A simplified simulation of the reaction mechanism of NO<i><sub>x</sub></i> formation and non-catalytic reduction

Machač, Pavel; Baraj, Erlisa

doi:10.1080/00102202.2017.1418335

Cited by 5 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…pulverized coal combustion, Zeldovich and Fenimore mechanisms are more dominant, while fuel-N oxidation dominates in fluidized beds. The fuel-N mechanism is only weakly dependent on the combustion temperature, and there is a proportional correlation with oxygen stoichiometry [5][6][7][8]. In addition to NO and NO 2 , a significant nitrous oxide production (N 2 O) can also be observed.…”

Section: Formation Of No X Emissionsmentioning

confidence: 99%

See 1 more Smart Citation

Applicability of Secondary Denitrification Measures on a Fluidized Bed Boiler

et al. 2022

View full text Add to dashboard Cite

This article compares performance of selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) applied on the same pilot unit, a 500 kW fluidized bed boiler burning Czech lignite. Correlation of the denitrification efficiency on the normalized stoichiometric ratio (NSR) is investigated. The fundamental principle of the SCR and SNCR is similar with the same reaction scheme. The difference is in the use of the catalyst that lowers the activation energy of the key reaction. As a result, the reduction is performed in the SCR method at lower temperatures. During experiments, the NSR was up to 1.6 for the SCR method. For the SNCR method, which has a higher reducing agent consumption, maximum denitrification efficiency was reached for NSR about 2.5. The efficiency of both secondary methods was investigated. The denitrification efficiency during experiments exceeded 98 % for the SCR method, and the SNCR method, together with the primary measures, reached an efficiency of 58 %.

show abstract

Section: Formation Of No X Emissionsmentioning

confidence: 99%

“…The optimum temperature for the reaction also varies depending on the reducing agent used. For example, for ammonia, it is in the range of 850-1000 • C, and for urea, between 950-1100 • C [4][5][6]17].…”

Section: Sncrmentioning

confidence: 99%

Applicability of Secondary Denitrification Measures on a Fluidized Bed Boiler

et al. 2022

View full text Add to dashboard Cite

show abstract

“…As a major atmospheric pollutant and greenhouse gas, NO can cause acid rain, photochemical smog and ozone layer depletion, and increases the probability of respiratory diseases, which not only pollutes the environment but also causes a potential threat to human health. [1][2][3][4][5][6] Traditional flue gas denitration technology [7][8][9] has the problems of deactivation of the catalyst, corrosion of equipment and the consumption of valuable ammonia (NH 3 ) to convert NO into worthless N 2 . NH 3 is an important chemical used in many applications, such as fertilizers, nitric acid, explosives, and as a high-energy-density energy storage material for fuel cells.…”

Section: Introductionmentioning

confidence: 99%

NH₃ production from absorbed NO with synergistic catalysis of Pd/C and functionalized ionic liquids

Zhang

Wang

et al. 2023

Green Chem.

View full text Add to dashboard Cite

show abstract

“…Therefore, the SOOT-NOx emission bottleneck has become the key to restrict the development of combustion and emission technologies of diesel engines [21,22]. The O 2 and N 2 concentration in the combustion environment is of great significance for the production of NOx [23,24]. This paper aims to find new solutions to optimize diesel emissions through basic studies on diesel low-nitrogen or nitrogen-free combustion.…”

Section: Introductionmentioning

confidence: 99%

Study on Diesel Low-Nitrogen or Nitrogen-Free Combustion Performance in Constant Volume Combustion Vessels and Contributory

Tan

2021

Atmosphere

View full text Add to dashboard Cite

This paper studies the combustion performance of diesel in constant volume combustion vessels under different conditions of mixed low-nitrogen (O2 and N2) or non-nitrogen (O2 and CO2) in varying proportions. The high-speed camera is used to shoot the combustion flame in the constant volume combustion vessel. The process and morphology of the combustion flame are amplified in both time and space to study and analyze the effects of different compositions and concentrations in gases on the combustion performance of diesel and conduct a study on the contributory factors in the performance of diesel with no nitrogen. According to the study, in the condition of low nitrogen, the O2 concentration is more than 60%, the ignition delay period is shortened, the combustion flame is bright and slender, it spreads quickly, and the blue flame appears when the O2 concentration reaches 70%; While for nitrogen-free combustion, only when the O2 concentration reaches 30% is the combustion close to the air condition; when the O2 concentration reaches 40%, the combustion condition is optimized obviously and the combustion flame is relatively slender compared to the air working condition. Similarly, with the increase of the O2 concentration, the ignition delay period of nitrogen-free diesel is shortened, the duration is extended, and the combustion performance is optimized. In addition, when the O2 concentration reaches 50%, with the decrease of the initial temperature, the ignition delay period is prolonged, and the duration is shortened obviously. When the temperature is lower than 700 K, there is no ignition. The increase of the diesel injection pressure is beneficial to optimize the ignition performance of diesel non-nitrogen combustion and shorten its ignition delay period and combustion duration. Related research has important guiding significance to optimize nitrogen-free combustion technology, which produces no NOx of the diesel engine.

show abstract

A simplified simulation of the reaction mechanism of NO_x formation and non-catalytic reduction

Cited by 5 publications

References 33 publications

Applicability of Secondary Denitrification Measures on a Fluidized Bed Boiler

Applicability of Secondary Denitrification Measures on a Fluidized Bed Boiler

NH₃ production from absorbed NO with synergistic catalysis of Pd/C and functionalized ionic liquids

Study on Diesel Low-Nitrogen or Nitrogen-Free Combustion Performance in Constant Volume Combustion Vessels and Contributory

Contact Info

Product

Resources

About

A simplified simulation of the reaction mechanism of NOx formation and non-catalytic reduction

Cited by 5 publications

References 33 publications

Applicability of Secondary Denitrification Measures on a Fluidized Bed Boiler

Applicability of Secondary Denitrification Measures on a Fluidized Bed Boiler

NH3 production from absorbed NO with synergistic catalysis of Pd/C and functionalized ionic liquids

Study on Diesel Low-Nitrogen or Nitrogen-Free Combustion Performance in Constant Volume Combustion Vessels and Contributory

Contact Info

Product

Resources

About

A simplified simulation of the reaction mechanism of NO_x formation and non-catalytic reduction

NH₃ production from absorbed NO with synergistic catalysis of Pd/C and functionalized ionic liquids