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Reducing the CO2 footprint of cement production by electrification
(Thermochemical Energy Conversion Laboratory (TEC-Lab))
2019 (Engelska)Konferensbidrag, Enbart muntlig presentation (Övrigt vetenskapligt)
Abstract [en]

Transformative actions in CO2 emitting industries are needed to reach the Paris climate agreement.The cement industry, which is responsible for 5-7% of the global CO2 emissions, has the possibility tomake a difference.Cement production is related to two sources of CO2; 1/3 from combustion of fuels and 2/3 fromcalcination of limestone in the cement raw meal. If all the fuels were to be substituted with non-fossilelectricity, the environmental gain would be significant. Cementa and Vattenfall are evaluatingpossibilities on how electricity can be used to substitute fuels in the cement production by 2030.By using electricity for heating, several positive effects are achieved in the production process. Thecleanness of the exhaust gas will be higher due to elimination of volatiles from fuels. The energyconsumption decreases due to lesser volume of gas to be heated. This is related to the exclusion ofnitrogen gas in the process.A feasibility study comprising literature survey and small scale tests have been performed. Electricalheating techniques showing potential are; microwave heating, plasma torches, flash calcination withelectrical heating, hydrogen combustion and a combination of the mentioned techniques.The most relevant finding is that the combustion related CO2 emissions will be eliminated; thecapturing step will be enhanced since the CO2 gas from calcination is clean and accordingly the needof storage or utilization of CO2 is decreased.

Ort, förlag, år, upplaga, sidor
2019.
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Kemiteknik
Identifikatorer
URN: urn:nbn:se:umu:diva-162787OAI: oai:DiVA.org:umu-162787DiVA, id: diva2:1346488
Konferens
15th International Congress on the Chemistry of Cement Prague, Czech Republic, September 16–20, 2019
Tillgänglig från: 2019-08-28 Skapad: 2019-08-28 Senast uppdaterad: 2019-10-30Bibliografiskt granskad

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Hökfors, BodilBackman, Rainer

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Totalt: 118 träffar
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