The adsorption of vapours by activated and heat-treated microporous carbons. Part 2. Assessment of surface polarity using water adsorption
✍ Scribed by R.H Bradley; B Rand
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 407 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0008-6223
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✦ Synopsis
Data for water adsorption at 293 K by an activated series and a heat-treated series of PVDC based carbons are reported. Type 5 (BDDT) isotherms were obtained for adsorption by each carbon. Total water adsorption volumes (a,) are lower than total pore volumes and Dubinin-Radushkevich micropore volumes previously established by nitrogen adsorption for these adsorbents. Possible reasons for this are discussed. Analysis of the isotherm data using the ~binin-slinky equation allows a qual$ative assessment to be made of the relative polarities of the carbon structures investigated. However, no correlation between the parameter Q (the specific water adsorption value from that equation) and the absolute concentration of oxide species present appears possible for a given carbon.