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CO2 capture through direct-contact condensation in a spray ejector condenser and T- junction separator
Abstract
The design principle underlying the steam condensation and CO2 purification in a gas power plant with a focus on reducing CO2 emissions encompasses the deployment of a spray ejector condenser (SEC) and separator. This innovative system facilitates direct-contact condensation of steam with non-condensable gas (CO2) by inter acting with a spray of subcooled water, seamlessly integrated with a T-junction separator mechanism aimed at yielding pure CO2. Because of decreased convective heat transfer and heightened diffusion resistance between the subcooled water and steam phases caused by CO2, the research examined the effects of various thermo physical parameters of the injected water, specifically temperature (20–40 with Steam Mass Flow Rates (2.2–4.6 g s ◦ C) and pressure (12–16 bar) along ) to improve heat transfer rates within the SEC. The SEC utilizes a Eulerian- Eulerian multiphase model, wherein water is considered the continuous phase while the mixture of steam and CO2 constitutes the dispersed phase. Turbulence within the ejector is represented applying standard k model. Furthermore, the separator employs turbulence and operates in three dimensions using the control volume method. The simulation of turbulent two-phase flow in the gas-liquid T-junction separator is conducted utilizing K standard ε ε turbulence model and a mixture model. The results imply that the maximum temperature difference (ΔT) between inlet and outlet of SEC is observed when the steam mass flow rate is 2.2 (g/s) without CO2, while the presence of CO2 leads to a reduction in ΔT. Additionally, the performance of the SEC is notably affected by the optimal settings of water temperature and pressure, where lower coolant water temperatures (20 ◦ C) and higher water pressures (16 bar) contribute to improved condensation performance. Furthermore, the study ex plores the decrease in separation efficiency associated with elevated inlet mass flow rate, attributed to maldis tribution in the vertical impact T-junction separator.
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Authors (5)
-
Jaroslaw Mikielewicz Prof
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
no. 156,
ISSN: 0735-1933 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Amiri M., Klugmann M., Mikielewicz J., Ziółkowski P., Mikielewicz D.: CO2 capture through direct-contact condensation in a spray ejector condenser and T- junction separator// INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER -Vol. 156, (2024), s.107596-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.icheatmasstransfer.2024.107596
- Sources of funding:
-
- COST_FREE
- Verified by:
- Gdańsk University of Technology
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