mixture enrichment with water vapour has been proven. Bibl. 23, Fig.10, Tab.1.

scholarly journals FEATURES OF THE INFLUENCE OF RECIRCULATION OF COMBUSTION PRODUCTS ON THE FORMATION OF NITROGEN OXIDES IN BOILERS DURING BURNING NATURAL GAS

2018 ◽  
pp. 62-68 ◽  
Author(s):  
I.Ya. Sigal ◽  
A.V. Smikhula ◽  
O.I. Sigal ◽  
O.V. Marasin ◽  
E.S. Kernazhytska
Keyword(s):  
Natural Gas ◽  
Nitrogen Oxides ◽  
Combustion Zone ◽  
Combustion Products ◽  
Maximum Temperature ◽  
Entire Volume ◽  
Exhaust Gases ◽  
Additional Amount ◽  
Thermal Nox ◽  
The One

During the combustion of natural gas and the supply of exhaust gases recirculation like a ballast was shown. It is necessary to take into account that they contain nitrogen oxides, mainly in the form of NO, which does not decompose in the combustion zone, but is added to nitrogen oxides that has been produced during burning of fuel. The combustion products are affordable, but not ideal ballast. As on the one side, they reduce the maximum temperature in the combustion zone and the concentration of reagents, i.e. reduces the formation of «thermal» NOx, on the other side, they add to the combustion zone an additional amount of nitric oxide, which is summed up with that has been formed during burning in the combustion chamber and also reducing the efficiency of the method. When the maximum temperature in the combustion zone is the highest and the entire volume of fuel and ballast before to the combustion is best mixed during recirculation of exhaust gases, their effect on the formation of nitrogen oxides is the highest. The most effective ballast that reduces the formation of NO during combustion is carbon dioxide, provided it is well pre-molecularly mixed with natural gas before to the combustiontion zone. Bibl. 16, Tab. 4, Fig. 2.

EFFECT OF AIR HEATING ON CONCENTRATION OF NITROGEN OXIDES IN COMBUSTION PRODUCTS OF GASEOUS FUELS

2020 ◽  
Vol 0 (10) ◽  
pp. 35-40
Author(s):  
S.I. Gertsyk ◽  
◽  
I.V. Belyakov ◽  
Keyword(s):  
Blast Furnace ◽  
High Temperature ◽  
Nitrogen Oxides ◽  
Combustion Products ◽  
Blast Furnaces ◽  
Natural Gases ◽  
Gaseous Fuels ◽  
Air Heating ◽  
Formation Probability ◽  
Oxide Concentration

The formation probability of nitrogen oxides in combustion products of mixed blast-furnace and natural gases under different conditions of combustion was calculated. It has been found out that heating the air incoming into burners of high-temperature blast-furnaces sharply increases concentration of nitrogen oxides in combustion products (by 1.5-1.75 times). It was notices that in furnaces where temperature was less than 950-1000 °С, heating the air up to 400 °С increased NOx content in gases released to the atmosphere no more than by 20-23%, and oxide concentration was in limits of sanitary standards.

scholarly journals EXPERIENCE OF THE DEVELOPMENT OF BURNERS, CHAMBERS, AND TECHNOLOGIES FOR REDUCING EMISSIONS OF NITROGEN OXIDES BY BOILERS DURING THE COMBUSTION OF NATURAL GAS

2019 ◽  
pp. 70-79
Author(s):  
I.Ya. Sigal ◽  
A.V. Smikhula ◽  
O.I. Sigal
Keyword(s):  
Natural Gas ◽  
Nitrogen Oxides ◽  
Nitrogen Oxide ◽  
National Academy Of Sciences ◽  
Nitrogen Oxide Emissions ◽  
Two Stage ◽  
Immediate Reconstruction ◽  
Boiler Units ◽  
Reduce Emissions ◽  
The 1960S

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.

Graph-Analytical Estimation Method of Natural Ventilation Efficiency during Natural Gas Combustion

2018 ◽  
Vol 931 ◽  
pp. 901-904 ◽  
Author(s):  
Victor I. Chebotarev ◽  
Anastasia P. Pirozhnikova ◽  
Alla V. Koroleva
Keyword(s):  
Natural Gas ◽  
Natural Ventilation ◽  
Theoretical Calculations ◽  
Residential Buildings ◽  
Experimental Studies ◽  
Estimation Method ◽  
Combustion Products ◽  
Gas Combustion ◽  
Analytical Estimation ◽  
Ventilation Duct

Open burning of natural gas when using gas equipment in the premises of residential buildings is considered, taking into account the formation of combustion products, depending on the coefficients of excess air. Theoretical and experimental studies of combustion processes are presented. To determine the aerodynamic process in the ventilation duct, theoretical calculations of the dependence of the discharge at the entrance to the ventilation duct from the outside temperature of the atmospheric air were made. Graph-analytic method of evaluating the effectiveness of natural ventilation is carried out.

Removal of nitrogen oxides by catalytic reduction with natural gas

1993 ◽  
Vol 29 (10) ◽  
pp. 507-509
Author(s):  
A. F. Lunin ◽  
A. Yu. Adzhiev ◽  
T. N. Burdeinaya ◽  
R. I. Fedorova ◽  
A. Yu. Plastinin
Keyword(s):  
Natural Gas ◽  
Nitrogen Oxides ◽  
Catalytic Reduction

IGR Solid-State Electrochemical NOx Control for Natural Gas Combustion Exhaust Gases

1989 ◽  
Vol 111 (3) ◽  
pp. 394-397 ◽  
Author(s):  
M. S. Hossain ◽  
M. Neyman ◽  
W. J. Cook ◽  
A. Z. Gordon
Keyword(s):  
Solid State ◽  
Natural Gas ◽  
High Surface ◽  
Nox Reduction ◽  
High Surface Area ◽  
Combustion Products ◽  
Gas Combustion ◽  
Electrochemical Technology ◽  
Natural Gas Combustion ◽  
Nox Control

Solid-state electrochemical technology, embodied in the IGR process, is used to reduce nitrogen oxides (NOx) to nitrogen and oxygen, and thereby control NOx emissions from natural gas powered engines. The IGR deNOx process is based on solid-state, flow-through, high surface area, porous oxygen ion conductive ceramic electrolytes. Recent bench-scale experiments conducted for the Gas Research Institute have demonstrated NOx reduction in multicomponent gas streams, the inert portion of which simulate natural gas combustion products. The reduction products were analyzed by in situ gas chromatography to verify NOx reduction rates inferred from electrochemical measurements. IGR process advantages compared with existing NOx control technologies are reviewed.

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