Numerical analysis of O2 concentration, gas-zeolite temperatures in two zeolite columns for an oxygen concentrator

Kuniyasu Ogawa; Yosuke Inagaki; Akio Ohno

doi:10.1016/j.ijheatmasstransfer.2018.09.052

Numerical analysis of O₂ concentration, gas-zeolite temperatures in two zeolite columns for an oxygen concentrator

Kuniyasu Ogawa, Yosuke Inagaki, Akio Ohno

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

In order to improve the performance of a compact adsorption-type oxygen concentrator, it is necessary to develop an analytical method for a compact concentrator having two zeolite columns of 15–30 cm length. A method which computes the velocity of gas flowing through the zeolite column was developed by assuming that the total gas pressure over the entire area of the column is spatially uniform during pressure swing adsorption (PSA) operation. The energy conservation equation for gas includes flow work and gas enthalpy transport which occurs when gas adsorbs/desorbs at a surface of a zeolite particle. Spatial distributions of gas velocity, oxygen concentration, and gas-zeolite temperatures were analyzed numerically using these equations. The numerical results of the time dependent changes in the discharged oxygen concentration and the temperature distribution of the zeolite column were in agreement with experiment.

Original language	English
Pages (from-to)	238-254
Number of pages	17
Journal	International Journal of Heat and Mass Transfer
Volume	129
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2018.09.052
Publication status	Published - 2019 Feb

Keywords

Adsorption
Gas separation
Modeling
Numerical analysis
Temperature distribution

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ijheatmasstransfer.2018.09.052

Cite this

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title = "Numerical analysis of O2 concentration, gas-zeolite temperatures in two zeolite columns for an oxygen concentrator",

abstract = "In order to improve the performance of a compact adsorption-type oxygen concentrator, it is necessary to develop an analytical method for a compact concentrator having two zeolite columns of 15–30 cm length. A method which computes the velocity of gas flowing through the zeolite column was developed by assuming that the total gas pressure over the entire area of the column is spatially uniform during pressure swing adsorption (PSA) operation. The energy conservation equation for gas includes flow work and gas enthalpy transport which occurs when gas adsorbs/desorbs at a surface of a zeolite particle. Spatial distributions of gas velocity, oxygen concentration, and gas-zeolite temperatures were analyzed numerically using these equations. The numerical results of the time dependent changes in the discharged oxygen concentration and the temperature distribution of the zeolite column were in agreement with experiment.",

keywords = "Adsorption, Gas separation, Modeling, Numerical analysis, Temperature distribution",

author = "Kuniyasu Ogawa and Yosuke Inagaki and Akio Ohno",

note = "Funding Information: The authors wish to thank Dr. Takao Nagasaki for advice with the numerical analysis technique, Mr. Satoshi Nakagawa for advice based on his knowledge of compact adsorption-type oxygen concentrators, and Mr. Kentaro Yamada for advice on the suitable diffusion coefficient to use in a packed bed. Ikiken Corporation kindly manufactured the compact adsorption-type oxygen concentrator to specifications particular to this research. This work was supported by JSPS KAKENHI Grant Number 24300086 . Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

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doi = "10.1016/j.ijheatmasstransfer.2018.09.052",

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AU - Ogawa, Kuniyasu

AU - Inagaki, Yosuke

AU - Ohno, Akio

N1 - Funding Information: The authors wish to thank Dr. Takao Nagasaki for advice with the numerical analysis technique, Mr. Satoshi Nakagawa for advice based on his knowledge of compact adsorption-type oxygen concentrators, and Mr. Kentaro Yamada for advice on the suitable diffusion coefficient to use in a packed bed. Ikiken Corporation kindly manufactured the compact adsorption-type oxygen concentrator to specifications particular to this research. This work was supported by JSPS KAKENHI Grant Number 24300086 . Publisher Copyright: © 2018 Elsevier Ltd

PY - 2019/2

Y1 - 2019/2

N2 - In order to improve the performance of a compact adsorption-type oxygen concentrator, it is necessary to develop an analytical method for a compact concentrator having two zeolite columns of 15–30 cm length. A method which computes the velocity of gas flowing through the zeolite column was developed by assuming that the total gas pressure over the entire area of the column is spatially uniform during pressure swing adsorption (PSA) operation. The energy conservation equation for gas includes flow work and gas enthalpy transport which occurs when gas adsorbs/desorbs at a surface of a zeolite particle. Spatial distributions of gas velocity, oxygen concentration, and gas-zeolite temperatures were analyzed numerically using these equations. The numerical results of the time dependent changes in the discharged oxygen concentration and the temperature distribution of the zeolite column were in agreement with experiment.

AB - In order to improve the performance of a compact adsorption-type oxygen concentrator, it is necessary to develop an analytical method for a compact concentrator having two zeolite columns of 15–30 cm length. A method which computes the velocity of gas flowing through the zeolite column was developed by assuming that the total gas pressure over the entire area of the column is spatially uniform during pressure swing adsorption (PSA) operation. The energy conservation equation for gas includes flow work and gas enthalpy transport which occurs when gas adsorbs/desorbs at a surface of a zeolite particle. Spatial distributions of gas velocity, oxygen concentration, and gas-zeolite temperatures were analyzed numerically using these equations. The numerical results of the time dependent changes in the discharged oxygen concentration and the temperature distribution of the zeolite column were in agreement with experiment.

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KW - Gas separation

KW - Modeling

KW - Numerical analysis

KW - Temperature distribution

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