The influence of gas and humidity on the mineralogy of various salt compositions – implications for natural and technical caverns
<p>Storage caverns are increasingly located in heterogeneous salt deposits and filled with various fluids. The knowledge of phase behaviour in heterogeneous systems of salt, liquid and gas and the requirements for reliable analytical techniques is, therefore, of growing interest. A method t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-08-01
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| Series: | Advances in Geosciences |
| Online Access: | https://www.adv-geosci.net/45/227/2018/adgeo-45-227-2018.pdf |
| _version_ | 1818009467436924928 |
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| author | B. Strauch M. Zimmer A. Zirkler S. Höntzsch A. M. Schleicher |
| author_facet | B. Strauch M. Zimmer A. Zirkler S. Höntzsch A. M. Schleicher |
| author_sort | B. Strauch |
| collection | DOAJ |
| description | <p>Storage caverns are increasingly located in heterogeneous salt deposits and
filled with various fluids. The knowledge of phase behaviour in heterogeneous
systems of salt, liquid and gas and the requirements for reliable analytical
techniques is, therefore, of growing interest. A method that allows for the
continuous monitoring of mineral compositions at distinct humidity and gas
content using XRD measurements is presented here. Various saliniferous
mineral compositions have been investigated in pure CO<sub>2</sub>,
N<sub>2</sub> or CH<sub>4</sub> atmospheres with varying humidity in a closed
chamber. All mineral compositions experience dissolution and/or mineral
conversion reaction accompanied by volume loss. Dissolution-recrystallization
reactions of complex mineral assemblages involving halite, sylvite,
kieserite, carnallite and kainite were observed using this method. For
carnallite-rich mineral assemblages, the mineral conversion from carnallite
to sylvite was observed when humidity exceeded 50 % RH. In the presence
of CO<sub>2</sub>, acidification of the aqueous phase occurs which enhances
the dissolution rate and reaction kinetics.</p> |
| first_indexed | 2024-04-14T05:43:13Z |
| format | Article |
| id | doaj.art-9c12bd137e49433986eb4cacb7e05791 |
| institution | Directory Open Access Journal |
| issn | 1680-7340 1680-7359 |
| language | English |
| last_indexed | 2024-04-14T05:43:13Z |
| publishDate | 2018-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Advances in Geosciences |
| spelling | doaj.art-9c12bd137e49433986eb4cacb7e057912022-12-22T02:09:22ZengCopernicus PublicationsAdvances in Geosciences1680-73401680-73592018-08-014522723310.5194/adgeo-45-227-2018The influence of gas and humidity on the mineralogy of various salt compositions – implications for natural and technical cavernsB. Strauch0M. Zimmer1A. Zirkler2S. Höntzsch3A. M. Schleicher4GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, GermanyGFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, GermanyK+S Aktiengesellschaft, Bertha-von-Suttner-Straße 7, 34131 Kassel, GermanyK+S Windsor Salt Ltd., 30 Prospect Avenue, Windsor, ON, CanadaGFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany<p>Storage caverns are increasingly located in heterogeneous salt deposits and filled with various fluids. The knowledge of phase behaviour in heterogeneous systems of salt, liquid and gas and the requirements for reliable analytical techniques is, therefore, of growing interest. A method that allows for the continuous monitoring of mineral compositions at distinct humidity and gas content using XRD measurements is presented here. Various saliniferous mineral compositions have been investigated in pure CO<sub>2</sub>, N<sub>2</sub> or CH<sub>4</sub> atmospheres with varying humidity in a closed chamber. All mineral compositions experience dissolution and/or mineral conversion reaction accompanied by volume loss. Dissolution-recrystallization reactions of complex mineral assemblages involving halite, sylvite, kieserite, carnallite and kainite were observed using this method. For carnallite-rich mineral assemblages, the mineral conversion from carnallite to sylvite was observed when humidity exceeded 50 % RH. In the presence of CO<sub>2</sub>, acidification of the aqueous phase occurs which enhances the dissolution rate and reaction kinetics.</p>https://www.adv-geosci.net/45/227/2018/adgeo-45-227-2018.pdf |
| spellingShingle | B. Strauch M. Zimmer A. Zirkler S. Höntzsch A. M. Schleicher The influence of gas and humidity on the mineralogy of various salt compositions – implications for natural and technical caverns Advances in Geosciences |
| title | The influence of gas and humidity on the mineralogy of various salt compositions – implications for natural and technical caverns |
| title_full | The influence of gas and humidity on the mineralogy of various salt compositions – implications for natural and technical caverns |
| title_fullStr | The influence of gas and humidity on the mineralogy of various salt compositions – implications for natural and technical caverns |
| title_full_unstemmed | The influence of gas and humidity on the mineralogy of various salt compositions – implications for natural and technical caverns |
| title_short | The influence of gas and humidity on the mineralogy of various salt compositions – implications for natural and technical caverns |
| title_sort | influence of gas and humidity on the mineralogy of various salt compositions implications for natural and technical caverns |
| url | https://www.adv-geosci.net/45/227/2018/adgeo-45-227-2018.pdf |
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