Dissolution of natural serpentinite in mineral and organic acids

Sebastian Teir; Hannu Revitzer; Sanni Eloneva; Carl Johan Fogelholm; Ron Zevenhoven

doi:10.1016/j.minpro.2007.04.001

Dissolution of natural serpentinite in mineral and organic acids

Sebastian Teir^*, Hannu Revitzer, Sanni Eloneva, Carl Johan Fogelholm, Ron Zevenhoven

^*Corresponding author for this work

Laboratory of Process and Systems Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

305 Citations (Scopus)

Abstract

Abundant resources of magnesium silicates make an interesting prospect for long-term storage of CO₂ by mineral carbonation. Several carbonation processes proposed in literature for CO₂ storage employ extraction of silicate minerals using a liquid solvent. In this study, the dissolution of natural serpentinite in respective solutions of acids, bases and ammonium salts has been investigated. Experiments performed at room temperature showed that H₂SO₄ was most efficient at extracting magnesium from serpentinite, followed by HCl, HNO₃, HCOOH and CH₃COOH. Experiments for determining the dissolution kinetics was performed at temperatures of 30, 50 and 70 °C in 2 M solutions of H₂SO₄, HCl, and HNO₃. At 70 °C temperatures all magnesium was extracted from serpentinite in each of the three acid solutions tested during 1-2 h. Also a large part of iron in serpentinite was extracted, while very little silicon dissolved (< 4%). The dissolution rate seemed to be limited by product layer diffusion for serpentinite particles with a size distribution of 74-125 μm. The apparent activation energies were 68 kJ mol^{- 1} for dissolution in H₂SO₄, 70 kJ mol^{- 1} for dissolution in HCl, and 74 kJ mol^{- 1} for dissolution in HNO₃.

Original language	English
Pages (from-to)	36-46
Number of pages	11
Journal	International Journal of Mineral Processing
Volume	83
Issue number	1-2
DOIs	https://doi.org/10.1016/j.minpro.2007.04.001
Publication status	Published - 4 Jul 2007
MoE publication type	A1 Journal article-refereed

Funding

We thank Esko Pöyliö and Rita Kallio at Ruukki for generously providing us with XRF and XRD services, and the Laboratory of Energy Engineering and Environmental Protection for facilitating this work. We thank Mika Järvinen for helpful comments and proof-reading, and Jaakko Savolahti for assisting us with the experiments. We acknowledge the Nordic Energy Research, the Finnish Funding Agency for Technology and Innovation (TEKES) and the Finnish Recovery Boiler Committee for financial support. Ron Zevenhoven acknowledges the Academy of Finland for an Academy Researcher position (2004–2005).

Keywords

Extraction
Kinetics
Leaching
Mineral carbonation
Serpentine
Serpentinite

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10.1016/j.minpro.2007.04.001

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title = "Dissolution of natural serpentinite in mineral and organic acids",

abstract = "Abundant resources of magnesium silicates make an interesting prospect for long-term storage of CO2 by mineral carbonation. Several carbonation processes proposed in literature for CO2 storage employ extraction of silicate minerals using a liquid solvent. In this study, the dissolution of natural serpentinite in respective solutions of acids, bases and ammonium salts has been investigated. Experiments performed at room temperature showed that H2SO4 was most efficient at extracting magnesium from serpentinite, followed by HCl, HNO3, HCOOH and CH3COOH. Experiments for determining the dissolution kinetics was performed at temperatures of 30, 50 and 70 °C in 2 M solutions of H2SO4, HCl, and HNO3. At 70 °C temperatures all magnesium was extracted from serpentinite in each of the three acid solutions tested during 1-2 h. Also a large part of iron in serpentinite was extracted, while very little silicon dissolved (< 4\%). The dissolution rate seemed to be limited by product layer diffusion for serpentinite particles with a size distribution of 74-125 μm. The apparent activation energies were 68 kJ mol- 1 for dissolution in H2SO4, 70 kJ mol- 1 for dissolution in HCl, and 74 kJ mol- 1 for dissolution in HNO3.",

keywords = "Extraction, Kinetics, Leaching, Mineral carbonation, Serpentine, Serpentinite",

author = "Sebastian Teir and Hannu Revitzer and Sanni Eloneva and Fogelholm, \{Carl Johan\} and Ron Zevenhoven",

note = "Funding Information: We thank Esko P{\"o}yli{\"o} and Rita Kallio at Ruukki for generously providing us with XRF and XRD services, and the Laboratory of Energy Engineering and Environmental Protection for facilitating this work. We thank Mika J{\"a}rvinen for helpful comments and proof-reading, and Jaakko Savolahti for assisting us with the experiments. We acknowledge the Nordic Energy Research, the Finnish Funding Agency for Technology and Innovation (TEKES) and the Finnish Recovery Boiler Committee for financial support. Ron Zevenhoven acknowledges the Academy of Finland for an Academy Researcher position (2004–2005). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2007",

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doi = "10.1016/j.minpro.2007.04.001",

language = "English",

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T1 - Dissolution of natural serpentinite in mineral and organic acids

AU - Teir, Sebastian

AU - Revitzer, Hannu

AU - Eloneva, Sanni

AU - Fogelholm, Carl Johan

AU - Zevenhoven, Ron

N1 - Funding Information: We thank Esko Pöyliö and Rita Kallio at Ruukki for generously providing us with XRF and XRD services, and the Laboratory of Energy Engineering and Environmental Protection for facilitating this work. We thank Mika Järvinen for helpful comments and proof-reading, and Jaakko Savolahti for assisting us with the experiments. We acknowledge the Nordic Energy Research, the Finnish Funding Agency for Technology and Innovation (TEKES) and the Finnish Recovery Boiler Committee for financial support. Ron Zevenhoven acknowledges the Academy of Finland for an Academy Researcher position (2004–2005). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2007/7/4

Y1 - 2007/7/4

N2 - Abundant resources of magnesium silicates make an interesting prospect for long-term storage of CO2 by mineral carbonation. Several carbonation processes proposed in literature for CO2 storage employ extraction of silicate minerals using a liquid solvent. In this study, the dissolution of natural serpentinite in respective solutions of acids, bases and ammonium salts has been investigated. Experiments performed at room temperature showed that H2SO4 was most efficient at extracting magnesium from serpentinite, followed by HCl, HNO3, HCOOH and CH3COOH. Experiments for determining the dissolution kinetics was performed at temperatures of 30, 50 and 70 °C in 2 M solutions of H2SO4, HCl, and HNO3. At 70 °C temperatures all magnesium was extracted from serpentinite in each of the three acid solutions tested during 1-2 h. Also a large part of iron in serpentinite was extracted, while very little silicon dissolved (< 4%). The dissolution rate seemed to be limited by product layer diffusion for serpentinite particles with a size distribution of 74-125 μm. The apparent activation energies were 68 kJ mol- 1 for dissolution in H2SO4, 70 kJ mol- 1 for dissolution in HCl, and 74 kJ mol- 1 for dissolution in HNO3.

AB - Abundant resources of magnesium silicates make an interesting prospect for long-term storage of CO2 by mineral carbonation. Several carbonation processes proposed in literature for CO2 storage employ extraction of silicate minerals using a liquid solvent. In this study, the dissolution of natural serpentinite in respective solutions of acids, bases and ammonium salts has been investigated. Experiments performed at room temperature showed that H2SO4 was most efficient at extracting magnesium from serpentinite, followed by HCl, HNO3, HCOOH and CH3COOH. Experiments for determining the dissolution kinetics was performed at temperatures of 30, 50 and 70 °C in 2 M solutions of H2SO4, HCl, and HNO3. At 70 °C temperatures all magnesium was extracted from serpentinite in each of the three acid solutions tested during 1-2 h. Also a large part of iron in serpentinite was extracted, while very little silicon dissolved (< 4%). The dissolution rate seemed to be limited by product layer diffusion for serpentinite particles with a size distribution of 74-125 μm. The apparent activation energies were 68 kJ mol- 1 for dissolution in H2SO4, 70 kJ mol- 1 for dissolution in HCl, and 74 kJ mol- 1 for dissolution in HNO3.

KW - Extraction

KW - Kinetics

KW - Leaching

KW - Mineral carbonation

KW - Serpentine

KW - Serpentinite

UR - https://www.scopus.com/pages/publications/34249857647

U2 - 10.1016/j.minpro.2007.04.001

DO - 10.1016/j.minpro.2007.04.001

M3 - Article

AN - SCOPUS:34249857647

SN - 0301-7516

VL - 83

SP - 36

EP - 46

JO - International Journal of Mineral Processing

JF - International Journal of Mineral Processing

IS - 1-2

ER -

Dissolution of natural serpentinite in mineral and organic acids

Abstract

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Keywords

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