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

Kuniyasu Ogawa, Yosuke Inagaki

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 languageEnglish
Pages (from-to)889-896
Number of pages8
JournalChemical Engineering Journal
Volume306
DOIs
Publication statusPublished - 2016 Dec 15

Fingerprint

Zeolites
zeolite
Pore size
Macros
Water
Adsorption
water
Adsorbents
adsorption
Nitrogen
Oxygen
Molecular sieves
oxygen
Magnetic resonance
nitrogen
particle

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

@article{22c9278b02f5446fbaa8738fb3917b6b,
title = "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",
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.",
keywords = "Adsorption-type oxygen concentrator, Li-X type zeolite, Magnetic Resonance Images, Packed column, Water diffusion coefficient",
author = "Kuniyasu Ogawa and Yosuke Inagaki",
year = "2016",
month = "12",
day = "15",
doi = "10.1016/j.cej.2016.07.083",
language = "English",
volume = "306",
pages = "889--896",
journal = "Chemical Engineering Journal",
issn = "1385-8947",
publisher = "Elsevier",

}

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

UR - http://www.scopus.com/inward/record.url?scp=84989927115&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84989927115&partnerID=8YFLogxK

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 -