CO2 separation from offshore natural gas in quiescent and flowing states using 13X zeolite

Chen, S, Tao, Z, Fu, Y, Zhu, M, Li, W and Li, X 2017, 'CO2 separation from offshore natural gas in quiescent and flowing states using 13X zeolite', Applied Energy, vol. 205, pp. 1435-1446.


Document type: Journal Article
Collection: Journal Articles

Title CO2 separation from offshore natural gas in quiescent and flowing states using 13X zeolite
Author(s) Chen, S
Tao, Z
Fu, Y
Zhu, M
Li, W
Li, X
Year 2017
Journal name Applied Energy
Volume number 205
Start page 1435
End page 1446
Total pages 12
Publisher Elsevier
Abstract To improve the efficiency of offshore natural gas exploitation, CO 2 separation from offshore natural gas in quiescent and flowing states using 13X zeolite was studied systematically by examining the voidage, adsorption time, inlet velocity, adsorber diameter, temperature, and pressure. An adsorption purification model was established and validated based on the experimental data. In quiescent adsorption, the contact area between 13X zeolite and the gas mixture is the most important factor for evaluating the adsorption purification efficiency, and higher voidages in the range of 0.25-0.50 were favorable for gas adsorption. However, in addition to the contact area, the contact time is an important factor for flowing adsorption. The purification efficiency of flowing adsorption is highest at a voidage of 0.35. At this voidage, the pressure drop in the adsorber was 70 Pa. The stabilization time for adsorption equilibrium decreased with increasing inlet velocity. As the adsorption time increased, the adsorption heat at different axial lengths of the adsorber tended to reach a constant value, while a symmetric adsorption heat curve was observed at different radial lengths. Toward the reduction of the energy consumption in the adsorption process, the optimum adsorber lengths for different diameters, temperatures, and pressures were determined. Adsorption purification was enhanced with increasing temperature. Further, it could also be improved by an appropriate pressure. Optimization of the adsorber structure par ameters and regulation of the state parameters during the adsorption process are important for reducing energy consumption and improving the purification efficiency. The findings of this study serve as a guide for setting the purification parameters for CO 2 separation from offshore natural gas in engineering applications.
Subject Engineering not elsewhere classified
Economics not elsewhere classified
Keyword(s) 13X zeolite
Adsorption heat
Flowing adsorption
Offshore natural gas
Quiescent adsorption
Voidage
DOI - identifier 10.1016/j.apenergy.2017.09.084
Copyright notice Crown Copyright © 2017 Published by Elsevier Ltd. All rights reserved.
ISSN 0306-2619
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