Effects of Probing Vapors and Temperature on the Characterization of Micro-Mesopore Size Distribution of Carbonaceous Materials

Nguyen, C. and Do, D. D. (2000) Effects of Probing Vapors and Temperature on the Characterization of Micro-Mesopore Size Distribution of Carbonaceous Materials. Langmuir, 16 18: 7218-7222. doi:10.1021/la991596a


Author Nguyen, C.
Do, D. D.
Title Effects of Probing Vapors and Temperature on the Characterization of Micro-Mesopore Size Distribution of Carbonaceous Materials
Journal name Langmuir   Check publisher's open access policy
ISSN 0743-7463
Publication date 2000-09
Sub-type Article (original research)
DOI 10.1021/la991596a
Volume 16
Issue 18
Start page 7218
End page 7222
Total pages 5
Place of publication Washingto, D.C.
Publisher American Chemical Society
Collection year 2000
Language eng
Subject C1
780102 Physical sciences
250103 Colloid and Surface Chemistry
0306 Physical Chemistry (incl. Structural)
0903 Biomedical Engineering
0904 Chemical Engineering
Abstract A technique for determining micro-mesopore size distribution developed by Nguyen and Do [Nguyen, C.; Do, D. D. Langmuir 1999, 15, 3608] is tested with nitrogen adsorption data at 77 K and benzene adsorption data at near ambient temperatures of two carbonaceous samples. The PSD results using nitrogen data are compared with the results obtained from the DFT technique. In general, they agree very well with each other, though sharper micro and mesopore peaks are observed with our results. The PSDs derived from benzene adsorption data using our technique are practically independent of temperature, reinforcing the assertion that the PSD is the porous media's intrinsic property. However when this benzene-derived PSD is compared with nitrogen-derived PSD, some small but subtle differences are observed. This could be due to the difference in the gas-solid interaction, the molecule packing in pores, and the adsorption temperatures of nitrogen (77 K) and benzene (near ambient).
Keyword Chemistry, Physical
Porous materials
thermal effects
Vapors
Adsorption
Benzene
Carbon
Nitrogen
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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Created: Tue, 10 Jun 2008, 12:28:25 EST