Experimental and Detailed Modeling Study of the Effect of Water Vapor on the Kinetics of Combustion of Hydrogen and Natural Gas, Impact on NOx

2009 ◽  
Vol 23 (2) ◽  
pp. 725-734 ◽  
Author(s):  
T. Le Cong ◽  
P. Dagaut
Keyword(s):  
Water Vapor ◽  
Natural Gas ◽  
Effect Of Water ◽  
Kinetics Of ◽  
Combustion Of Hydrogen ◽  
Modeling Study

Effect of Water Vapor on the Kinetics of Combustion of Hydrogen and Natural Gas: Experimental and Detailed Modeling Study

2008 ◽  
Author(s):  
Tanh Le Cong ◽  
Philippe Dagaut
Keyword(s):  
Water Vapor ◽  
Natural Gas ◽  
Gas Turbines ◽  
Kinetic Scheme ◽  
Fused Silica ◽  
Pollutant Emissions ◽  
Kinetic Reaction ◽  
Effect Of Water ◽  
Oxidation Of Hydrogen ◽  
Kinetics Of

The dilution of fuels by exhausts gases (mainly CO, CO2 and H2O) affects the kinetics of combustion. This dilution is used in gas turbines and flameless combustor. It helps reducing pollutant emissions, particularly NOx. Therefore, it is useful to study the effect of such compounds on the kinetics of oxidation of fuels such as natural gas and hydrogen. The oxidation of hydrogen and that of methane were studied experimentally in a fused silica jet-stirred reactor (JSR) over the temperature range 800–1500 K, from fuel-lean to fuel-rich conditions. The experiments were repeated in presence of 10% in mole of water vapor. A detailed chemical kinetic modeling of the present experiments and of literature data (flame speed, ignition delays) was performed using a previously proposed kinetic reaction mechanism, showing good agreement between the data and this modeling. Sensitivity and reaction paths analyses were used to delineate the important reactions influencing the kinetic of oxidation of the fuels in presence of water vapor. The kinetic reaction scheme proposed helps understanding the inhibiting effect of water vapor on the oxidation of hydrogen and methane. The effect of water vapor on NOx formation under gas turbine conditions was also investigated numerically using the proposed kinetic scheme.

The effect of water vapor on surface oxygen exchange kinetics of thin film (La,Sr)(Co,Fe)O3-δ

2020 ◽  
Vol 451 ◽  
pp. 227478
Author(s):  
Dongwei Xu ◽  
E. Mitchell Hopper ◽  
Kee-Chul Chang ◽  
Peter M. Baldo ◽  
Haesun Park ◽  
...  
Keyword(s):  
Thin Film ◽  
Water Vapor ◽  
Oxygen Exchange ◽  
Surface Oxygen ◽  
Effect Of Water ◽  
Exchange Kinetics ◽  
Kinetics Of

scholarly journals The inhibition effect of water on the purification of natural gas with nanoporous graphene membranes

2018 ◽  
Vol 9 ◽  
pp. 1906-1916 ◽  
Author(s):  
Krzysztof Nieszporek ◽  
Tomasz Pańczyk ◽  
Jolanta Nieszporek
Keyword(s):  
Natural Gas ◽  
Hydrogen Bonds ◽  
Membrane Separation ◽  
Extreme Case ◽  
Gas Permeation ◽  
Effect Of Water ◽  
Nanoporous Graphene ◽  
Analysis Of Stability ◽  
Dynamics Simulations ◽  
Kinetics Of

Molecular dynamics simulations are used to investigate the inhibiting effect of water on the natural gas separation with nanoporous graphene. The membrane separation process involves CH4 + N2 mixtures with and without the addition of water. The results show that water is able to form hydrogen bonds with nitrogen atoms located in a nanopore rim. This effect causes a decrease of separation selectivity as well as a reduction of gas permeation. In the extreme case, when the nanopore rim contains only nitrogen atoms, water agglomerates at the center of the nanopore and effectively closes down the permeation path. The conclusions are confirmed by the analysis of stability and kinetics of hydrogen bonds.

scholarly journals Revealing the effect of water vapor pressure on the kinetics of thermal decomposition of magnesium hydroxide

2020 ◽  
Vol 22 (24) ◽  
pp. 13637-13649 ◽  
Author(s):  
Satoki Kodani ◽  
Shun Iwasaki ◽  
Loïc Favergeon ◽  
Nobuyoshi Koga
Keyword(s):  
Thermal Decomposition ◽  
Water Vapor ◽  
Vapor Pressure ◽  
Magnesium Hydroxide ◽  
Water Vapor Pressure ◽  
Kinetics Of Thermal Decomposition ◽  
Effect Of Water ◽  
Kinetics Of ◽  
Kinetic Features

Kinetic features of the thermal decomposition of Mg(OH)2 are revealed under different heating and water vapor pressure conditions.

The effect of water vapor in increasing growth stresses in the oxide scale on martensitic steam plant alloys

2005 ◽  
Vol 22 (1) ◽  
pp. 139-146 ◽  
Author(s):  
Alexander Donchev ◽  
Harald Fietzek ◽  
Vladislav Kolarik ◽  
Daniel Renusch ◽  
Michael Schütze
Keyword(s):  
Water Vapor ◽  
Oxide Scale ◽  
Growth Stresses ◽  
Effect Of Water ◽  
Steam Plant
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