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Carbon dioxide storage by mineralisation applied to a lime kiln
Åbo Akademi University, Dept. of Chemical Engineering.
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics. (Thermochemical Energy Conversion Laboratory)
Åbo Akademi University, Dept. of Chemical Engineering.
Åbo Akademi University, Dept. of Chemical Engineering.
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2012 (English)In: PROCEEDINGS OF ECOS 2012 / [ed] Enrico Sciubba, Giampaolo Manfrida, Umberto Desideri, Firenze: Firenze University Press, 2012, Vol. VI, 226-1-226-13 p.Conference paper (Refereed)
Abstract [en]

This paper describes a design, for a pilot-scale application, of a two-staged process that is under study at Åbo Akademi University (ÅA), for Carbon dioxide Storage by Mineralisation (CSM). The ÅA route implies the production of brucite (besides Ca- and Fe- based by-products) from a magnesium/calcium silicate rock, using recoverable ammonium sulphate (AS), followed by carbonation of the Mg(OH)2 in a pressurised fluidised bed at ~ 500°C, 20-30 bar CO2 partial pressure. An assessment is reported for operating the CSM process on waste heat from a limekiln (lime production: 210 t/day) in Pargas, Southwest Finland, i.e. without external energy input apart from what is needed for crushing the rock to the required particle size (a few % of the overall CSM process energy requirement) and compressing the flue gas to be treated. Part of the off-gas from the limekiln (CO2 content ~21%-vol) will be processed without a CO2 separation step. The feature of operating without CO2 separation makes CSM an attractive and cost-competitive option when compared to conventional CCS involving underground storage of CO2. An exergy analysis is used to optimise process layout and energy efficiency, and at the same time maximise the amount of CO2 that can be bound to MgCO3 given the amount of waste heat available from the kiln. Also, experimental results are reported for producing Mg(OH)2 (and Fe,Ca(OH)2) from local rock material.

Place, publisher, year, edition, pages
Firenze: Firenze University Press, 2012. Vol. VI, 226-1-226-13 p.
Keyword [en]
CO2 mineral sequestration, Scale-up, Lime kiln.
National Category
Chemical Engineering
Research subject
biology, Environmental Science
URN: urn:nbn:se:umu:diva-111574ISBN: ISBN 978-88-6655-322-9OAI: diva2:871815
Available from: 2015-11-17 Created: 2015-11-17 Last updated: 2015-12-17Bibliographically approved
In thesis
1. Sustainability measures in quicklime and cement clinker production
Open this publication in new window or tab >>Sustainability measures in quicklime and cement clinker production
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis investigates sustainability measures for quicklime and cement clinker production. It is the aim of this thesis to contribute to the effort of creating a more sustainable modus of industrial production.

The methods used comprises process simulations through multicomponent chemical equilibrium calculations, fuel characterization and raw materials characterization through dynamic rate thermogravimetry.

The investigated measures relate to alternative fuels, co-combustion, oxygen enrichment, oxyfuel combustion, mineral carbonation and optimizing raw material mixes based on thermal decomposition characteristics.

The predictive multicomponent chemical equilibrium simulation tool developed has been used to investigate new process designs and combustion concepts. The results show that fuel selection and oxygen enrichment influence energy efficiency, and that oxyfuel combustion and mineral carbonation could allow for considerable emission reductions at low energy penalty, as compared to conventional post-combustion carbon dioxide capture technologies. Dynamic rate thermogravimetry, applied to kiln feed limestone, allows for improved feed analysis with a deeper understanding of how mixing of different feed materials will affect the production processes. The predictive simulation tool has proven to be of practical value when planning and executing production and full scale campaigns, reducing costs related to trial and error.

The main conclusion of this work is that several measures are available to increase the sustainability of the industry.

Place, publisher, year, edition, pages
Umeå: Umeå universitet, 2015. 82 p.
limestone, quicklime, cement clinker, sustainability, oxygen, carbon dioxide, thermal decomposition, dynamic rate thermogravimetry, predictive multicomponent chemical equilibrium calculations, mineral carbonation
National Category
Chemical Process Engineering
urn:nbn:se:umu:diva-112842 (URN)978-91-7601-392-2 (ISBN)
Public defence
2016-01-29, sal N420, Naturvetarhuset, Umeå universitet, Umeå, 13:15 (English)
Available from: 2015-12-18 Created: 2015-12-16 Last updated: 2015-12-18Bibliographically approved

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