Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Nanoscale Control Over Water-Film Thickness Using Temperature Modulation: Tuning Mineral Carbonation Reactivity

Journal Article · · Environmental Science Nano
DOI:https://doi.org/10.1039/D3EN00884C· OSTI ID:2407280

Induced temperature gradients within a high-pressure reactor were used to assess how the thickness of surface-adsorbed water films affect the carbonation of forsterite, Mg2SiO4, in water-saturated supercritical carbon dioxide (scCO2). Water monolayer (ML) coverages on the mineral surface were estimated by in situ infrared spectroscopy and were shown to increase nearly exponentially from approximately 5 to 170 when the forsterite region was cooled from +0.5 to -0.3 °C relative to a nearby pool of excess water. Carbonation rates and extents were strongly dependent on the water film thickness, with the highest rates and complete mineral conversion occurring within 40 hr under bulk-like water coverages. Reaction passivation, possibly due to a reduction in reactive surface area, was observed for thinner water films ranging from 5-53 ML. Temperature modulation can be an effective technique for investigating basalt reactivity over a range of water coverages in humidified scCO2.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
2407280
Report Number(s):
PNNL-SA-192867
Journal Information:
Environmental Science Nano, Journal Name: Environmental Science Nano Journal Issue: 4 Vol. 11
Country of Publication:
United States
Language:
English

References (27)

Influence of dust composition on cloud droplet formation journal May 2007
Pressurized in situ X-ray diffraction insights into super/subcritical carbonation reaction pathways of steelmaking slags and constituent silicate minerals journal May 2021
Evidence for Carbonate Surface Complexation during Forsterite Carbonation in Wet Supercritical Carbon Dioxide journal July 2015
Surface-Catalyzed Oxygen Exchange during Mineral Carbonation in Nanoscale Water Films journal May 2019
Low temperature and limited water activity reveal a pathway to magnesite via amorphous magnesium carbonate journal January 2020
In Situ Infrared Spectroscopic Study of Forsterite Carbonation in Wet Supercritical CO 2 journal July 2011
Carbon mineralization and geological storage of CO2 in basalt: Mechanisms and technical challenges journal June 2022
Thin Water Films Enable Low-Temperature Magnesite Growth Under Conditions Relevant to Geologic Carbon Sequestration journal September 2021
Water uptake of clay and desert dust aerosol particles at sub- and supersaturated water vapor conditions journal January 2009
Insights into silicate carbonation processes in water-bearing supercritical CO2 fluids journal July 2013
Critical Water Coverage during Forsterite Carbonation in Thin Water Films: Activating Dissolution and Mass Transport journal May 2020
Injection and Monitoring at the Wallula Basalt Pilot Project journal January 2014
Nanoscale Mg-Depleted Layers Slow Carbonation of Forsterite (Mg2SiO4) When Water Is Limited journal December 2022
Interfacial water dielectric-permittivity-profile measurements using atomic force microscopy journal June 2001
Rapid carbon mineralization for permanent disposal of anthropogenic carbon dioxide emissions journal June 2016
A trapped water network in nanoporous material: the role of interfaces journal January 2011
Water reactivity in the liquid and supercritical CO2 phase: Has half the story been neglected? journal February 2009
Dielectric Constant of Water Confined in a Nanocavity journal June 2001
Molecular-scale mechanisms of CO2 mineralization in nanoscale interfacial water films journal August 2022
Anomalously low dielectric constant of confined water journal June 2018
Silicate Carbonation in Supercritical CO2 Containing Dissolved H2O: An in situ High Pressure X-Ray Diffraction and Infrared Spectroscopy Study journal January 2013
Anomalously low activation energy of nanoconfined MgCO 3 precipitation journal January 2019
Field Validation of Supercritical CO 2 Reactivity with Basalts journal November 2016
Water properties under nano-scale confinement journal June 2019
Wallula Basalt Pilot Demonstration Project: Post-injection Results and Conclusions journal July 2017
Interactions of Water with Mineral Dust Aerosol: Water Adsorption, Hygroscopicity, Cloud Condensation, and Ice Nucleation journal March 2016
Capillary trapping for geologic carbon dioxide storage – From pore scale physics to field scale implications journal September 2015

Similar Records

Thin Water Films Enable Low-Temperature Magnesite Growth Under Conditions Relevant to Geologic Carbon Sequestration
Journal Article · 2021 · Environmental Science & Technology · OSTI ID:1827355

In Situ Infrared Spectroscopic Study of Forsterite Carbonation in Wet Supercritical CO2
Journal Article · 2011 · Environmental Science & Technology, 45(14):6204-6210 · OSTI ID:1020615

Comparative Reactivity Study of Forsterite and Antigorite in Wet Supercritical CO2 by In Situ Infrared Spectroscopy
Journal Article · 2013 · International Journal of Greenhouse Gas Control, 18:246-255 · OSTI ID:1095417

Related Subjects