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20241231232442.0 |
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241231s2024 xx |||||o 00| ||eng c |
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|a 10.1080/09593330.2024.2445328
|2 doi
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|a pubmed24n1647.xml
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|a (DE-627)NLM382238826
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|a (NLM)39737910
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Obidi, Peter Ofuje
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Use of rotating membranes for air-to-liquid mass transfer of carbon dioxide to enhance algal growth
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 31.12.2024
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|a published: Print-Electronic
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|a Citation Status Publisher
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|a A novel air-to-liquid mass transfer system using wetted rotating membranes was designed to enhance air-to-liquid carbon dioxide (CO2) mass transfer efficiency. Traditional methods, such as sparging, are energy-intensive, but the rotating membrane reduces energy demands by optimising membrane wetting via rotational motion. Experimental tests were conducted using a small-scale system with a membrane width of 0.64 m and loop size of 2 to 5 m, with rotational speeds between 0.0 and 0.78 m/s. CO2 flux increased by up to 45%, achieving maximum uptake rate of 9.14 mg CO2/min/m2 at 100% speed. An empirical model was developed to predict mass transfer rates under varying operational conditions, and model validation showed a strong correlation with experimental data (R2 = 0.9668). Preliminary techno-economic analysis estimated that scaling the system to meet the CO2 demands of a hypothetical 500,000 L raceway, 915 membranes would be required, utilising ∼223 m2 (13.4%) of 1667 m2 surface area, assuming a 0.3 m depth, 12 g/m2/day growth rate, and algae with 50% carbon by weight. The system's energy consumption was measured at 17.1 J/g CO2 captured, representing a 90% reduction in power usage compared to conventional sparging systems, which typically require ∼627 W per 8.3 m2 of membrane surface area. Based solely on electricity costs of $0.10/kW-hr, the cost of capturing atmospheric CO2 was estimated at $1550 per ton. This marks a significant improvement over existing technologies, enhancing commercial viability. Future work will validate the system with Chlorella vulgaris and scale to optimise CO2 capture and reduce costs
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|a Journal Article
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|a Algal growth
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|a carbon dioxide capture
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|a mass transfer
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|a techno-economic analysis
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| 650 |
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|a wetted rotating membranes
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1 |
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|a Lunka, Alex A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Fallahi, Alireza
|e verfasserin
|4 aut
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| 700 |
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|a Bayless, David J
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Environmental technology
|d 1993
|g (2024) vom: 31. Dez., Seite 1-19
|w (DE-627)NLM098202545
|x 1479-487X
|7 nnns
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| 773 |
1 |
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|g year:2024
|g day:31
|g month:12
|g pages:1-19
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|u http://dx.doi.org/10.1080/09593330.2024.2445328
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