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Experimental studies of air-blast atomization on the CO2 capture with aqueous alkali solutions
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical and Chemical Engineering, Nanjing Tech University, Nanjing, China.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-0200-9960
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical and Chemical Engineering, Nanjing Tech University, Nanjing, China.
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical and Chemical Engineering, Nanjing Tech University, Nanjing, China.
2019 (English)In: Chinese Journal of Chemical Engineering, ISSN 1004-9541, E-ISSN 2210-321XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

In this work, an air-blast atomizing column was used to study the CO2 capture performance with aqueous MEA (mono-ethanol-amine) and NaOH solutions. The effects of gas flow rate, the liquid to gas ratio (L/G), the CO2 concentration on the CO2 removal efficiency (η) and the volumetric overall mass transfer coefficient (KGav) were investigated. The air-blast atomizing column was also compared with the pressure spray tower on the studies of the CO2 capture performance. For the aqueous MEA and NaOH solutions, the experimental results show that the ηdecreases with increasing gas flow rate and CO2 concentration while it increases with increasing L/G. The effects on KGav are more complicated than those for η. When the CO2 concentration is low (3 v/v%), KGav increases with increasing gas flow rate while decreases with increasing L/G. However, when the CO2 concentration is high (9.5 v/v%), as the gas flow rate and L/G increases, KGav increases first and then decreases. The aqueous MEA solution achieves higher η and KGav than the aqueous NaOH solution. The air-blast atomizing column shows a good performance on CO2 capture.

Place, publisher, year, edition, pages
Elsevier, 2019.
Keywords [en]
Air-blast atomizer, CO2 capture, Aqueous alkali solutions
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-73068DOI: 10.1016/j.cjche.2019.01.021OAI: oai:DiVA.org:ltu-73068DiVA, id: diva2:1292582
Available from: 2019-02-28 Created: 2019-02-28 Last updated: 2019-02-28

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Li, ZhengJi, Xiaoyan

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