Adsorption equilibrium, kinetics, and enthalpy of N2O on zeolite 4A and 13X

Dipendu Saha; Shuguang Deng

doi:10.1021/je100105z

Adsorption equilibrium, kinetics, and enthalpy of N₂O on zeolite 4A and 13X

Dipendu Saha, Shuguang Deng

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Abstract

The adsorption equilibrium, kinetics, and enthalpy of nitrous oxide adsorption on zeolites 4A and 13X were measured volumetrically at temperatures of (194, 237, and 298) K and gas pressure up to 108 kPa. It was found that zeolite 4A adsorbs more N₂O than 13X in all of the conditions used. The Langmuir, Freundlich, and Toth isotherm models were employed to correlate the adsorption isotherms. N₂O diffusivity in these adsorbents at 298 K was calculated from the adsorption kinetic uptake curves by using a simple micropore diffusion model. It was found that the average diffusivity values in zeolite 4A and 13X are (3.38·10^-14 and 1.05·10 ^-12) m²·s^-1, respectively. The heat of adsorption values are between (-33 and -21) kJ·mol^-1 for zeolite 4A and (-28 and -22) kJ·mol^-1 for 13X for adsorption loadings between (0.5 and 3.5) mmol·g^-1.

Original language	English (US)
Pages (from-to)	3312-3317
Number of pages	6
Journal	Journal of Chemical and Engineering Data
Volume	55
Issue number	9
DOIs	https://doi.org/10.1021/je100105z
State	Published - Sep 9 2010
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

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title = "Adsorption equilibrium, kinetics, and enthalpy of N2O on zeolite 4A and 13X",

abstract = "The adsorption equilibrium, kinetics, and enthalpy of nitrous oxide adsorption on zeolites 4A and 13X were measured volumetrically at temperatures of (194, 237, and 298) K and gas pressure up to 108 kPa. It was found that zeolite 4A adsorbs more N2O than 13X in all of the conditions used. The Langmuir, Freundlich, and Toth isotherm models were employed to correlate the adsorption isotherms. N2O diffusivity in these adsorbents at 298 K was calculated from the adsorption kinetic uptake curves by using a simple micropore diffusion model. It was found that the average diffusivity values in zeolite 4A and 13X are (3.38·10-14 and 1.05·10 -12) m2·s-1, respectively. The heat of adsorption values are between (-33 and -21) kJ·mol-1 for zeolite 4A and (-28 and -22) kJ·mol-1 for 13X for adsorption loadings between (0.5 and 3.5) mmol·g-1.",

author = "Dipendu Saha and Shuguang Deng",

year = "2010",

month = sep,

day = "9",

doi = "10.1021/je100105z",

language = "English (US)",

volume = "55",

pages = "3312--3317",

journal = "Journal of Chemical and Engineering Data",

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T1 - Adsorption equilibrium, kinetics, and enthalpy of N2O on zeolite 4A and 13X

AU - Saha, Dipendu

AU - Deng, Shuguang

PY - 2010/9/9

Y1 - 2010/9/9

N2 - The adsorption equilibrium, kinetics, and enthalpy of nitrous oxide adsorption on zeolites 4A and 13X were measured volumetrically at temperatures of (194, 237, and 298) K and gas pressure up to 108 kPa. It was found that zeolite 4A adsorbs more N2O than 13X in all of the conditions used. The Langmuir, Freundlich, and Toth isotherm models were employed to correlate the adsorption isotherms. N2O diffusivity in these adsorbents at 298 K was calculated from the adsorption kinetic uptake curves by using a simple micropore diffusion model. It was found that the average diffusivity values in zeolite 4A and 13X are (3.38·10-14 and 1.05·10 -12) m2·s-1, respectively. The heat of adsorption values are between (-33 and -21) kJ·mol-1 for zeolite 4A and (-28 and -22) kJ·mol-1 for 13X for adsorption loadings between (0.5 and 3.5) mmol·g-1.

AB - The adsorption equilibrium, kinetics, and enthalpy of nitrous oxide adsorption on zeolites 4A and 13X were measured volumetrically at temperatures of (194, 237, and 298) K and gas pressure up to 108 kPa. It was found that zeolite 4A adsorbs more N2O than 13X in all of the conditions used. The Langmuir, Freundlich, and Toth isotherm models were employed to correlate the adsorption isotherms. N2O diffusivity in these adsorbents at 298 K was calculated from the adsorption kinetic uptake curves by using a simple micropore diffusion model. It was found that the average diffusivity values in zeolite 4A and 13X are (3.38·10-14 and 1.05·10 -12) m2·s-1, respectively. The heat of adsorption values are between (-33 and -21) kJ·mol-1 for zeolite 4A and (-28 and -22) kJ·mol-1 for 13X for adsorption loadings between (0.5 and 3.5) mmol·g-1.

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Adsorption equilibrium, kinetics, and enthalpy of N₂O on zeolite 4A and 13X

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