2005
DOI: 10.1007/s10450-005-5404-y
|View full text |Cite
|
Sign up to set email alerts
|

Gas-Chromatographic Studies of the Interaction between Water and Methanol Molecules and the Surface of Carbon Materials

Abstract: The gas-chromatographic method is used to study the interaction of water and methanol molecules with active hydrophilic centres existing at the surface of thermally exfoliated graphite and graphitized thermal carbon black. The concentration of carboxyl and phenol hydroxyl groups at the surface of these sorbents is determined, and heats of adsorption of the studied molecules are shown to beQ a = 40−39 and 28−25 kJ/mol, respectively. It is also shown that adsorption of water at the hydrophilic centres at lowest … Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1

Citation Types

1
8
0

Year Published

2006
2006
2014
2014

Publication Types

Select...
5

Relationship

3
2

Authors

Journals

citations
Cited by 11 publications
(9 citation statements)
references
References 9 publications
1
8
0
Order By: Relevance
“…The fitted results are practically unchanged if n is increased beyond 4, which confirms the results of the quantum-chemical calculation, in correspondence with which the number of molecules in the adsorption center is equal to 4. Treatment of the experimental isotherms obtained in [6] at temperatures of 72, 82, and 93.9°C led to analogous results. It should be noted that fitting with respect to DE 1 , calculated in [4,5], also led to similar results.…”
Section: Fitting Of Data Obtained By the Chromatographic Methods And Rsupporting
confidence: 62%
See 1 more Smart Citation
“…The fitted results are practically unchanged if n is increased beyond 4, which confirms the results of the quantum-chemical calculation, in correspondence with which the number of molecules in the adsorption center is equal to 4. Treatment of the experimental isotherms obtained in [6] at temperatures of 72, 82, and 93.9°C led to analogous results. It should be noted that fitting with respect to DE 1 , calculated in [4,5], also led to similar results.…”
Section: Fitting Of Data Obtained By the Chromatographic Methods And Rsupporting
confidence: 62%
“…The structural-adsorptive properties of the adsorbent (specific surface by BET 54 m 2 /g, specific volume of mesopores 0.410 cm 3 /g, radius of mesopores 17.5 and 22.5 nm, general specific volume of the pores 0.414 cm 3 /g) were determined by adsorption of nitrogen using an ASAP 2000M apparatus (Micromeritics, USA) at a temperature of 77.2 K on samples previously evacuated at 120°C. The elution peaks were obtained on a Chrom-5 (Czechoslovakia) chromatograph equipped with a 100´0.3 cm steel column filled with a 0.200-0.315 nm fraction of the adsorbent, initially stabilized in a carrier flow at 120°C for 5-6 h. A more detailed description of the experimental results are given elsewhere [6].…”
Section: Methodsmentioning
confidence: 99%
“…The term "highly graphitised" refers to a carbon black which has been heated to a temperature of 2700K or higher under vacuum, or in a reducing environment of pure hydrogen. Three studies of water adsorption on graphitised carbon black were carried out by Kiselev et al [1], Easton and Machin [42] and Tarasevich et al [43]. Amongst these, the one by Kiselev and co-workers is of most interest to us because their isotherms are more extensive and suitable for comparison with simulation results.…”
Section: Resultsmentioning
confidence: 99%
“…The concentration of active centers on the surface of graphite is substantially higher than on the surface of GTB. For example, for thermally expanded graphite with S = 24 m 2 /g the total concentration of carboxylic and phenolic hydroxyl centers (C) amounts to c = 0.25 C/nm 2 , whereas for GTB with S = 54 m 2 /g c = 0.064 C/nm 2 [87]. Quite naturally, the heat of wetting of graphite with water is higher than for GTB.…”
mentioning
confidence: 97%
“…Their amount has been obtained by chemical [85], adsorption [86], and chromatographic [87] methods. The concentration of active centers on the surface of graphite is substantially higher than on the surface of GTB.…”
mentioning
confidence: 99%