Experimental Investigation of Concentration Dependency of Hydrophobic Catalyst Performance in Reaction of Isotope Exchange Between Water Vapor and Hydrogen

2017 ◽  
Vol 71 (2) ◽  
pp. 207-214 ◽  
Author(s):  
V. Tkachenko ◽  
A. V. Ovcharov ◽  
M. B. Rozenkevich
Keyword(s):  
Experimental Investigation ◽  
Water Vapor ◽  
Isotope Exchange ◽  
Concentration Dependency ◽  
Hydrophobic Catalyst

Effect of Water Vapor/Hydrogen Environments on Niobium, B-66 Niobium Alloy, Tantalum, and Ta-10W Alloy

CORROSION ◽  
1991 ◽  
Vol 47 (4) ◽  
pp. 272-280
Author(s):  
R. J. Walter ◽  
G. G. Bentle ◽  
W. T. Chandler
Keyword(s):  
Mechanical Properties ◽  
Experimental Investigation ◽  
Water Vapor ◽  
Complex Function ◽  
Tensile Tests ◽  
Niobium Alloy ◽  
Hydrogen Environment ◽  
Hydrogen Mixture ◽  
Effect Of Water

Abstract The results of an experimental investigation of the effect of water vapor/hydrogen environments on the mechanical properties of niobium, B-66 niobium alloy, tantalum, and Ta-10W alloy are presented. Tensile tests were conducted on specimens of these materials in water vapor/hydrogen environments with water vapor/hydrogen mixture ratios of 1 and 3. The water vapor/hydrogen environment caused strength reductions on tantalum and Ta—WW and ductility reductions on all four materials. The degree and causes of embrittlement were a complex function of temperature.

Experimental investigation on heat transfer of forced convection condensation of ethanol–water vapor mixtures on a vertical mini-tube

2013 ◽  
Vol 49 (9) ◽  
pp. 1231-1241 ◽  
Author(s):  
Xiping Chen ◽  
Daotong Chong ◽  
Jinshi Wang ◽  
Ronghai Huang ◽  
Junjie Yan
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Water Vapor ◽  
Forced Convection ◽  
Vapor Mixtures

Experimental investigation of the dependence of the gain in a CO2?N2 gasdynamic laser on the water vapor content

1977 ◽  
Vol 12 (4) ◽  
pp. 515-524 ◽  
Author(s):  
P. V. Belkov ◽  
V. P. Vakatov ◽  
B. K. Tkachenko ◽  
N. N. Shirokov
Keyword(s):  
Experimental Investigation ◽  
Water Vapor ◽  
Water Vapor Content ◽  
Gasdynamic Laser

scholarly journals Post-depositional changes in snow isotope content: preliminary results of laboratory experiments

2009 ◽  
Vol 5 (5) ◽  
pp. 2239-2267 ◽  
Author(s):  
A. A. Ekaykin ◽  
T. Hondoh ◽  
V. Y. Lipenkov ◽  
A. Miyamoto
Keyword(s):  
Water Vapor ◽  
Isotope Exchange ◽  
Laboratory Experiments ◽  
Ice Core ◽  
Relative Mass ◽  
Atmospheric Water ◽  
Preliminary Results ◽  
Set Up ◽  
Isotope Content ◽  
Snow Thickness

Abstract. Isotopic content of the snow and firn thickness is assumed to be altered significantly due to the post-depositional (PD) mass- and isotope exchange with the atmospheric water vapor. If so, these effects should be accounted for in the ice core-based isotope-temperature paleo-reconstructions. In order to study the intensity of the PD processes we set up a series of laboratory experiments. In this paper we describe in detail the experimental technique and briefly overview preliminary results. It is shown that the PD modifications in the upper layer of snow thickness are noticeably strong even under such a low temperature as −35°C (the value typical for the Central Antarctic summer). It is demonstrated that the PD isotopic changes in snow can be approximated as a linear function of the relative mass loss due to snow sublimation. Possible applications for improving the isotope-temperature paleo-reconstructions are shortly discussed.

scholarly journals Microphysical Characteristics and Environmental Isotope Effects of the Micro-Droplet Groups under the Action of Acoustic Waves

Atmosphere ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1488
Author(s):  
Wenwen Bai ◽  
Jiahua Wei ◽  
Yang Shi ◽  
Zhifeng Zhao ◽  
Qiong Li
Keyword(s):  
Particle Size ◽  
Water Vapor ◽  
Acoustic Waves ◽  
Isotope Exchange ◽  
Isotope Effects ◽  
Environmental Water ◽  
Size Spectrum ◽  
Environmental Isotope ◽  
Air Chamber ◽  
Characteristic Particle

Acoustics can cause particles/droplets to agglomerate in the air medium, thereby accelerating gravity sedimentation. To assess the microphysical characteristics and environmental isotope effects of micro-droplet groups under the action of acoustic waves, an air chamber experimental platform was established, and 100 groups of controlled experiments were conducted. The characteristic particle size, size spectrum, isotope values, corresponding linear relationships with hydrogen and oxygen, and d values were analyzed. The isotope exchange equation between the micro-droplet groups and environmental water vapor inside the air chamber was investigated. The results showed that the peak size values of the micro-droplet groups increased under the action of acoustic waves. The characteristic particle size (D90) showed a “trigger effect” with the acoustic operation with a positive deviation in the size spectrum and isotope exchange between the micro-droplet groups and environmental water vapor. The relative variations in theoretical values for different sedimentation conditions were consistent with those of the experimental results. Environment isotopes could be used to trace the acoustic agglomeration process of micro-droplets in the future.

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