In our previous papers [Tรณth, J., et al., J. Colloid Interface Sci. 212, 402 (1999); 212, 411 (1999)] it has been proven that a BET-compatible specific surface area, a(s)(c)(N(2), 77), can be calculated from any Type I monolayer isotherms and from the monolayer domain of Type II isotherms, both meas
The determination of the surface area of powders by means of low-temperature adsorption isotherms
โ Scribed by Bugge, P. E. ;Kerlogue, R. H.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1947
- Weight
- 550 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0368-4075
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
A simple routine procedure for the determination of the surface area of 'powders by means of lowโtemperature adsorption isotherms is described with full experimental and and mathematical detail. A method of interpretation has been formulated permitting the elimination of the โdeadspaceโ determination for routine procedure where the substance is known to give an Sโshaped isotherm.
๐ SIMILAR VOLUMES
It may occur in practice that the nitrogen isotherm should be measured at 77 K only in order to determine the Brunauer-Emmett-Teller (BET) specific surface area [as(N2, 77)]. This fact has given cause for an elaborate method to calculate the value of as(N2, 77) from Type I isotherms measured on any
## Abstract A method which allows the rapid and accurate determination of specific surface area for materials from a single point on the nitrogen adsorption isotherm is described. The calculation is made from a single adsorption point which can lie almost anywhere on the isotherm. The method does n
mixed acids from the origiunl oil (77 g.) \rere dissolved in light petroleum nt 0" (wlieu 10.0 g. of resin scpsrnted) i t i d subsequeutly stcam-distilled (yielding 0.95 g. volatile mnterisl, cquir. 156 -1) prior to conversiou into nictliyl esters. Tliese were fairly rendily hydrogennted r r t 100"