A Simplified Procedure and Apparatus for Measuring Surface Area of Fine Powders By Gas Adsorption

1957 ◽  
Vol 104 (5) ◽  
pp. 287 ◽  
Author(s):  
F. M. Starkweather ◽  
D. T. Palumbo
Keyword(s):  
Surface Area ◽  
Gas Adsorption ◽  
Fine Powders ◽  
Measuring Surface ◽  
Simplified Procedure

Measuring surface area of airborne titanium dioxide powder agglomerates: relationships between gas adsorption, diffusion and mobility-based methods

2011 ◽  
Vol 13 (12) ◽  
pp. 7029-7039 ◽  
Author(s):  
Ryan F. LeBouf ◽  
Bon Ki Ku ◽  
Bean T. Chen ◽  
David G. Frazer ◽  
Jared L. Cumpston ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Surface Area ◽  
Gas Adsorption ◽  
Titanium Dioxide Powder ◽  
Measuring Surface ◽  
Dioxide Powder

Physisorption of gases, with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)

2015 ◽  
Vol 87 (9-10) ◽  
pp. 1051-1069 ◽  
Author(s):  
Matthias Thommes ◽  
Katsumi Kaneko ◽  
Alexander V. Neimark ◽  
James P. Olivier ◽  
Francisco Rodriguez-Reinoso ◽  
...  
Keyword(s):  
Pore Size Distribution ◽  
Special Reference ◽  
Pore Size ◽  
Surface Area ◽  
Gas Adsorption ◽  
Porous Solids ◽  
Size Analysis ◽  
Fine Powders ◽  
Pore Size Analysis ◽  
Technical Report

AbstractGas adsorption is an important tool for the characterisation of porous solids and fine powders. Major advances in recent years have made it necessary to update the 1985 IUPAC manual on Reporting Physisorption Data for Gas/Solid Systems. The aims of the present document are to clarify and standardise the presentation, nomenclature and methodology associated with the application of physisorption for surface area assessment and pore size analysis and to draw attention to remaining problems in the interpretation of physisorption data.

A MULTI-SAMPLE HOLDER ASSEMBLY FOR THE QUANTASORB® SURFACE AREA ANALYZER

1987 ◽  
Vol 67 (3) ◽  
pp. 709-713
Author(s):  
H. KODAMA ◽  
M. JAAKKIMAINEN ◽  
R. DUCOURNEAU
Keyword(s):  
Surface Area ◽  
Gas Flow ◽  
Gas Adsorption ◽  
Detection Sensitivity ◽  
Gas Flows ◽  
Sample Holder ◽  
Standard Samples ◽  
Surface Areas ◽  
Measuring Surface ◽  
Bet Method

An inexpensive and simple multi-sample holder assembly was designed and constructed for the Quantasorb® surface area analyzer which is based on the BET gas adsorption isotherm principle. Four sample holder U-tubes were connected in parallel in order to maintain all samples equidistant from the detector. This arrangement keeps high gas detection sensitivity and minimizes the occurrence of unwanted turbulent gas flows in the system. The system was tested by measuring surface areas of reference standard samples. Excellent agreement was obtained. Key words: BET method, gas adsorption, gas flow sytem, parallel connection

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

Probing the performance of imide linked micro-porous polymers for enhanced CO2 gas adsorption applications

2021 ◽  
Author(s):  
Narendran Rajendran ◽  
Ali A. Husain ◽  
Saad Makhseed
Keyword(s):  
Surface Area ◽  
Gas Adsorption ◽  
Oxidative Polymerization ◽  
Porous Polymers ◽  
Bet Surface Area ◽  
Co2 Gas

Three new carbazole containing cross-linked polymers namely AH-Poly, TM-PDA-Poly and TMB-PDA-Poly were designed and successfully synthesized by an oxidative polymerization protocol. The prepared AH-Poly showed a specific BET surface area...

Hydrothermal Treatment of Coprecipitated YSZ Powders

2010 ◽  
Vol 660-661 ◽  
pp. 983-988 ◽  
Author(s):  
Alexander Rodrigo Arakaki ◽  
Walter Kenji Yoshito ◽  
Valter Ussui ◽  
Dolores Ribeiro Ricci Lazar
Keyword(s):  
Surface Area ◽  
Hydrothermal Treatment ◽  
Gas Adsorption ◽  
X Ray Diffraction ◽  
Electronic Microscopy ◽  
Immersion Method ◽  
Cubic Symmetry ◽  
X Ray ◽  
Granulometric Analysis ◽  
Symmetry Surface

Zirconia stabilized with 8.5 mol% yttria (YSZ) were synthesized by coprecipitation and resulting gels were hydrothermallly treated at 200°C and 220 PSI for 4, 8 and 16 hours. Products were oven dried at 70°C for 24 hours, isostatically pressed as pellets and sintered at 1500 °C for 1 hour. Powders were characterized for surface area with N2 gas adsorption, X-ray diffraction, laser diffraction granulometric analysis and scanning and transmission electronic microscopy. Density of ceramics was measured by an immersion method based on the Archimedes principle. Results showed that powders dried at 70°C are amorphous and after treatment has tetragonal/cubic symmetry. Surface area of powders presented a significant reduction after hydrothermal treatment. Ceramics prepared from hydrothermally treated powders have higher green density but sintered pellets are less dense when compared to that made with powders calcined at 800°C for 1 hour due to the agglomerate state of powders. Solvothermal treatment is a promising procedure to enhance density.

Sign in / Sign up

Export Citation Format

Share Document