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Comparative Life-cycle Assessment of Slurry and Wet Accelerated Carbonation of BOF Slag
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Energy Processes.
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2017 (English)In: 13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland, Elsevier, 2017, Vol. 114, 5393-5403 p.Conference paper (Refereed)
Abstract [en]

This work reports the results of the life cycle assessment (LCA) of two carbonation processes aimed at permanent CO2 storage, employing Basic Oxygen Furnace (BOF) slag from steel manufacturing as alkalinity source. Specifically, the performance of the slurry phase and wet carbonation routes were compared assuming to store the CO2 emitted from a 10 MW conventional natural gas power plant. The LCA was based on the material and energy requirements for each of the involved process steps, i.e. pre-treatment and transport of raw materials, CO2 compression, carbonation, post treatments and management of the obtained products. The slurry and wet route resulted in a net avoided greenhouse warming potential (GWP) of 473 and 384 kg CO2/MWhel, respectively. Nevertheless, both routes affected the other environmental impact categories. In general, the wet route had approximately two times higher impact than the slurry route, due in particular to the higher material and energy requirements. An exception was the abiotic resource depletion which resulted higher for the slurry route due to greater water requirement with respect to the wet route. The contributions to all mid-point impact categories were mainly due to energy requirements. A sensitivity analysis showed that the environmental impacts are affected by the energy mix and by the transport distance of slags and carbonation products.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 114, 5393-5403 p.
Series
Energy Procedia, ISSN 1876-6102 ; 114
Keyword [en]
CO2 storage, life cycle assessment, Mineral carbonation, steelmaking slag
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:kth:diva-216353DOI: 10.1016/j.egypro.2017.03.1675Scopus ID: 2-s2.0-85029647241OAI: oai:DiVA.org:kth-216353DiVA: diva2:1150832
Conference
13th International Conference on Greenhouse Gas Control Technologies, GHGT 2016, Lausanne, Switzerland, 14 November 2016 through 18 November 2016
Note

QC 20171020

Available from: 2017-10-20 Created: 2017-10-20 Last updated: 2017-10-20Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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