Phase equilibrium for clathrate hydrates formed from an ozone+oxygen gas mixture coexisting with carbon tetrachloride or 1,1-dichloro-1-fluoroethane

2011 ◽  
Vol 305 (2) ◽  
pp. 145-151 ◽  
Author(s):  
Sanehiro Muromachi ◽  
Takahiro Nakajima ◽  
Ryo Ohmura ◽  
Yasuhiko H. Mori
Keyword(s):  
Phase Equilibrium ◽  
Carbon Tetrachloride ◽  
Clathrate Hydrates ◽  
Gas Mixture ◽  
Oxygen Gas

Preparation of hydrophobic flat sheet membranes from PVDF-HFP copolymer for enhancing the oxygen permeance in nitrogen/oxygen gas mixture

2020 ◽  
Vol 28 (6) ◽  
pp. 1566-1581
Author(s):  
Bahador Akbari ◽  
Asghar Lashanizadegan ◽  
Parviz Darvishi ◽  
Abdolrasoul Pouranfard
Keyword(s):  
Gas Mixture ◽  
Flat Sheet ◽  
Oxygen Gas

Effects of Aluminum Implantation on the Oxidation Behavior of Silicon Nitride in a Sodium Nitrate-Oxygen Gas Mixture

1996 ◽  
Vol 438 ◽  
Author(s):  
Y. Cheong ◽  
H. Du ◽  
S. P. Withrow
Keyword(s):  
Sodium Nitrate ◽  
Marked Improvement ◽  
Oxidation Behavior ◽  
Morphological Characteristics ◽  
Aluminum Concentration ◽  
Gas Mixture ◽  
Aluminum Implantation ◽  
Oxygen Gas ◽  
Si3n4 Ceramics

AbstractThe role of aluminum in negating the adverse effect of alkali species on the oxidation resistance of Si3N4 ceramics was investigated by exposing unimplanted and aluminum-implanted (1 and 5 at.%) Si3N4 samples to a sodium nitrate (95 ppm)-dry oxygen gas mixture at 1. atm and at 900°1100°C. Oxidation of unimplanted Si3N4 was rapid and linear with an activation energy of 57 kJ/mol. In contrast, samples implanted with aluminum exhibited a considerably reduced oxide growth which was parabolic in nature with activation energies of 103–112 kJ/mol. The morphological characteristics of the oxide layer also showed marked improvement as the aluminum concentration increased.

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