TY - JOUR
T1 - Water vapor sorption kinetics of polymer based sorbents
T2 - Theory and experiments
AU - Sultan, Muhammad
AU - El-Sharkawy, Ibrahim I.
AU - Miyazaki, Takahiko
AU - Saha, Bidyut B.
AU - Koyama, Shigeru
AU - Maruyama, Tomohiro
AU - Maeda, Shinnosuke
AU - Nakamura, Takashi
N1 - Funding Information:
This work was supported by TherMAT project, Japan Ministry of Economy, Trade and Industry (METI).
Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2016/8/5
Y1 - 2016/8/5
N2 - Water vapor sorption kinetics of two polymer based sorbents has been experimentally measured at adsorption temperatures of 20, 30, 50, 70 and 80 °C using a magnetic suspension adsorption measurement unit. The experimental data is employed to commonly known adsorption kinetics approximations i.e. Linear driving force (LDF) model, Fickian diffusion (FD) model, and Semi-infinite model. All these models could not approximate the adsorption kinetics of polymer based sorbents, however, the LDF model is modified which successfully predicts the experimental kinetics for short-time and long-time estimation. For both sorbents, the diffusion time constant has been calculated at each adsorption temperature, and consequently, activation energy and pre-exponential constant are found from Arrhenius plot. The variation of diffusion time constant with relative pressure and adsorption temperature is discussed in relation with typical behavior of polymer/water pairs.
AB - Water vapor sorption kinetics of two polymer based sorbents has been experimentally measured at adsorption temperatures of 20, 30, 50, 70 and 80 °C using a magnetic suspension adsorption measurement unit. The experimental data is employed to commonly known adsorption kinetics approximations i.e. Linear driving force (LDF) model, Fickian diffusion (FD) model, and Semi-infinite model. All these models could not approximate the adsorption kinetics of polymer based sorbents, however, the LDF model is modified which successfully predicts the experimental kinetics for short-time and long-time estimation. For both sorbents, the diffusion time constant has been calculated at each adsorption temperature, and consequently, activation energy and pre-exponential constant are found from Arrhenius plot. The variation of diffusion time constant with relative pressure and adsorption temperature is discussed in relation with typical behavior of polymer/water pairs.
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U2 - 10.1016/j.applthermaleng.2016.05.192
DO - 10.1016/j.applthermaleng.2016.05.192
M3 - Article
AN - SCOPUS:84989934774
VL - 106
SP - 192
EP - 202
JO - Journal of Heat Recovery Systems
JF - Journal of Heat Recovery Systems
SN - 1359-4311
ER -