THE ADSORPTION OF ARGON ON SOME VACUUM DEHYDRATED SALTS

1955 ◽  
Vol 33 (2) ◽  
pp. 286-297 ◽  
Author(s):  
H. W. Quinn ◽  
R. W. Missen ◽  
G. B. Frost
Keyword(s):  
Water Vapor ◽  
Crystalline State ◽  
Capillary Structure ◽  
X Ray ◽  
Effect Of Water ◽  
Probable Distribution ◽  
Vacuum Dehydration ◽  
Low Pressures ◽  
Amorphous Character

Isotherms for the adsorption of argon on amorphous products formed by the vacuum dehydration of several hydrated salts have been determined. These have shown that the adsorption is physical and that dehydration results in the formation of products of large capillary volume. The probable distribution of capillary diameters has been estimated and correlated with the effect of water vapor at low pressures in catalyzing the crystallization of the amorphous intermediates. Consideration of these findings, in the light of data for the heats of transition from the amorphous to the crystalline state, suggests that the X-ray amorphous character is not entirely due to the capillary structure but that other changes occur. The possible nature of these is discussed.

THE HEATS OF CRYSTALLIZATION OF VACUUM DEHYDRATED MAGNESIUM SULPHATE HEPTAHYDRATE AND COBALTOUS CHLORIDE HEXAHYDRATE

1956 ◽  
Vol 34 (5) ◽  
pp. 583-590 ◽  
Author(s):  
J. W. S. Jamieson ◽  
G. B. Frost
Keyword(s):  
Magnesium Sulphate ◽  
X Ray Diffraction ◽  
Cobaltous Chloride ◽  
X Ray ◽  
Surface Areas ◽  
Chloride Hexahydrate ◽  
Heat Of Transition ◽  
Vacuum Dehydration ◽  
Chloride Monohydrate ◽  
Amorphous Character

Magnesium sulphate monohydrate prepared by vacuum dehydration of the heptahydrate does not yield a pattern of X-ray diffraction lines, and in this sense may be said to have an amorphous character. By measurement of the heats of solution of the “X-ray amorphous” and crystalline monohydrates, the heat of transition has been found to be 6550 cal. mole−1. Cobaltous chloride monohydrate prepared by vacuum dehydration appears to be microcrystalline. The heat of transition to the normal crystalline form is 1390 cal. mole−1. These values are related to the surface areas of the vacuum dehydrated products.

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

Effect of Water Vapor on Ignition Temperatures of Methane-Air Mixtures

1934 ◽  
Vol 26 (1) ◽  
pp. 71-72 ◽  
Author(s):  
G. W. Jones ◽  
Henry. Seaman
Keyword(s):  
Water Vapor ◽  
Effect Of Water

Effect of water vapor on the pyrolysis of the Moroccan (Tarfaya) oil shale

1999 ◽  
Vol 48 (2) ◽  
pp. 65-76 ◽  
Author(s):  
K. El harfi ◽  
A. Mokhlisse ◽  
M.Ben Chanâa
Keyword(s):  
Water Vapor ◽  
Oil Shale ◽  
Effect Of Water

Oxidation of Si(100) in nitric oxide at low pressures: An x-ray photoelectron spectroscopy study

1997 ◽  
Vol 70 (1) ◽  
pp. 63-65 ◽  
Author(s):  
A. Kamath ◽  
D. L. Kwong ◽  
Y. M. Sun ◽  
P. M. Blass ◽  
S. Whaley ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Photoelectron Spectroscopy ◽  
Spectroscopy Study ◽  
X Ray ◽  
Low Pressures

The catalytic effect of water, water dimers and water trimers on H2S +3O2formation by the HO2+ HS reaction under tropospheric conditions

2016 ◽  
Vol 18 (26) ◽  
pp. 17414-17427 ◽  
Author(s):  
Tianlei Zhang ◽  
Chen Yang ◽  
Xukai Feng ◽  
Jiaxin Kang ◽  
Liang Song ◽  
...  
Keyword(s):  
Water Vapor ◽  
Catalytic Effect ◽  
Vapor Molecule ◽  
Effect Of Water ◽  
Water Vapor Molecule ◽  
Water Dimers

Catalyst X (X = H2O, (H2O)2and (H2O)3) is incorporated into the channel of H2S +3O2formation and the catalytic effect of water, water dimers and water trimers is mainly taken from the contribution of a single water vapor molecule.

In situ FTIR studies of CO oxidation over Fe-free and Fe-promoted PtY catalysts: Effect of water vapor addition

2011 ◽  
Vol 344 (1-2) ◽  
pp. 111-121 ◽  
Author(s):  
Zeinhom M. El-Bahy ◽  
Ahmed I. Hanafy ◽  
Mohamed M. Ibrahim ◽  
Masakazu Anpo
Keyword(s):  
Water Vapor ◽  
Co Oxidation ◽  
In Situ Ftir ◽  
Effect Of Water ◽  
Ftir Studies
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