Formation of carbonates and PH variations in conditions representative of deep saline aquifers

• Published in: CEAT 2013 - 2013 IEEE Conference on Clean Energy and Technology
• Main Author: Mohammadian E.; Hamidi H.; Hafiz Bin Hamid C.W.; Azdarpour A.; Rafati R.
• Format: Conference paper
• Language: English
• Published: IEEE Computer Society 2013
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84898788438&doi=10.1109%2fCEAT.2013.6775670&partnerID=40&md5=18098a9a25e568f579a11d4450befbca

CO2 sequestration in saline aquifers has been of interest as an option to reduce concentration of CO2 in the atmosphere. Of all the mechanisms of sequestration, mineral sequestration is proved to be the most secure one. In this study, formation of carbonates is investigated through monitoring of PH of the medium consist of sand+synthetic brine+ supercritical CO2 and sand+synthetic brine+ supercritical CO2. The experiments are conducted at pressures of 1100 and 1300 psi (CO2 at supercritical state) and temperatures ranged from 70-150. The results indicated that salinity of brine, pressure and temperature of the system directly affect the PH of solution and therefore formation of carbonates. © 2013 IEEE.