Membrane absorption of separating supercritical carbon dioxide and vapor in geothermal energy utilization based on lattice Boltzmann modeling

Youfei Tang, Zongliang Qiao, Yue Cao, Chengbin Zhang and Fengqi Si

Energy, 2025, vol. 329, issue C

Abstract: Supercritical carbon dioxide exhibits potential as a working fluid for electricity generation utilizing geothermal energy, even in the presence of vapor within the reservoir mixture. A membrane absorption separator has been designed to separate the vapor from the mixture and purify the carbon dioxide. To simulate the two-phase flow of the gas mixture and absorption liquid, the multicomponent multiphase lattice Boltzmann method is employed. This method is coupled with the interfacial continuous species transfer model for salt diffusion in liquid water to investigate pore-scale factors influencing vapor absorption. The modeling approach offers detailed insights into the membrane absorption process. Simulation results indicate that strategies to reduce mass transfer resistance, such as increasing porosity, enhancing hydrophobicity, and decreasing membrane thickness, significantly enhance absorption efficiency. Conversely, methods to increase the mass transfer driving force, including elevating the concentration of the absorbing solution, increasing its thickness, and decreasing the gas thickness, provide limited improvements in efficiency compared to the aforementioned strategies. Among the factors examined, membrane porosity emerges as the most significant.

Keywords: Supercritical carbon dioxide; Membrane absorption; Multicomponent multiphase flow; Lattice Boltzmann method; Continuous species transfer (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544225023655
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:329:y:2025:i:c:s0360544225023655

DOI: 10.1016/j.energy.2025.136723

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().