In the present work, two kinds of porous silicas (PS-C16 Two kinds of the porous silicas with uniform and cylindrical and PS-C18) were synthesized from the calcined Na 4 SiO 4 pores were prepared from calcined Na 4 SiO 4 and cationic surfacand the cationic surfactant of [C 16 H 33 N(CH 3 ) 3 ]Cl or
A new analysis method for the determination of the pore size distribution of porous carbons from nitrogen adsorption measurements
β Scribed by N.A. Seaton; J.P.R.B. Walton; N. quirke
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 804 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0008-6223
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β¦ Synopsis
A new analysis method has been developed for the determination of the pore size distribution of porous carbons from nitrogen adsorption measurements. The method is based on a molecular model for the adsorption of nitrogen in porous carbon. It allows, for the first time, the distribution of pore sizes to be determined over both the micropore and mesopore size ranges using a single analysis method. In addition to carbons, this method is also applicable to a range of adsorbents. such as silicas and aluminas.
π SIMILAR VOLUMES
The adsorption isotherms of N 2 gas at 77 K and CCl 4 vapor at 283.1 5 , 298.1 5 , and 308.1 5 K were measured for six samples of the mesoporous silicas having uniform cylindrical pores (MCM-41). The pore radii of the six samples (r p ), which were evaluated from the Ξ± s plots of the N 2 isotherms,
A good correlation was found between apparent BET surface area and total pore volume determined for a number of active charcoals by measurement of the nitrogen adsorption isotherms at 77 K. A similar correlation is also illustrated in which apparent BET surface area is calculated from the uptake of