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Effect of pore blockage on adsorption isotherms and dynamics: Anomalous adsorption of iodine on activated carbon

DSpace at IIT Bombay

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Field Value
 
Title Effect of pore blockage on adsorption isotherms and dynamics: Anomalous adsorption of iodine on activated carbon
 
Creator BHATIA, SK
LIU, F
ARVIND, G
 
Subject transport
kinetics
solids
 
Description Isotherm hysteresis and pore-blocking effects of trapped molecules on adsorption dynamics is studied here, using the iodine-carbon system in the 300-343 K temperature range. It is found that a portion of the iodine is strongly adsorbed, and does not desorb, even over very long time scales, while the remainder adsorbs reversibly as a homogeneous monolayer with a Langmuirian isotherm in mesopores. The strongly adsorbed iodine appears to adsorb in micropores and at the mesopore mouths, hindering uptake of the reversible iodine. The uptake data for the adsorption and desorption dynamics of the reversible part is found to be best explained by means of a pore mouth resistance control mechanism. It is concluded that the dynamics of the adsorption and desorption at the pore mouth is important at early stages of the process.
 
Publisher AMER CHEMICAL SOC
 
Date 2011-07-14T00:18:48Z
2011-12-26T12:47:27Z
2011-12-27T05:34:34Z
2011-07-14T00:18:48Z
2011-12-26T12:47:27Z
2011-12-27T05:34:34Z
2000
 
Type Article
 
Identifier LANGMUIR, 16(8), 4001-4008
0743-7463
http://dx.doi.org/10.1021/la991418h
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3808
http://hdl.handle.net/10054/3808
 
Language en