The kinetics of the isothermal adsorption of ethanol from an aqueous solution onto a hydrophobic zeolite of the NaZSM-5 type in the temperature range 298-333 K was investigated. Specific shape parameters of the adsorption degree curves were determined. The changes in the specific shape parameters of the adsorption degree curves with temperature were determined. The kinetic parameters of ethanol adsorption (E-a, ln A) were determined by the initial rate, the saturation rate and the maximum rate methods as well as from the Johnson, Mehl and Avramy equation. The kinetic model of ethanol adsorption kt=[1-(1-alpha)(1/3)] was determined by the "model fitting" method. Ethanol adsorption from aqueous solution onto NaZSM-5 is a kinetically controlled process limited by the rate of three-dimensional movement of the boundary layer of the adsorption phase. A model for the mechanism of ethanol adsorption onto NaZSM-5 is suggested on the basis of the kinetic model. Ethanol molecules in aqueous solut...ion are associated in clusters. The activation energy of the adsorption process corresponds to the energy required for the detachment of an ethanol molecule from a cluster and its adsorption onto the zeolite.
Keywords:
kinetics / ethanol / aqueous phase / NaZSM-5
Source:
Adsorption-Journal of the International Adsorption Society, 2008, 14, 1, 123-131
TY - JOUR
AU - Adnađević, Borivoj K.
AU - Mojović, Zorica
AU - Abu Rabi, Andjela
PY - 2008
UR - http://cer.ihtm.bg.ac.rs/handle/123456789/414
AB - The kinetics of the isothermal adsorption of ethanol from an aqueous solution onto a hydrophobic zeolite of the NaZSM-5 type in the temperature range 298-333 K was investigated. Specific shape parameters of the adsorption degree curves were determined. The changes in the specific shape parameters of the adsorption degree curves with temperature were determined. The kinetic parameters of ethanol adsorption (E-a, ln A) were determined by the initial rate, the saturation rate and the maximum rate methods as well as from the Johnson, Mehl and Avramy equation. The kinetic model of ethanol adsorption kt=[1-(1-alpha)(1/3)] was determined by the "model fitting" method. Ethanol adsorption from aqueous solution onto NaZSM-5 is a kinetically controlled process limited by the rate of three-dimensional movement of the boundary layer of the adsorption phase. A model for the mechanism of ethanol adsorption onto NaZSM-5 is suggested on the basis of the kinetic model. Ethanol molecules in aqueous solution are associated in clusters. The activation energy of the adsorption process corresponds to the energy required for the detachment of an ethanol molecule from a cluster and its adsorption onto the zeolite.
PB - Springer, New York
T2 - Adsorption-Journal of the International Adsorption Society
T1 - The kinetics of ethanol adsorption from the aqueous phase onto zeolite NaZSM-5
VL - 14
IS - 1
SP - 123
EP - 131
DO - 10.1007/s10450-007-9077-6
ER -
@article{
author = "Adnađević, Borivoj K. and Mojović, Zorica and Abu Rabi, Andjela",
year = "2008",
url = "http://cer.ihtm.bg.ac.rs/handle/123456789/414",
abstract = "The kinetics of the isothermal adsorption of ethanol from an aqueous solution onto a hydrophobic zeolite of the NaZSM-5 type in the temperature range 298-333 K was investigated. Specific shape parameters of the adsorption degree curves were determined. The changes in the specific shape parameters of the adsorption degree curves with temperature were determined. The kinetic parameters of ethanol adsorption (E-a, ln A) were determined by the initial rate, the saturation rate and the maximum rate methods as well as from the Johnson, Mehl and Avramy equation. The kinetic model of ethanol adsorption kt=[1-(1-alpha)(1/3)] was determined by the "model fitting" method. Ethanol adsorption from aqueous solution onto NaZSM-5 is a kinetically controlled process limited by the rate of three-dimensional movement of the boundary layer of the adsorption phase. A model for the mechanism of ethanol adsorption onto NaZSM-5 is suggested on the basis of the kinetic model. Ethanol molecules in aqueous solution are associated in clusters. The activation energy of the adsorption process corresponds to the energy required for the detachment of an ethanol molecule from a cluster and its adsorption onto the zeolite.",
publisher = "Springer, New York",
journal = "Adsorption-Journal of the International Adsorption Society",
title = "The kinetics of ethanol adsorption from the aqueous phase onto zeolite NaZSM-5",
volume = "14",
number = "1",
pages = "123-131",
doi = "10.1007/s10450-007-9077-6"
}
Adnađević, B. K., Mojović, Z.,& Abu Rabi, A. (2008). The kinetics of ethanol adsorption from the aqueous phase onto zeolite NaZSM-5.
Adsorption-Journal of the International Adsorption Society
Springer, New York., 14(1), 123-131.
https://doi.org/10.1007/s10450-007-9077-6
Adnađević BK, Mojović Z, Abu Rabi A. The kinetics of ethanol adsorption from the aqueous phase onto zeolite NaZSM-5. Adsorption-Journal of the International Adsorption Society. 2008;14(1):123-131
Adnađević Borivoj K., Mojović Zorica, Abu Rabi Andjela, "The kinetics of ethanol adsorption from the aqueous phase onto zeolite NaZSM-5" Adsorption-Journal of the International Adsorption Society, 14, no. 1 (2008):123-131,
https://doi.org/10.1007/s10450-007-9077-6 .
