Energy efficiency analysis of CO 2 mineral sequestration in magnesium silicate rock using electrochemical steps

Thomas Björklöf; Ron Zevenhoven

doi:10.1016/j.cherd.2012.02.001

Energy efficiency analysis of CO ₂ mineral sequestration in magnesium silicate rock using electrochemical steps

Thomas Björklöf, Ron Zevenhoven^*

^*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Lehtiartikkeli › Artikkeli › Tieteellinen › vertaisarvioitu

14 Sitaatiot (Scopus)

Abstrakti

A thermodynamic efficiency analysis using the exergy concept is used to assess CO ₂ mineral sequestration process routes where electrochemical steps (electrolysis and fuel cells) are used to produce aqueous hydrochloric acid and sodium hydroxide reactant solutions. Results from three recent publications on the subject that come to different conclusions are used for this case study. It is shown that including electrolysis as one of the steps of a magnesium silicate mineral carbonation process route results in input energy requirements that will exceed the output of a fossil fuel-fired power plant that produces the CO ₂ that is bound to (hydro-) carbonates. At the same time, fuel cells are not efficient enough to change this.

Alkuperäiskieli	Englanti
Sivut	1467-1472
Sivumäärä	6
Julkaisu	Chemical Engineering Research and Design
Vuosikerta	90
Numero	10
DOI - pysyväislinkit	https://doi.org/10.1016/j.cherd.2012.02.001
Tila	Julkaistu - lokak. 2012
OKM-julkaisutyyppi	A1 Julkaistu artikkeli, soviteltu

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10.1016/j.cherd.2012.02.001Lisenssi: Määrittelemätön

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title = "Energy efficiency analysis of CO 2 mineral sequestration in magnesium silicate rock using electrochemical steps",

abstract = "A thermodynamic efficiency analysis using the exergy concept is used to assess CO 2 mineral sequestration process routes where electrochemical steps (electrolysis and fuel cells) are used to produce aqueous hydrochloric acid and sodium hydroxide reactant solutions. Results from three recent publications on the subject that come to different conclusions are used for this case study. It is shown that including electrolysis as one of the steps of a magnesium silicate mineral carbonation process route results in input energy requirements that will exceed the output of a fossil fuel-fired power plant that produces the CO 2 that is bound to (hydro-) carbonates. At the same time, fuel cells are not efficient enough to change this.",

keywords = "CO sequestration, Electrolysis, Energy efficiency, Exergy, Magnesium silicates, Mineral carbonation",

author = "Thomas Bj{\"o}rkl{\"o}f and Ron Zevenhoven",

note = "Funding Information: This work is funded by the Academy of Finland's Sustainable Energy program (2008–2011), project Carbonates in Energy Technology (CarETech). Copyright: Copyright 2012 Elsevier B.V., All rights reserved.",

year = "2012",

month = oct,

doi = "10.1016/j.cherd.2012.02.001",

language = "English",

volume = "90",

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journal = "Chemical Engineering Research and Design",

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TY - JOUR

T1 - Energy efficiency analysis of CO 2 mineral sequestration in magnesium silicate rock using electrochemical steps

AU - Björklöf, Thomas

AU - Zevenhoven, Ron

N1 - Funding Information: This work is funded by the Academy of Finland's Sustainable Energy program (2008–2011), project Carbonates in Energy Technology (CarETech). Copyright: Copyright 2012 Elsevier B.V., All rights reserved.

PY - 2012/10

Y1 - 2012/10

N2 - A thermodynamic efficiency analysis using the exergy concept is used to assess CO 2 mineral sequestration process routes where electrochemical steps (electrolysis and fuel cells) are used to produce aqueous hydrochloric acid and sodium hydroxide reactant solutions. Results from three recent publications on the subject that come to different conclusions are used for this case study. It is shown that including electrolysis as one of the steps of a magnesium silicate mineral carbonation process route results in input energy requirements that will exceed the output of a fossil fuel-fired power plant that produces the CO 2 that is bound to (hydro-) carbonates. At the same time, fuel cells are not efficient enough to change this.

AB - A thermodynamic efficiency analysis using the exergy concept is used to assess CO 2 mineral sequestration process routes where electrochemical steps (electrolysis and fuel cells) are used to produce aqueous hydrochloric acid and sodium hydroxide reactant solutions. Results from three recent publications on the subject that come to different conclusions are used for this case study. It is shown that including electrolysis as one of the steps of a magnesium silicate mineral carbonation process route results in input energy requirements that will exceed the output of a fossil fuel-fired power plant that produces the CO 2 that is bound to (hydro-) carbonates. At the same time, fuel cells are not efficient enough to change this.

KW - CO sequestration

KW - Electrolysis

KW - Energy efficiency

KW - Exergy

KW - Magnesium silicates

KW - Mineral carbonation

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U2 - 10.1016/j.cherd.2012.02.001

DO - 10.1016/j.cherd.2012.02.001

M3 - Article

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JO - Chemical Engineering Research and Design

JF - Chemical Engineering Research and Design

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