Journal
CHEMICAL ENGINEERING RESEARCH & DESIGN
Volume 156, Issue -, Pages 131-137Publisher
ELSEVIER
DOI: 10.1016/j.cherd.2020.01.031
Keywords
Gas hydrate; Gas absorption; Gas separation; Volumetric mass transfer coefficient; R134a
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Funding
- Japan Societyfor the Promotion of Science (JSPS KAKENHI) [JP16K06821]
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As a means of assessing the viability of hydrate-based gas separation, this study examined the gas absorption performance of a flow-type gas-liquid contact device with static mixing. Assuming for the sake of simplification that the hydrate-based gas uptake occurred as a result of pseudo gas-liquid contact in a bubble-hydrate slurry solution, overall liquid side volumetric mass transfer coefficients were determined. An R134a-N-2 mixture was used as a model gas because the corresponding hydrate readily forms under low pressure/high temperature conditions. At 0.325 MPa and 278 K, the average coefficients were determined to be in the range of 0.088-0.142 s(-1). These values were more than ten times greater than those obtained from simple gas dissolution. The results of this work suggest that hydrate-based systems are preferable for the purpose of gas absorption and separation. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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