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CCUS i kombination med Industriellsymbios för reducering av CO2-utsläpp: Implementering av CCUS-tekniker för att reducera brändkalktillverkningens miljöpåverkan
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Chemical Sciences (from 2013).
2024 (Swedish)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
CCUS in combination with industrial symbiosis for the reduction of CO2 emissions, : mplementation of CCUS technologies to reduce the environmental impact of quicklime production (English)
Abstract [en]

Global climate change is one of the most pressing challenges we face today, and tackling it requires drastic reductions in greenhouse gas emissions. Sweden has set some ambitious climate goals; they aim to achieve net zero greenhouse gas emissions by 2045 and even go beyond to achieve net negative emissions thereafter. These goals reflect a strong commitment to the global effort to combat climate change. The lime industry, is a significant source of CO2-emissions, so managing these emissions is crucial for achieving these goals.The study focuses on using Carbon Capture, Utilization, and Storage (CCUS) technology on Gotland, in combination with industrial symbiosis, to reduce carbon emissions from a quicklime production facility. This approach not only helps in reducing emissions but also promotes sustainable industrial practices. By capturing and reusing CO2, CCUS technology can play a vital role in keeping global warming below the critical 2°C mark. In this project, the captured CO2 is stored in green liquor dregs from a pulp mill, stored into cement from a cement production facility and used in cultivating microalgae (specifically Chlorella vulgaris) which is then turned into biogas.To measure the environmental impact, an Environmental Life Cycle Assessment (E-LCA) was conducted following the ISO14040 standard. The studie included three main categories: global warming potential (GWP), eutrophication potential (EP), and acidification potential (AP). The results were quite promising: in an extreme scenario where CO2 is stored in green liquor dregsand cement, the GWP could be reduced from 32 tons of CO2-equivalent per day to just 8.7 tons per day. In an optimal scenario, where the eutrophication potential was below zero, the GWP was 9.6 tons per day, in this scenario all the industrial actors were involved.The study also explored different CO2 capture methods and found that Monoethanolamine (MEA) is currently the most suitable method to separate CO2. The study concludes that combining CCUS technology with industrial symbiosis in the lime industry offers significant environmental benefits. However, for these benefits to be realized, technological innovations and economic considerations are crucial. Additionally, supportive economic incentives, greater awareness, and education are essential to gain broader acceptance of these environmentally friendly technologies.Moving forward, its recommended that more research and development in the area of CCUS and industrial symbiosis, along with increased cooperation among industrial stakeholders to implement these solutions effectively.

Place, publisher, year, edition, pages
2024. , p. 49
Identifiers
URN: urn:nbn:se:kau:diva-102028OAI: oai:DiVA.org:kau-102028DiVA, id: diva2:1906732
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Subject / course
Environmental and Energy Systems
Educational program
Engineering: Energy and Environmental Engineering (300 ECTS credits)
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Examiners
Available from: 2024-10-18 Created: 2024-10-18 Last updated: 2025-10-16Bibliographically approved

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