Abstract
The oxygen concentration discharged from a compact adsorption-type oxygen concentrator decreases when water attaches to the zeolite particles used as a nitrogen adsorbent. In order to estimate the expansion of the water adsorption region in the zeolite column, it is necessary to measure the water diffusion occurring in a zeolite column after stopping PSA (Pressure Swing Adsorption) operations. Li-X type zeolite particles (molecular sieve OXYSIV-700) with particle diameters in the range of approximately 0.4–0.5 mm were used as a nitrogen adsorbent column of length 157 mm and of inner diameter 33 mm. By comparing the water concentration distributions obtained from MR (Magnetic Resonance) images and the distributions calculated by analytical solution of a one-dimensional diffusion equation under transient conditions, the counter diffusion coefficient of water absorbing on zeolite particles in the column was determined. The apparent diffusion coefficient of water absorbing on the zeolite particles moving into the zeolite column with macroscale pores was determined to be 1.25 ± 0.15 × 10−11 m2/s.
| Original language | English |
|---|---|
| Pages (from-to) | 889-896 |
| Number of pages | 8 |
| Journal | Chemical Engineering Journal |
| Volume | 306 |
| DOIs | |
| Publication status | Published - 2016 Dec 15 |
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Keywords
- Adsorption-type oxygen concentrator
- Li-X type zeolite
- Magnetic Resonance Images
- Packed column
- Water diffusion coefficient
ASJC Scopus subject areas
- Chemistry(all)
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering
Cite this
The apparent counter diffusion coefficient of water absorbing on zeolite particles in the case of the water moving through macro-size pores in a column packed with zeolite particles. / Ogawa, Kuniyasu; Inagaki, Yosuke.
In: Chemical Engineering Journal, Vol. 306, 15.12.2016, p. 889-896.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The apparent counter diffusion coefficient of water absorbing on zeolite particles in the case of the water moving through macro-size pores in a column packed with zeolite particles
AU - Ogawa, Kuniyasu
AU - Inagaki, Yosuke
PY - 2016/12/15
Y1 - 2016/12/15
N2 - The oxygen concentration discharged from a compact adsorption-type oxygen concentrator decreases when water attaches to the zeolite particles used as a nitrogen adsorbent. In order to estimate the expansion of the water adsorption region in the zeolite column, it is necessary to measure the water diffusion occurring in a zeolite column after stopping PSA (Pressure Swing Adsorption) operations. Li-X type zeolite particles (molecular sieve OXYSIV-700) with particle diameters in the range of approximately 0.4–0.5 mm were used as a nitrogen adsorbent column of length 157 mm and of inner diameter 33 mm. By comparing the water concentration distributions obtained from MR (Magnetic Resonance) images and the distributions calculated by analytical solution of a one-dimensional diffusion equation under transient conditions, the counter diffusion coefficient of water absorbing on zeolite particles in the column was determined. The apparent diffusion coefficient of water absorbing on the zeolite particles moving into the zeolite column with macroscale pores was determined to be 1.25 ± 0.15 × 10−11 m2/s.
AB - The oxygen concentration discharged from a compact adsorption-type oxygen concentrator decreases when water attaches to the zeolite particles used as a nitrogen adsorbent. In order to estimate the expansion of the water adsorption region in the zeolite column, it is necessary to measure the water diffusion occurring in a zeolite column after stopping PSA (Pressure Swing Adsorption) operations. Li-X type zeolite particles (molecular sieve OXYSIV-700) with particle diameters in the range of approximately 0.4–0.5 mm were used as a nitrogen adsorbent column of length 157 mm and of inner diameter 33 mm. By comparing the water concentration distributions obtained from MR (Magnetic Resonance) images and the distributions calculated by analytical solution of a one-dimensional diffusion equation under transient conditions, the counter diffusion coefficient of water absorbing on zeolite particles in the column was determined. The apparent diffusion coefficient of water absorbing on the zeolite particles moving into the zeolite column with macroscale pores was determined to be 1.25 ± 0.15 × 10−11 m2/s.
KW - Adsorption-type oxygen concentrator
KW - Li-X type zeolite
KW - Magnetic Resonance Images
KW - Packed column
KW - Water diffusion coefficient
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U2 - 10.1016/j.cej.2016.07.083
DO - 10.1016/j.cej.2016.07.083
M3 - Article
VL - 306
SP - 889
EP - 896
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
ER -