scholarly journals The three-parametric adsorption equation and its adaptability. (IV). Application of three parameter adsorption equation to nitrogen adsorption isotherms on the powders with small surface area.

1989 ◽  
Vol 26 (5) ◽  
pp. 322-327
Author(s):  
Atsushi ENDO ◽  
Noboru SUZUKI ◽  
Yukie KIMURA ◽  
Masato KANAMAKI ◽  
Kenji KATSUME ◽  
...  
Keyword(s):  
Surface Area ◽  
Adsorption Isotherms ◽  
Nitrogen Adsorption ◽  
Small Surface ◽  
Adsorption Equation ◽  
Small Surface Area ◽  
Nitrogen Adsorption Isotherms

scholarly journals Structural changes in activated wood-based carbons: correlation between specific surface area and localization of molecular-sized pores

Holzforschung ◽  
2006 ◽  
Vol 60 (1) ◽  
pp. 85-92 ◽  
Author(s):  
Andreas Herzog ◽  
Boris Reznik ◽  
Tengfei Chen ◽  
Thomas Graule ◽  
Ulrich Vogt
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Surface Area ◽  
Adsorption Isotherms ◽  
Structural Changes ◽  
Nitrogen Adsorption ◽  
Average Pore ◽  
High Resolution Tem ◽  
Average Size ◽  
Nitrogen Adsorption Isotherms

Abstract Samples of maple were pyrolyzed and subsequently activated by carbon dioxide at different temperatures for various dwell times. The changes in wood structure were characterized by nitrogen adsorption isotherms, transmission electron microscopy (TEM) with selected-area electron diffraction (SAED), and scanning electron microscopy (SEM). Increasing pyrolysis temperatures promoted increased crystallization of graphitic wood components and mineral-like phases. The average pore diameter derived from nitrogen adsorption isotherms approximately correlated with the results obtained by high-resolution SEM and TEM. The highest surface area was found for samples containing considerable amounts of nanoperforated pit membranes located in intervascular pitting. High-resolution TEM examinations of membrane regions showed foam-like clusters with an average size of 1.7 nm, which are attributed to the selective influence of CO2 activation on pyrolyzed cellulose and lignin.

PERMEABILITY STUDIES: III. SURFACE AREA MEASUREMENTS OF CARBON BLACKS

1948 ◽  
Vol 26a (2) ◽  
pp. 29-38 ◽  
Author(s):  
J. C. Arnell ◽  
G. O. Henneberry
Keyword(s):  
Electron Microscope ◽  
Low Temperature ◽  
Carbon Black ◽  
Surface Area ◽  
Satisfactory Agreement ◽  
Nitrogen Adsorption ◽  
Average Particle ◽  
Carbon Blacks ◽  
Permeability Studies ◽  
Nitrogen Adsorption Isotherms

The modified Kozeny equation has been found to be satisfactory for the measurement of the specific surfaces of carbon blacks having average particle diameters ranging from 0.01 to 0.1 μ to within ±10%. Comparative data were obtained from electron microscope counting and from low temperature nitrogen adsorption isotherms. The three methods examined gave results that were in satisfactory agreement, except when the carbon black was porous, and then the adsorption value was extremely large.

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