Mesurage du taux d'adsorption/désorption isotherme de vapeur d'eau utilisant la méthode QCM et de sa résistance au transfert de masse d'une couche revêtue de microparticules de gel de silice dans un air humide

Yoshinori Hamamoto, Takehiro Nakamori, Hideo Mori

研究成果: ジャーナルへの寄稿記事

抄録

A quartz crystal microbalance (QCM) technique was used to measure amounts of adsorbed and desorbed water vapor in a moist air to a thin layer of adsorbent consolidated with silica-gel micro particles on the quartz crystal coated with thin gold electrodes. First, measured relative isothermal equilibrium adsorption was confirmed to reproduce the catalogue data of the silica gel. Then, the adsorption and desorption rates to the layer were measured under a condition of a step change of the surrounding relative humidity. Overall mass transfer resistance which related to both the mass diffusion in the particle and the mass transfer in the boundary layer was revealed by the obtained time constants of these reactions. The resistance decreased with the increase of the velocity, and it became a negligible quantity in the boundary layer when the flow rate was above 0.1 m s−1. Finally, correlations were proposed to predict these resistances.

元の言語フランス語
ページ(範囲)11-18
ページ数8
ジャーナルInternational Journal of Refrigeration
105
DOI
出版物ステータス出版済み - 9 1 2019

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Quartz crystal microbalances
Silica gel
Water vapor
Desorption
Boundary layers
Mass transfer
Adsorption
Air
Adsorbents
Quartz
Atmospheric humidity
Gold
Flow rate
Crystals
Electrodes

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Mechanical Engineering

これを引用

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title = "Mesurage du taux d'adsorption/d{\'e}sorption isotherme de vapeur d'eau utilisant la m{\'e}thode QCM et de sa r{\'e}sistance au transfert de masse d'une couche rev{\^e}tue de microparticules de gel de silice dans un air humide",
abstract = "A quartz crystal microbalance (QCM) technique was used to measure amounts of adsorbed and desorbed water vapor in a moist air to a thin layer of adsorbent consolidated with silica-gel micro particles on the quartz crystal coated with thin gold electrodes. First, measured relative isothermal equilibrium adsorption was confirmed to reproduce the catalogue data of the silica gel. Then, the adsorption and desorption rates to the layer were measured under a condition of a step change of the surrounding relative humidity. Overall mass transfer resistance which related to both the mass diffusion in the particle and the mass transfer in the boundary layer was revealed by the obtained time constants of these reactions. The resistance decreased with the increase of the velocity, and it became a negligible quantity in the boundary layer when the flow rate was above 0.1 m s−1. Finally, correlations were proposed to predict these resistances.",
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AU - Mori, Hideo

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AB - A quartz crystal microbalance (QCM) technique was used to measure amounts of adsorbed and desorbed water vapor in a moist air to a thin layer of adsorbent consolidated with silica-gel micro particles on the quartz crystal coated with thin gold electrodes. First, measured relative isothermal equilibrium adsorption was confirmed to reproduce the catalogue data of the silica gel. Then, the adsorption and desorption rates to the layer were measured under a condition of a step change of the surrounding relative humidity. Overall mass transfer resistance which related to both the mass diffusion in the particle and the mass transfer in the boundary layer was revealed by the obtained time constants of these reactions. The resistance decreased with the increase of the velocity, and it became a negligible quantity in the boundary layer when the flow rate was above 0.1 m s−1. Finally, correlations were proposed to predict these resistances.

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