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Oxyfuel combustion in rotary kiln lime production
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik. NorFraKalk AS, Verdal, Norway ; Nordkalk Oy Ab, Pargas, Finland.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik. Cementa AB, Stockholm.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.
2014 (Engelska)Ingår i: Energy Science & Engineering, ISSN 2050-0505, Vol. 2, nr 4, s. 204-215Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The purpose of this article is to study the impact of oxyfuel combustion applied to a rotary kiln producing lime. Aspects of interest are product quality, energy efficiency, stack gas composition, carbon dioxide emissions, and possible benefits related to carbon dioxide capture. The method used is based on multicomponent chemical equilibrium calculations to predict process conditions. A generic model of a rotary kiln for lime production was validated against operational data and literature. This predicting simulation tool is used to calculate chemical compositions for different recirculation cases. The results show that an oxyfuel process could produce a high-quality lime product. The new process would operate at a lower specific energy consumption thus having also a reduced specific carbon dioxide emission per ton of product ratio. Through some processing, the stack gas from the new process could be suitable for carbon dioxide transport and storage or utilization. The main conclusion of this paper is that lime production with an oxyfuel process is feasible but still needs further study.

Ort, förlag, år, upplaga, sidor
Wiley-Blackwell, 2014. Vol. 2, nr 4, s. 204-215
Nyckelord [en]
Carbon capture and storage, energy efficiency, lime, oxyfuel
Nationell ämneskategori
Kemiteknik
Identifikatorer
URN: urn:nbn:se:umu:diva-111578DOI: 10.1002/ese3.40ISI: 000209695600005OAI: oai:DiVA.org:umu-111578DiVA, id: diva2:871829
Tillgänglig från: 2015-11-17 Skapad: 2015-11-17 Senast uppdaterad: 2018-06-07Bibliografiskt granskad
Ingår i avhandling
1. Sustainability measures in quicklime and cement clinker production
Öppna denna publikation i ny flik eller fönster >>Sustainability measures in quicklime and cement clinker production
2015 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
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.

Ort, förlag, år, upplaga, sidor
Umeå: Umeå universitet, 2015. s. 82
Nyckelord
limestone, quicklime, cement clinker, sustainability, oxygen, carbon dioxide, thermal decomposition, dynamic rate thermogravimetry, predictive multicomponent chemical equilibrium calculations, mineral carbonation
Nationell ämneskategori
Kemiska processer
Identifikatorer
urn:nbn:se:umu:diva-112842 (URN)978-91-7601-392-2 (ISBN)
Disputation
2016-01-29, sal N420, Naturvetarhuset, Umeå universitet, Umeå, 13:15 (Engelska)
Opponent
Handledare
Tillgänglig från: 2015-12-18 Skapad: 2015-12-16 Senast uppdaterad: 2018-06-07Bibliografiskt granskad

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