Accelerating Dissolution of CO2 in Brine by Enhancing Convective Mixing as a Potential Remediation Option

Accelerating Dissolution of CO2 in Brine by Enhancing Convective Mixing as a Potential Remediation Option: 13th International Conference on Greenhouse Gas Control Technologies, GHGT 2016. 14 November 2016 through 18 November 2016

Peters, E.
Salari, J.
Neele, F.

Dixon, T. (editor)
Laloui, L. (editor)
Twinning, S. (editor)

2017

This paper presents a study into the possibility to enhance dissolution of CO2 in brine using nanoparticles (NPs) as a remediation and/or mitigation option for unwanted migration of CO2. The idea is to inject a homogeneous mixture of NPs and CO2 into the stored CO2. The heavier NP-CO2 mixture spreads on the interface between the CO2 and brine. The heavier NPs move into the brine together with the CO2 and increase the density of the brine. This will enhance the process of convective mixing which increases the dissolution rate of CO2. However, it was found that the method is inefficient in terms of the amount of NPs needed compared to the increase in CO2 dissolution. For example, to achieve an increase of 50% in the CO2 dissolution rate, 1 kg of NP is needed to dissolve 3 kg extra CO2 for an example case at 1 km depth. This makes the method unattractive both technically and economically: a large effort is required for engineering NPs with the correct properties, the risks associated are clogging and pressure increase, and the method is expensive.

CCS
Convective mixing
Remediation
Geological Survey Netherlands
2015 Energy
2017 Geo Nano Technology
AG - Applied Geosciences MAS - Materials Solutions
ELSS - Earth, Life and Social Sciences TS - Technical Sciences

http://resolver.tudelft.nl/uuid:396b47d7-ea21-4e5d-bebf-e53ad0489685

https://doi.org/10.1016/j.egypro.2017.03.1560

781331

1876-6102

Energy Proceedia, 114 (114), 4193-4202

Energy Procedia

conference paper