Stable solid and aqueous H 2 CO 3 from CO 2 and H 2 O at high pressure and high temperature
Carbonic acid (H 2 CO 3 ) forms in small amounts when CO 2 dissolves in H 2 O, yet decomposes rapidly under ambient conditions of temperature and pressure. Despite its fleeting existence, H 2 CO 3 plays an important role in the global carbon cycle and in biological carbonate-containing systems. The...
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ftpubman:oai:pure.mpg.de:item_2260679 2023-08-20T04:05:53+02:00 Stable solid and aqueous H 2 CO 3 from CO 2 and H 2 O at high pressure and high temperature Wang, H. Zeuschner, J. Eremets, M. Troyan, I. Williams, J. 2016-01-27 http://hdl.handle.net/11858/00-001M-0000-002A-2241-E unknown info:eu-repo/semantics/altIdentifier/doi/10.1038/srep19902 http://hdl.handle.net/11858/00-001M-0000-002A-2241-E Scientific Reports info:eu-repo/semantics/article 2016 ftpubman https://doi.org/10.1038/srep19902 2023-08-01T20:36:56Z Carbonic acid (H 2 CO 3 ) forms in small amounts when CO 2 dissolves in H 2 O, yet decomposes rapidly under ambient conditions of temperature and pressure. Despite its fleeting existence, H 2 CO 3 plays an important role in the global carbon cycle and in biological carbonate-containing systems. The short lifetime in water and presumed low concentration under all terrestrial conditions has stifled study of this fundamental species. Here, we have examined CO 2 / H 2 O mixtures under conditions of high pressure and high temperature to explore the potential for reaction to H 2 CO 3 inside celestial bodies. We present a novel method to prepare solid H 2 CO 3 by heating CO 2 /H 2 O mixtures at high pressure with a CO 2 laser. Furthermore, we found that, contrary to present understanding, neutral H 2 CO 3 is a significant component in aqueous CO 2 solutions above 2.4 GPa and 110 degrees C as identified by IR-absorption and Raman spectroscopy. This is highly significant for speciation of deep C-O-H fluids with potential consequences for fluid-carbonate-bearing rock interactions. As conditions inside subduction zones on Earth appear to be most favorable for production of aqueous H 2 CO 3 , a role in subduction related phenomena is inferred. Article in Journal/Newspaper Carbonic acid Max Planck Society: MPG.PuRe Scientific Reports 6 1 |
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Max Planck Society: MPG.PuRe |
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Carbonic acid (H 2 CO 3 ) forms in small amounts when CO 2 dissolves in H 2 O, yet decomposes rapidly under ambient conditions of temperature and pressure. Despite its fleeting existence, H 2 CO 3 plays an important role in the global carbon cycle and in biological carbonate-containing systems. The short lifetime in water and presumed low concentration under all terrestrial conditions has stifled study of this fundamental species. Here, we have examined CO 2 / H 2 O mixtures under conditions of high pressure and high temperature to explore the potential for reaction to H 2 CO 3 inside celestial bodies. We present a novel method to prepare solid H 2 CO 3 by heating CO 2 /H 2 O mixtures at high pressure with a CO 2 laser. Furthermore, we found that, contrary to present understanding, neutral H 2 CO 3 is a significant component in aqueous CO 2 solutions above 2.4 GPa and 110 degrees C as identified by IR-absorption and Raman spectroscopy. This is highly significant for speciation of deep C-O-H fluids with potential consequences for fluid-carbonate-bearing rock interactions. As conditions inside subduction zones on Earth appear to be most favorable for production of aqueous H 2 CO 3 , a role in subduction related phenomena is inferred. |
format |
Article in Journal/Newspaper |
author |
Wang, H. Zeuschner, J. Eremets, M. Troyan, I. Williams, J. |
spellingShingle |
Wang, H. Zeuschner, J. Eremets, M. Troyan, I. Williams, J. Stable solid and aqueous H 2 CO 3 from CO 2 and H 2 O at high pressure and high temperature |
author_facet |
Wang, H. Zeuschner, J. Eremets, M. Troyan, I. Williams, J. |
author_sort |
Wang, H. |
title |
Stable solid and aqueous H 2 CO 3 from CO 2 and H 2 O at high pressure and high temperature |
title_short |
Stable solid and aqueous H 2 CO 3 from CO 2 and H 2 O at high pressure and high temperature |
title_full |
Stable solid and aqueous H 2 CO 3 from CO 2 and H 2 O at high pressure and high temperature |
title_fullStr |
Stable solid and aqueous H 2 CO 3 from CO 2 and H 2 O at high pressure and high temperature |
title_full_unstemmed |
Stable solid and aqueous H 2 CO 3 from CO 2 and H 2 O at high pressure and high temperature |
title_sort |
stable solid and aqueous h 2 co 3 from co 2 and h 2 o at high pressure and high temperature |
publishDate |
2016 |
url |
http://hdl.handle.net/11858/00-001M-0000-002A-2241-E |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Scientific Reports |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/srep19902 http://hdl.handle.net/11858/00-001M-0000-002A-2241-E |
op_doi |
https://doi.org/10.1038/srep19902 |
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Scientific Reports |
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6 |
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1 |
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1774716634323222528 |