scholarly journals Experimental studies of the flameless combustion of gas mixtures with impurities of ammonia, hydrogen and acetone on a platinum wire

2018 ◽  
Vol 0 (55) ◽  
pp. 71-79
Author(s):  
В. В. Калінчак ◽  
О. С. Черненко ◽  
М. В. Сікорський ◽  
Є. В. Бритавський ◽  
С. А. Стукалов
Keyword(s):  
Experimental Studies ◽  
Gas Mixtures ◽  
Platinum Wire ◽  
Flameless Combustion

Experimental Studies of Ion Backflow for a Bulk Micromegas Detector Using Various Argon-Based Gas Mixtures

2018 ◽  
pp. 81-90 ◽  
Author(s):  
Prasant Kumar Rout ◽  
Deb Sankar Bhattacharya ◽  
Purba Bhattacharya ◽  
Supratik Mukhopadhyay ◽  
Sudeb Bhattacharya ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Gas Mixtures

Separation of Binary Gas Mixtures by Thermal Diffusion Columns

1969 ◽  
Vol 24 (9) ◽  
pp. 1378-1382
Author(s):  
V.K. Saxena ◽  
S.C. Saxena
Keyword(s):  
Thermal Diffusion ◽  
Separation Factor ◽  
Qualitative Agreement ◽  
Gas Mixtures ◽  
Platinum Wire ◽  
Gas Mixture ◽  
Internal Diameter ◽  
Hot Wire ◽  
Mixture Separation ◽  
Special Relevance

Two hot-wire type of glass thermal diffusion columns (approximately 3 m long, 8 mm internal diameter and fitted with an axial platinum wire 0.5 mm diameter) have been used to study the characteristics of gas mixture separation. In particular, the mixtures of Ne-Ar and He-Ar are examined, and the dependence of the separation factor, q, on the pressure and composition of the gas mixture and the temperature of the hot-wire is investigated. The variation of q with pressure and temperature for nonisotopic mixtures is in qualitative agreement with the predictions of the theory for isotopic mixtures. Further q is found to increase as the proportion of the lighter component in the mixture is decreased. These conclusions are of special relevance for the purification of gas mixtures viz., the removal of the lighter gas impurity from the mixture.

Mass-Spectrometry of Supersonic Cluster Jets of Methane and Argon-Methane Mixtures

2012 ◽  
Vol 7 (3) ◽  
pp. 84-95
Author(s):  
Mikhail Khodakov ◽  
Aleksandr Zarvin ◽  
Valeriy Kaljada ◽  
Nikolay Korobeishchikov
Keyword(s):  
Mass Spectrum ◽  
Cluster Formation ◽  
Experimental Studies ◽  
Supersonic Jet ◽  
Molecular Beams ◽  
Gas Mixtures ◽  
Large Size ◽  
Set Up ◽  
Cluster Beams ◽  
Mixed Clusters

We describe a new experimental facility LEMPUS-2, which provides experimental research in supersonic flows of gases and gas mixtures in the oil-free vacuum. Model experiments in a flow of pure argon in order to verify and test the diagnostic equipment of set-up were performed. Experimental studies of the formation of cluster beams of methane and argon-methane mixtures have been performed to determine the optimal conditions for the formation of intense molecular beams of methane clusters. We obtain an intense molecular beam of methane clusters. It was found that in a supersonic jet of large size pure methane clusters are not diagnosed by the mass spectrum of oligomeric fragments, whereas in mixtures of argon with small admixtures of methane is recorded in the mass spectrum, apparently as oligomers of methane and mixed clusters of argon-methane . It was confirmed that the clustering of methane starts at lower pressures of inhibition than argon and lead to further delay of cluster formation in argon. It is shown that for high intensity methane clusters fluxes should be used specially selected gas mixtures

scholarly journals Problems of metrological assurance of gas analysis using IR spectroscopy

2019 ◽  
Author(s):  
Leonid Konopelko ◽  
Vitaly Beloborodov ◽  
Dmitry Rumiantsev ◽  
Ian Chubchenko
Keyword(s):  
Ir Spectroscopy ◽  
Absorption Spectroscopy ◽  
Measurement Accuracy ◽  
Experimental Studies ◽  
Gas Mixtures ◽  
Gas Analysis ◽  
Metrological Assurance ◽  
Accurate Data ◽  
Measuring Methods ◽  
Survey Article

The survey article presents the results of work on metrological assurance of measurements using IR spectrometers, IR correlation gas analyzers and CRDS instruments. For the successful application of the existing databases in absorption spectroscopy, it is necessary to identify the most accurate data and assign uncertainty to it, based on experimental studies using reference gas mixtures. The properties of the methods that lead to a deterioration in the measurement accuracy were investigated and the ways were suggested to overcome the shortcomings of the measuring methods.

Experimental Studies of the Separation of C2 Compounds from CH4 + C2H4 + C2H6 + N2 Gas Mixtures by an Absorption–Hydration Hybrid Method

2013 ◽  
Vol 52 (7) ◽  
pp. 2707-2713 ◽  
Author(s):  
Huang Liu ◽  
Liang Mu ◽  
Bei Liu ◽  
Xiaoxin Zhang ◽  
Jin Wang ◽  
...  
Keyword(s):  
Hybrid Method ◽  
Experimental Studies ◽  
Gas Mixtures

scholarly journals Cool Air-Gas Mixtures with Combustible Gas Admixtures Steady Flameless Combustion Delay Time on Platinum Particle (Wire)

2018 ◽  
Vol 19 (1) ◽  
pp. 53-59 ◽  
Author(s):  
V. V. Kalinchak ◽  
O. C. Chernenko ◽  
M. V. Sikorskyi ◽  
O. N. Sofronkov ◽  
A. V. Fedorenko
Keyword(s):  
Induction Period ◽  
Particle Diameter ◽  
Gas Mixtures ◽  
Flameless Combustion ◽  
Combustible Gas ◽  
Catalyst Temperature ◽  
Two Stages ◽  
And Diffusion ◽  
Gas Admixtures ◽  
Gas Ratio

The proposed work shows analytical way to find a build-up time (induction period) for a mode of steady flameless catalytic combustion on metallic wire for cool air-gas mixtures with combustible gaseous admixtures using as an example flameless combustion of air-gas mixtures with hydrogen admixture of a platinum wire. Steady flameless combustion is observable after an induction period due to increase of initial catalyst temperature exceeding critical point of ignition which depends on particle diameter and combustible gaseous admixture content. Total time of build-up time is split into two stages, being the time of catalytic reaction proceeding in transient and diffusion stages, respectively. Effects of combustible gas ratio, catalyst wire diameter and excess of initial temperature compared with point of ignition upon particular stages duration and induction period are illustrated.

scholarly journals Gas hydrate equilibria for CO2–N2 and CO2–CH4 gas mixtures—Experimental studies and thermodynamic modelling

2011 ◽  
Vol 301 (2) ◽  
pp. 171-190 ◽  
Author(s):  
J.-M. Herri ◽  
A. Bouchemoua ◽  
M. Kwaterski ◽  
A. Fezoua ◽  
Y. Ouabbas ◽  
...  
Keyword(s):  
Gas Hydrate ◽  
Experimental Studies ◽  
Gas Mixtures ◽  
Thermodynamic Modelling

3-D reconstruction and analysis of mammalian mitotic spindle structure

1992 ◽  
Vol 50 (1) ◽  
pp. 578-579
Author(s):  
Kent McDonald ◽  
David Mastronarde ◽  
Rubai Ding ◽  
Eileen O'Toole ◽  
J. Richard McIntosh
Keyword(s):  
Cross Sections ◽  
Mitotic Spindle ◽  
Experimental Studies ◽  
Video Camera ◽  
Three Dimensions ◽  
Mitotic Spindles ◽  
Black And White ◽  
Reconstruction Methods ◽  
Spindle Structure ◽  
Tissue Culture Line

Mammalian spindles are generally large and may contain over a thousand microtubules (MTs). For this reason they are difficult to reconstruct in three dimensions and many researchers have chosen to study the smaller and simpler spindles of lower eukaryotes. Nevertheless, the mammalian spindle is used for many experimental studies and it would be useful to know its detailed structure.We have been using serial cross sections and computer reconstruction methods to analyze MT distributions in mitotic spindles of PtK cells, a mammalian tissue culture line. Images from EM negatives are digtized on a light box by a Dage MTI video camera containing a black and white Saticon tube. The signal is digitized by a Parallax 1280 graphics device in a MicroVax III computer. Microtubules are digitized at a magnification such that each is 10-12 pixels in diameter.

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