scholarly journals The rate constant of the reaction NCN + H2 and its role in NCN and NO modeling in low pressure CH4/O2/N2-flames

2015 ◽  
Vol 17 (24) ◽  
pp. 15876-15886 ◽  
Author(s):  
Nancy Faßheber ◽  
Nathalie Lamoureux ◽  
Gernot Friedrichs
Keyword(s):  
High Temperature ◽  
Rate Constant ◽  
Low Pressure ◽  
Temperature Rate ◽  
First Time

The high temperature rate constant of the so-far neglected reaction NCN + H2 has been measured for the first time and its influence on NOx flame modeling has been evaluated by implementation into the GDFkin3.0_NCN mechanism.

scholarly journals Direct measurements of the total rate constant of the reaction NCN + H and implications for the product branching ratio and the enthalpy of formation of NCN

2014 ◽  
Vol 16 (23) ◽  
pp. 11647-11657 ◽  
Author(s):  
Nancy Faßheber ◽  
Johannes Dammeier ◽  
Gernot Friedrichs
Keyword(s):  
High Temperature ◽  
Enthalpy Of Formation ◽  
Rate Constant ◽  
Branching Ratio ◽  
Total Rate ◽  
Direct Measurements ◽  
Temperature Rate ◽  
First Time ◽  
Product Branching ◽  
The Enthalpy Of Formation

The high-temperature rate constant of the reaction NCN + H, a key reaction for modelling NOx formation in flames, has been directly measured for the first time.

Experimental Determination of the High-Temperature Rate Constant for the Reaction of OH with sec-Butanol

2012 ◽  
Vol 116 (39) ◽  
pp. 9607-9613 ◽  
Author(s):  
Genny A. Pang ◽  
Ronald K. Hanson ◽  
David M. Golden ◽  
Craig T. Bowman
Keyword(s):  
High Temperature ◽  
Experimental Determination ◽  
Rate Constant ◽  
Temperature Rate

Spectroscopic studies of C 2 , CH and OH radicals in low pressure acetylene+oxygen flames

1970 ◽  
Vol 315 (1520) ◽  
pp. 129-147 ◽  
Keyword(s):  
Experimental Evidence ◽  
Rate Constant ◽  
Close Agreement ◽  
Low Pressure ◽  
Spectroscopic Studies ◽  
Lower State ◽  
Oh Radicals ◽  
Radiative Emission ◽  
First Time

Temperatures and concentrations of OH(X 2 II and A 2 ∑+), CH(X 2 II and A 2 ∆) and C 2 (X 3 II u and A 3 II g ) have been further studied in low-pressure C 2 H 2 + O 2 flames. For any given state (with the possible but unlikely exception of upper state OH), vibrational and rotational temperatures are in close agreement. The upper state temperature of a given species always exceeds the corresponding lower state temperature. The highest upper state temperatures normally recorded are 7000 K, for C 2 (A 3 II g ) and OH(A 2 ∑+), but, quite exceptionally, values up to 9000 K are found for OH(A 2 ∑+) at the very earliest stages of combustion. No lower state temperature exceeds 3000 K. The temperature of CH( 2 II) is quite normal, equalling within 100 K the measured translational flame temperatures. The temperatures of CH( 2 ∆), OH(X 2 II) and C 2 (X 3 II u ) are all similar, lying in the range 2500 to 3000 K. C 2 (A 3 II g ) and OH(A 2 ∑+) temperatures are broadly similar too, falling between 5000 and 7000 K. Firm experimental evidence in support of Gaydon’s reaction C 2 (X 2 II 0 ) + OH(X 2 II) → CH(A 2 ∆) + CO(X 1 ∑+) Is provided for the first time; its rate constant at 2200 K is estimated to be 8 ± 4 x 10 -12 ml molecules -1 s -1 . This reaction is not, however, responsible for formation of CH(X 2 H). Neither C 2 (X 3 II u ) nor C 2 (A 3 II g ) are formed in the reaction CH + CH → C 2 + H 2. At the pressures of these experiments, OH(A 2 Ʃ -) is strongly quenehed, but both CH(A 2 ∆) and C 2 (A 3 II z ) decay predominantly through radiative emission.

High-Temperature Rate Constant Determination for the Reaction of OH with iso-Butanol

2012 ◽  
Vol 116 (19) ◽  
pp. 4720-4725 ◽  
Author(s):  
Genny A. Pang ◽  
Ronald K. Hanson ◽  
David M. Golden ◽  
Craig T. Bowman
Keyword(s):  
High Temperature ◽  
Rate Constant ◽  
Constant Determination ◽  
Temperature Rate

Propargyl recombination: estimation of the high temperature, low pressure rate constant from flame measurements

2005 ◽  
Vol 30 (1) ◽  
pp. 1023-1031 ◽  
Author(s):  
Christian L. Rasmussen ◽  
Martin S. Skjøth-Rasmussen ◽  
Anker D. Jensen ◽  
Peter Glarborg
Keyword(s):  
High Temperature ◽  
Rate Constant ◽  
Low Pressure

High-temperature rate constant measurements for OH + xylenes

2015 ◽  
Vol 162 (6) ◽  
pp. 2348-2353 ◽  
Author(s):  
Ahmed Elwardany ◽  
Jihad Badra ◽  
Aamir Farooq
Keyword(s):  
High Temperature ◽  
Rate Constant ◽  
Temperature Rate

Shock Tube Measurement of the High-Temperature Rate Constant for OH + CH3 → Products

2015 ◽  
Vol 119 (33) ◽  
pp. 8799-8805 ◽  
Author(s):  
Shengkai Wang ◽  
Sijie Li ◽  
David F. Davidson ◽  
Ronald K. Hanson
Keyword(s):  
High Temperature ◽  
Shock Tube ◽  
Rate Constant ◽  
Temperature Rate

Fouling Is the Beginning: Upcycling Biopolymer-Fouled Substrates for Fabricating High-Permeance Thin-Film Composite Polyamide Membranes

2020 ◽  
Author(s):  
Ruobin Dai ◽  
Hongyi Han ◽  
Tianlin Wang ◽  
Jiayi Li ◽  
Chuyang Y. Tang ◽  
...  
Keyword(s):  
Thin Film ◽  
High Pressure ◽  
End Of Life ◽  
Water Purification ◽  
Low Pressure ◽  
Polymeric Membranes ◽  
Membrane Recycling ◽  
Film Composite ◽  
Thin Film Composite ◽  
First Time

Commercial polymeric membranes are generally recognized to have low sustainability as membranes need to be replaced and abandoned after reaching the end of their life. At present, only techniques for downcycling end-of-life high-pressure membranes are available. For the first time, this study paves the way for upcycling fouled/end-of-life low-pressure membranes to fabricate new high-pressure membranes for water purification, forming a closed eco-loop of membrane recycling with significantly improved sustainability.

Low-Pressure, High-Temperature Oxidation of Tungsten

JOM ◽  
1961 ◽  
Vol 13 (7) ◽  
pp. 490-493 ◽  
Author(s):  
R. A. Perkins ◽  
D. D. Crooks
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Low Pressure ◽  
Temperature Oxidation

Dynamic Viscosity of Compressed Water to 10 Kilobar and Steam to 1500°C

1969 ◽  
Vol 11 (2) ◽  
pp. 189-205 ◽  
Author(s):  
E. A. Bruges ◽  
M. R. Gibson
Keyword(s):  
Gaseous Phase ◽  
Dynamic Viscosity ◽  
Low Temperatures ◽  
Pressure Range ◽  
Low Pressure ◽  
Temperature Range ◽  
Inversion Temperature ◽  
Pressure Steam ◽  
Correlating Equations ◽  
First Time

Equations specifying the dynamic viscosity of compressed water and steam are presented. In the temperature range 0-100cC the location of the inversion locus (mu) is defined for the first time with some precision. The low pressure steam results are re-correlated and a higher inversion temperature is indicated than that previously accepted. From 100 to 600°C values of viscosity are derived up to 3·5 kilobar and between 600 and 1500°C up to 1 kilobar. All the original observations in the gaseous phase have been corrected to a consistent set of densities and deviation plots for all the new correlations are given. Although the equations give values within the tolerances of the International Skeleton Table it is clear that the range and tolerances of the latter could with some advantage be revised to give twice the existing temperature range and over 10 times the existing pressure range at low temperatures. A list of the observations used and their deviations from the correlating equations is available as a separate publication.

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