The use of the theory of statistical moments for a description and evaluation of noble gase breakthrough in carbon adsorbent beds

1983 ◽  
Vol 48 (3) ◽  
pp. 827-837 ◽  
Author(s):  
Ludmila Wilhelmová ◽  
František Cejnar ◽  
Zdeněk Dvořák
Keyword(s):  
Gas Chromatography ◽  
Active Carbon ◽  
Noble Gases ◽  
Carbon Adsorbent ◽  
Breakthrough Curves ◽  
Statistical Moments ◽  
Dynamic Adsorption

The values of the first-fourth statistical moments have been determined of the argon, krypton and xenon breakthrough curves, which were measured on the active carbon Supersorbon HS and the carbon adsorbent Jado LD 1191 beds, at temperatures 298-473 K, by means of elution gas chromatography. The application of the Gram-Charlier series - including the first-fourth statistical moments - enabled to describe satisfactorily the breakthrough curves over the whole range of outlet concentrations of the studied gases. On the basis of the theory of statistical moments, selected parameters, characterizing the dynamic adsorption in the studied systems were determined. The obtained parameters allowed to compare and evaluate the properties of the adsorption beds of both adsorbents - especially with respect to their possible use as a packing in the delaying line units of radioactive noble gases.

Adsorption of noble gases on the carbon adsorbents supersorbon HS and Jado

1983 ◽  
Vol 48 (3) ◽  
pp. 819-826 ◽  
Author(s):  
Ludmila Wilhelmová ◽  
František Cejnar
Keyword(s):  
Gas Chromatography ◽  
Active Carbon ◽  
Noble Gases ◽  
Carbon Adsorbent ◽  
Adsorption Properties ◽  
Carbon Adsorbents ◽  
Adsorption Behaviour ◽  
Practical Application ◽  
Heats Of Adsorption ◽  
Temperature Range

The isotherms, isosters and heats of adsorption of argon, krypton and xenon were measured on the active carbon Supersorbon HS and the carbon adsorbent Jado LD 1191 - in a temperature range 298-473 K, using gas chromatography. Differences were observed in the adsorption behaviour of both types of adsorbents - which showed especially on the nonlinearity of adsorption isosters of all gases studied with the Jado LD 1191 adsorbent. It was found that both types of adsorbents possess good adsorption properties, which can be - for Supersorb HS - utilized in the beds of the delaying lines of radioactive noble gases. The practical application of the Jado LD 1191 adsorbent for the same purposes is limited by the presence of inactive teflon support in the structure of this adsorbent.

Gas Chromatography in Technology of High-Purity Noble Gases

2019 ◽  
Vol 55 (5-6) ◽  
pp. 384-391
Author(s):  
V. L. Bondarenko ◽  
M. Yu. Kupriyanov ◽  
T. G. Ustyugova ◽  
S. Yu. Vasyutinskii ◽  
A. I. Verkhovnyi
Keyword(s):  
Gas Chromatography ◽  
High Purity ◽  
Noble Gases

scholarly journals A Statistical Approach to Model Selection for Dynamic Adsorption Columns

2021 ◽  
pp. 128-167
Author(s):  
P. Musonge
Keyword(s):  
Mean Squared Error ◽  
Scale Up ◽  
Absolute Error ◽  
Breakthrough Curves ◽  
Dynamic Adsorption ◽  
Mean Values ◽  
Squared Error ◽  
Local Mean ◽  
Global Mean ◽  
Adsorption Systems

A variety of models have been used to describe and predict breakthrough curves for dynamic adsorption systems, in order to scale up laboratory and pilot plant systems. There are however limitations in the applicability of existing models. The study is aimed at providing unambiguous approaches in selecting the best performing model between Thomas, Yoon-Nelson and Bohart-Adams (B-A) models for three dynamic adsorption systems. Three approaches were implemented in this study using published experimental data of three adsorption systems. The first approach was the application of statistical analysis between actual and predicted breakthrough curves without modifying the models. The second and third approaches were application of local mean values (LMV) and global mean values (GMV) of empirical constants to predict breakthrough curves. Predictive and generalization performances of the three models were evaluated using the statistical criteria of Mean Absolute Error (MAE), Root mean Squared Error (RMSE) and Correlation Coefficient (R2).

Study of a new type of active carbon CF-1 as an adsorbent in gas chromatography

1982 ◽  
Vol 47 (2) ◽  
pp. 582-587 ◽  
Author(s):  
Ladislav Feltl ◽  
Jana Hronková ◽  
Eva Smolková
Keyword(s):  
Gas Chromatography ◽  
Stationary Phase ◽  
Active Carbon ◽  
Retention Data ◽  
Heats Of Adsorption ◽  
New Type

A new type of active carbon, CF-1, was used as the stationary phase in gas chromatography. The adsorption of n-alkanes C2-C5, 1-alkenes C2-C4, acetylene, alcohols, ethyl ethers, CO2, H2S and SO2 was studied. The measurements were carried out with the original adsorbent and after its reduction with hydrogen at a temperature of 1 000°C. The original and pretreated active carbon were evaluated on the basis of the determined retention data and calculated value of the differential heats of adsorption.

scholarly journals Adsorption Properties and Structure of Some Active Carbons

1993 ◽  
Vol 10 (1-4) ◽  
pp. 211-220 ◽  
Author(s):  
I.A. Bardina ◽  
E.V. Kalashnikova ◽  
N.V. Kovaleva ◽  
T.A. Rudnitskaya ◽  
N.K. Shonya
Keyword(s):  
Gas Chromatography ◽  
Carbon Black ◽  
Active Carbon ◽  
Graphitized Carbon Black ◽  
Adsorption Properties ◽  
Static Method ◽  
Active Carbons ◽  
Heats Of Adsorption ◽  
Graphitized Carbon ◽  
Low Coverage

Gas chromatography has been used to determine the initial low-coverage heats of adsorption of C2–C6 hydrocarbons and their derivatives on active carbon and graphitized carbon black. The porous structure of the active carbon has been determined from the adsorption isotherms of benzene measured at 25°C by a vacuum static method. The isotherms have been analyzed with the help of the BET and Dubinin–Radushkevich theories.

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