Clark, DE;
Gunnarsson, I;
Aradóttir, ES;
Þ. Arnarson, M;
Þorgeirsson, ÞA;
Sigurðardóttir, SS;
Sigfússon, B;
... Gíslason, SR; + view all
(2018)
The chemistry and potential reactivity of the CO 2 -H 2 S charged injected waters at the basaltic CarbFix2 site, Iceland.
Energy Procedia
, 146
pp. 121-128.
10.1016/j.egypro.2018.07.016.
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Abstract
The CarbFix2 project aims to capture and store the CO2 and H2S emissions from the Hellisheiði geothermal power plant in Iceland by underground mineral storage. The gas mixture is captured directly by its dissolution into water at elevated pressure. This fluid is then injected, along with effluent geothermal water, into subsurface basalts to mineralize the dissolved acid gases as carbonates and sulfides. Sampled effluent and gas-charged injection waters were analyzed and their mixing geochemically modeled using PHREEQC. Results suggest that carbonates, sulfides, and other secondary minerals would only precipitate after it has substantially reacted with the host basalt. Moreover, the fluid is undersaturated with respect to the most common primary and secondary minerals at the injection well outlet, suggesting that the risk of clogging fluid flow paths near the injection well is limited.
| Type: | Article |
|---|---|
| Title: | The chemistry and potential reactivity of the CO 2 -H 2 S charged injected waters at the basaltic CarbFix2 site, Iceland |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.egypro.2018.07.016 |
| Publisher version: | https://doi.org/10.1016/j.egypro.2018.07.016 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | CO2 sequestration, H2S sequestration, gas injection, mineral storage, CCS, basalt |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10057666 |
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