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^*

^*Korresponderande författare för detta arbete

Forskningsoutput: Tidskriftsbidrag › Artikel › Vetenskaplig › Peer review

14 Citeringar (Scopus)

Sammanfattning

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.

Originalspråk	Engelska
Sidor (från-till)	1467-1472
Antal sidor	6
Tidskrift	Chemical Engineering Research and Design
Volym	90
Nummer	10
DOI	https://doi.org/10.1016/j.cherd.2012.02.001
Status	Publicerad - okt. 2012
MoE-publikationstyp	A1 Tidskriftsartikel-refererad

Finansiering

This work is funded by the Academy of Finland's Sustainable Energy program (2008–2011), project Carbonates in Energy Technology (CarETech).

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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{\textendash}2011), project Carbonates in Energy Technology (CarETech). Copyright: Copyright 2012 Elsevier B.V., All rights reserved.",

year = "2012",

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

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AU - Björklöf, Thomas

AU - Zevenhoven, Ron

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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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