CO2 sequestration by magnesite mineralisation through interaction of Mg-brine and CO2: integrated laboratory experiments and computerised geochemical modelling |
| |
| Authors: | Marcos Antônio Klunk Nattan Roberto Caetano Rommulo Vieira Conceição Paulo Roberto Wander Sudipta Dasgupta |
| |
| Affiliation: | 1. Graduation Program in Mechanical Engineering, University of Vale do Rio dos Sinos , S?o Leopoldo, Brazil;2. Department of Mechanical Engineering, Federal University of Santa Maria , Santa Maria, Brazil;3. Department of Physical Chemistry, Federal University of Rio Grande do Sul , Porto Alegre, Brazil;4. Department of Earth Sciences, Indian Institute of Technology Bombay (IIT Bombay) , Powai, India |
| |
| Abstract: | ABSTRACT Several Carbon Capture and Storage (CCS) techniques have been studied including injections of carbon dioxide (CO2) into the mature and/or depleted hydrocarbon reservoirs and deep saline aquifers. This work aims to test storing CO2 into the magnesium-rich evaporite strata and also into the stratigraphic intervals containing Mg-rich brines. The test simulates Mg-carbonation of the synthetic solution obtained from the Mg-evaporite mineral, bischofite – both experimentally in the laboratory condition and also through computerised geochemical simulation. The laboratory experiments, which resulted in the crystallisation of anhydrous magnesite, were analysed. The TOUGHREACTTM, Geochemist’s WorkbenchTM (GWB) and PHREEQCTM software simulated the experiments as computerised geochemical model and tested the results for natural geological conditions. The geochemical simulations successfully demonstrate the immense CCS potential for the Mg-evaporite (as well as the sedimentary strata charged with Mg-evaporitic brine) at their subsurface geological occurrences at elevated pressure-temperature and high salinity. |
| |
| Keywords: | Mineral carbonation magnesite geochemical modelling bischofite |
|
|
