Decomposition of nitrous oxide at medium temperatures

Löffler, G.; Wargadalam, Verina J.; Winter, Franz; Hofbauer, Hermann

doi:10.1016/s0010-2180(99)00106-6

Cited by 55 publications

(16 citation statements)

References 23 publications

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“…This explanation presumes that N 2 O does not offer an alternative way of initiation of the reaction. This assumption is supported by results of Löffler et al 36 that addition of pure methane does not promote N 2 O decomposition even at high temperatures. If, however, the mixture temperature is high enough to initiate an explosion starting with Equation (1) nevertheless, N 2 O decomposition may be triggered thus making the explosion more severe than in air.…”

Section: Resultssupporting

confidence: 57%

Ignition temperature of combustible liquids in mixtures of air with nitrous oxide

et al. 2021

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Summary While ignition temperatures in the air are well known for a large number of flammable substances and to a lesser extent in pure oxygen too, no such values exist for ignition temperatures in nitrous oxide in spite of the fact that nitrous oxide is used as oxidizer in combustion processes or aerosol propellant in industry. The ignition temperatures of some pure compounds have now been investigated in oxidizer mixtures of nitrous oxide and air with varying concentration of nitrous oxide up to 80 vol% using a slightly modified standardized apparatus. The ignition temperature increases with increasing nitrous oxide concentration. Up to 580°C, none of the investigated substances ignited in pure nitrous oxide.

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Section: Resultssupporting

confidence: 57%

Ignition temperature of combustible liquids in mixtures of air with nitrous oxide

et al. 2021

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“…[38] introduced N 2 O intermediate NO formation mechanism which occurred in lean fuel, moderate temperatures, and low pressure combustion conditions. In these circumstances N 2 O is converted to NO via the following formulas [39]:…”

Section: No Formation Mechanismsmentioning

confidence: 99%

The Effects of Air Preheating and Fuel/Air Inlet Diameter on the Characteristics of Vortex Flame

et al. 2015

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The effects of fuel/air inlet diameter as well as air preheating on the flame stability, temperature distribution, pollutant formation, and combustion characteristics of a lab-scaled asymmetric vortex flame have been investigated. A three-dimensional steady-state finite volume solver has been used to solve the governing and energy equations. The solver uses a first-order upwind scheme to discretize the governing equations in the space. The semi-implicit method for pressure linked equations has been applied to couple the pressure to the velocity terms. Several turbulence models were applied to predict the flame temperature and it was found thatk-εRNG has given the best results in accordance with the experimental results. The results reveal that the inlet air diameter can enhance the thermal properties and reduce theNOxemission while the inlet fuel diameter has less significant impact. Increasing diameters are accompanied with a pressure drop. It was found that preheating the air and fuel would significantly affect the flame temperature andNOxemission with constant mass flow rate.

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“…N 2 O concentration first increases and then decreases, which shows that the reaction rate of N 2 O formation increases after adding circulating ash. N 2 O is produced by deoxidization of NO with residue char or residue nitrogen [8,[9][10][11] ð -CNÞ þ NO ! N 2 O þ ð -CÞ (7) NO concentration in exhaust gas is low, which shows that the reaction rate of N 2 O formation is very low.…”

Section: Results Of Laboratory Experimentsmentioning

confidence: 99%

“…When the residue char and residue nitrogen are all consumed by O 2 in the reacting gas, the reaction rate of N 2 O formation decreases while the reaction rate of N 2 O thermal decomposition is accelerated by the circulating ash. Metal oxides, such as Fe 2 O 3 and CaO in the circulating ash, are believed to be active catalysts for N 2 O thermal decomposition [11,12]; therefore, N 2 O concentration in exhaust gas is lower than that before adding circulating ash.…”

Section: Results Of Laboratory Experimentsmentioning

confidence: 99%

Effect of circulating ash from CFB boilers on NO and N2O emission

Hou¹,

Shen

et al. 2009

Front. Energy Power Eng. China

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NO and N 2 O emissions from circulating fluidized bed (CFB) boilers are determined by their formation and destruction rates in the furnace. The effect of circulating ash from a CFB boiler on NO and N 2 O emissions were investigated in a laboratory-scale fluidized bed reactor. The results show that the residue char in circulating ash and the CO generated from the char play an important role in NO reduction and N 2 O formation; however, active components of circulating ash such as CaO, Fe 2 O 3 accelerate the decomposition of N 2 O. Experiment was also conducted on a 75 t/h CFB boiler fueled with the mixture of anthracite and biomass. The lower residue carbon content of circulating ash in this experiment is lower; therefore, the reacting rate of NO deoxidize is limited. This result verified the conclusion of laboratory research.

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Decomposition of nitrous oxide at medium temperatures

Cited by 55 publications

References 23 publications

Ignition temperature of combustible liquids in mixtures of air with nitrous oxide

Ignition temperature of combustible liquids in mixtures of air with nitrous oxide

The Effects of Air Preheating and Fuel/Air Inlet Diameter on the Characteristics of Vortex Flame

Effect of circulating ash from CFB boilers on NO and N2O emission

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