Get 210-2019: State Primary Standard of Units of Specific Adsorption of Gases, Specific Surface Area of Pores, Specific Volume of Pores, Dimension of Pores, Open Porosity, and Coefficient of Gas Permeability of Solid Substances and Fabricated Materials

2021 ◽  
Author(s):  
E. P. Sobina
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Open Porosity ◽  
Specific Volume ◽  
Gas Permeability ◽  
Primary Standard ◽  
Specific Adsorption ◽  
State Primary Standard ◽  
Adsorption Of Gases

scholarly journals Development of the reference material of nanoporous zeolite

2020 ◽  
Vol 16 (1) ◽  
pp. 25-41
Author(s):  
E. P. Sobina
Keyword(s):  
Reference Material ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Pore Volume ◽  
Gas Permeability ◽  
Experimental Studies ◽  
Metrological Traceability ◽  
Metrological Characteristics ◽  
Measuring Instruments

The article is devoted to the development of a reference material of the sorption roperties of nanoporous zeolite, which ensures metrological traceability of measurement results to the State primary measurement standard of units for specific gas adsorption, specific surface area, specific pore volume, pore size, open porosity and gas permeability coefficient of solid substances and materials GET 210-2019.The paper presents the results of theoretical and experimental studies on optimizing the conditions of sample preparation (thermal training) of the reference material using the thermogravimetric method and differential scanning calorimetry, coupled with mass spectrometric detection of the evolved gases (TG-DSC–MS analysis). The results of establishing the metrological characteristics of the reference material are described, including standard uncertainty due to the method of determining the certified value, as well as standard uncertainties from heterogeneity and instability. The GSO 10734–2015 reference material of the sorption properties of nanoporous zeolite (Zeolite SO UNIIM) has certified metrological characteristics: specific surface area (500–1200) m2/g; specific pore volume (0.10.5) cm3/g; the predominant pore diameter (0.4–0.9) nm; specific argon adsorption (0.001–20.0) mol/kg.The reference material is designed to calibrate measuring instruments and to control accuracy of results of sorption characteristics of nanoporous materials measurements; it can be used to certify appropriate measurement procedures, to test measuring instruments and reference materials for type approval and other types of metrological control. 

Final report of CCQM-K153 Measurement of Specific Adsorption A [mol/kg] of N2 and Kr on nonporous SiO2 at LN temperature (to enable a traceable determination of the Specific Surface Area (BET) following ISO 9277)

Metrologia ◽  
2019 ◽  
Vol 56 (1A) ◽  
pp. 08013-08013
Author(s):  
Egor Sobina ◽  
Annett Zimathies, ◽  
Carsten Prinz ◽  
Franziska Emmerling ◽  
Akira Kurokawa ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Specific Adsorption ◽  
Final Report

Modification of Inner Pores with Silicon Carbide Whiskers onto the Al2O3 Substrate by CVI Process

2005 ◽  
Vol 287 ◽  
pp. 212-219 ◽  
Author(s):  
W.S. Park ◽  
Doo Jin Choi ◽  
Hai Doo Kim
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Volume Fraction ◽  
Gas Permeability ◽  
Porous Alumina ◽  
Porous Ceramic ◽  
Chemical Vapor ◽  
Chemical Vapor Infiltration ◽  
Particulate Filter

In this study, SiC whiskers were grown in porous alumina substrate in order to enhance the filtering efficiency, performance, and durability by controlling pore morphology. This experiment was performed by chemical vapor infiltration (CVI) in order to obtain the whiskers on the inside of pores as well as on the surface of porous the Al2O3 substrate. The deposition morphology was changed remarkably with the deposition position and temperature. First, the mean diameter of whisker was decreased as the position of observation moved into the inside of substrate due to ‘the depletion effect’ and ‘the pressure effect’. Second, the deposition temperature caused the changes of the deposition type such as debris, whiskers and films and these changes of morphology affect the various properties. When SiC films were deposited, the gas permeability and the specific surface area decreased. However, the whisker showed the opposite result; a large specific surface area provides the absorption site and the whiskers in gas traveling path hinder the particles from easily flowing. Comparing with the normal pores (inter-grain open pores), the pores formed by the whiskers have relatively large volume fraction under the same pore size. Porous ceramic filters with whisker will be expected to increase the filtering efficient and gas permeability simultaneously. It is the main advantage of our whiskered filter. Therefore the porous alumina body which deposited the SiC whisker will be the promising material in order to apply to the particulate filter.

Sorption of Oil by Swollen Graphite: Contributions of Specific Surface Area and Specific Volume

2004 ◽  
Vol 77 (5) ◽  
pp. 745-749 ◽  
Author(s):  
M. V. Savos'kin ◽  
A. P. Yaroshenko ◽  
V. I. Shologon ◽  
L. Ya. Galushko
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Specific Volume
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