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Carbon dioxide separation by disc stack centrifuge at low CO2 concentration
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.
2022 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Koldioxid separaring via staplad disk centrifug vid låg CO2 halt (Swedish)
Abstract [sv]

Medan världen undergår en klimatkris, nya sätt för att mildra den har undersökts till det korta och långa loppet. Koldioxid är ett ämne som uppmärksammats då stora mängder av den släpps ut till atmosfären på grund av förbränningsprocesser. Då detta sker, ett sätt för att mildra klimatomställningen är genom ”Carbon Capture and Storage”, CCS. Det finns redan metoder för att fånga och separera CO2, genom exempelvis roterande packade säng eller vattnade vägg kolumner. Dock har staplade disk centrifug inte undersökts. Denna rapport har undersökt och använt en staplad disk centrifug för just koldioxid separering, genom användning av vatten och NaOH-lösning som absorbenter. Några parametrar har varierats såsom koncentrationen på NaOH-lösningen, luftflödeshastighet och koldioxid koncentration. Resultaten visade att användning av en staplad disk centrifug separerade inte märkvärdiga mängder av CO2. Det hittades däremot förklaringar till detta och det var att den låga halten CO2, de begränsade mätinstrumenten och det experimentella uppställningen som ej gav tid för absorption att ske.

Abstract [en]

As the world is going through a climate crisis, ways to mitigate it in the short and long term have been investigated. Carbon dioxide is a molecule of importance due to the amounts that are freely emitted into the atmosphere because of combustion processes. Due to this, one way of many, to mitigate climate change is Carbon capture and storage, CCS. There are also consequently several ways to capture and separate CO2 in post combustion processes, such as the use of rotating packed beds or wetted wall columns, however the use of disc stack centrifuges has not been investigated for this application. This paper has investigated and used a disc stack centrifuge for this purpose, by using water and NaOH solution as aerosol absorbents. Some parameters have been varied such as NaOH concentration, air flow speed and carbon dioxide concentration.  Results had shown that the use of a disc stack centrifuge did not yield considerable CO2 separation, however, an explanation for this was found to be due to low CO2 concentration and limited measuring instruments as well as a setup that did not make it possible for absorbent and CO2 to fully react and be efficiently separated.

Place, publisher, year, edition, pages
2022.
Series
TRITA-CBH-GRU ; 2022:268
Keywords [en]
CO2, Absorption, CCS, Separation, ”Disc Stack Centrifuge”
Keywords [sv]
CO2, Absorption, CCS, Separering, ”Staplad Disk Centrifug”
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-319567OAI: oai:DiVA.org:kth-319567DiVA, id: diva2:1700759
External cooperation
3Nine
Subject / course
Chemical Engineering
Educational program
Master of Science - Nanotechnology
Examiners
Available from: 2022-10-03 Created: 2022-10-03 Last updated: 2025-02-18

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