Avaliação do potencial dos maciços gabróicos do Alentejo para a carbonatação mineral de CO2

Abstract

The InCarbon project assessed the potential of gabbroic rocks for CO2 storage in alentejo. Lab carbonation experiments were carried out on gabbroic rocks from the Sines and Odivelas massifs. After gabbroic samples exposure to supercritical CO2-rich brine inside an autoclave, for 90 days, the XRD analysis reveals the presence of dolomite on sample surface, whereas the chemical mapping, by SEMEDS, suggest a spatial association between carbon and magnesium (magnesite?). Despite the small amounts of carbonate precipitation projected by the geochemical modelling (Crunch Flow software), this technology should be more investigate and not discarded for in situ or ex situ mineral carbonation for small CO2 emissions sources.