Equilibrium composition and thermodynamic properties of high-temperature gas-mixtures

1982 ◽  
Vol 53 (2) ◽  
pp. 49-54 ◽  
Author(s):  
Wilfried Lyhs ◽  
Herbert Wilhelmi
Keyword(s):  
High Temperature ◽  
Thermodynamic Properties ◽  
Equilibrium Composition ◽  
Gas Mixtures ◽  
High Temperature Gas

Probe Diagnostics of Chemiionization Processes in Hydrocarbon High-Temperature Gas Mixtures

2020 ◽  
Vol 55 (6) ◽  
pp. 735-742
Author(s):  
P. A. Vlasov ◽  
D. I. Mikhailov ◽  
I. L. Pankrat’eva ◽  
V. A. Polyanskii
Keyword(s):  
High Temperature ◽  
Gas Mixtures ◽  
Probe Diagnostics ◽  
High Temperature Gas

A Method for Calculating the Equilibrium Thermodynamic Properties of Gas Reaction Mixtures

1998 ◽  
Vol 51 (1) ◽  
pp. 55
Author(s):  
Errol F. McCoy ◽  
Matthew J. Sykes
Keyword(s):  
Simulated Annealing ◽  
High Temperature ◽  
Thermodynamic Properties ◽  
Equilibrium Composition ◽  
Computational Method ◽  
Equilibrium Thermodynamic ◽  
Multicomponent Gas ◽  
Total Gibbs Energy ◽  
Downhill Simplex ◽  
Temperature Equilibrium

A computational method has been developed for determining the equilibrium composition and thermodynamic properties of a multicomponent gas reaction mixture. The method uses the downhill simplex method and simulated annealing to minimize, subject to matter conservation, the total Gibbs energy of the mixture with respect to its composition. The method has been used to examine the properties of various high-temperature equilibrium mixtures of species containing carbon, hydrogen, nitrogen and oxygen.

An Environmental Wet Cell For High Voltage Electron Microscopy

1973 ◽  
Vol 31 ◽  
pp. 18-19
Author(s):  
N.J. Tighe ◽  
H.M. Flower ◽  
P.R. Swann
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Image Quality ◽  
Inelastic Scattering ◽  
High Voltage ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
Environmental Cell ◽  
Water Saturated ◽  
High Temperature Gas

A differentially pumped environmental cell has been developed for use in the AEI EM7 million volt microscope. In the initial version the column of gas traversed by the beam was 5.5mm. This permited inclusion of a tilting hot stage in the cell for investigating high temperature gas-specimen reactions. In order to examine specimens in the wet state it was found that a pressure of approximately 400 torr of water saturated helium was needed around the specimen to prevent dehydration. Inelastic scattering by the water resulted in a sharp loss of image quality. Therefore a modified cell with an ‘airgap’ of only 1.5mm has been constructed. The shorter electron path through the gas permits examination of specimens at the necessary pressure of moist helium; the specimen can still be tilted about the side entry rod axis by ±7°C to obtain stereopairs.

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