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Low energy packed t...
Low energy packed tower and caustic recovery for direct capture of CO2 from air
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- Mahmoudkhani, Maryam, 1971 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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Keith, David W (author)
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Heidel, Kenton H. (author)
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Ferreira, Julian C (author)
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Cherry, Robert S. (author)
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(creator_code:org_t)
- 2009
- 2009
- English.
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In: Energy Procedia. - 1876-6102. ; 1:1, s. 1535-1542
- Related links:
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https://research.cha...
Abstract
Subject headings
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- We used a 6.5 m tall packed tower prototype to study the capturing rate of CO2 from air. The tower was operated at a pressure drop of less than 27 pa in the packing at 0.7m/sec air speed with a counter current flow mode and with NaOH or KOH solution as the absorbent. The tower consumed an average of ~30 kJe per mole CO2. We found that via an intermittent operation with a 5% duty cycle, the fluid pumping work reduced by 90%. A novel process for removing carbonates ions from alkaline solutions based on titanate compounds is compared to the traditional lime cycle for the caustic recovery. The titanate process reduces the high-grade heat requirement by ~50%. The results from experimental data of leaching andprecipitation test support process design of the titanate cycle. In this paper, we also present the chemical process design.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
Keyword
- air capture
- titanate
- precipitation
- packed tower
- direct causticization
- leaching
Publication and Content Type
- art (subject category)
- ref (subject category)
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