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Title: Effects of Salinity-Induced Chemical Reactions on Biotite Wettability Changes under Geologic CO 2 Sequestration Conditions

Abstract

The wettability of rocks and minerals significantly affects the safety and efficiency of energy-related subsurface operations. Salinity is an important controlling factor in terms of wettability but has received limited attention. We studied the effects of salinity-induced chemical reactions on biotite's wettability changes under relevant subsurface conditions. Biotite was reacted at 95 °C and 102 atm of CO 2 for 70 h in solutions with salinities of 0, 0.1, 0.5, and 1.0 M NaCl. Then, static and dynamic water contact angles on reacted biotite basal surfaces were measured using a captive drop method. As a result of enhanced biotite dissolution at higher salinities, increased roughness, more negatively charged surfaces, and higher densities of hydroxyl groups on the biotite surfaces made biotite basal surface more hydrophilic. These results provide new information about the interplay of chemical reactions and wettability alterations of minerals, providing a better understanding of CO 2 transport in subsurface environments.

Authors:
 [1];  [2];  [1];  [2];  [1]
  1. Washington Univ., St. Louis, MO (United States). Dept. of Energy, Environmental and Chemical Engineering
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Geosciences Division
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1506253
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Environmental Science & Technology Letters (Online)
Additional Journal Information:
Journal Name: Environmental Science & Technology Letters (Online); Journal Volume: 3; Journal Issue: 3; Journal ID: ISSN 2328-8930
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 58 GEOSCIENCES

Citation Formats

Zhang, Lijie, Kim, Yongman, Jung, Haesung, Wan, Jiamin, and Jun, Young-Shin. Effects of Salinity-Induced Chemical Reactions on Biotite Wettability Changes under Geologic CO2 Sequestration Conditions. United States: N. p., 2016. Web. doi:10.1021/acs.estlett.5b00359.
Zhang, Lijie, Kim, Yongman, Jung, Haesung, Wan, Jiamin, & Jun, Young-Shin. Effects of Salinity-Induced Chemical Reactions on Biotite Wettability Changes under Geologic CO2 Sequestration Conditions. United States. doi:10.1021/acs.estlett.5b00359.
Zhang, Lijie, Kim, Yongman, Jung, Haesung, Wan, Jiamin, and Jun, Young-Shin. Wed . "Effects of Salinity-Induced Chemical Reactions on Biotite Wettability Changes under Geologic CO2 Sequestration Conditions". United States. doi:10.1021/acs.estlett.5b00359. https://www.osti.gov/servlets/purl/1506253.
@article{osti_1506253,
title = {Effects of Salinity-Induced Chemical Reactions on Biotite Wettability Changes under Geologic CO2 Sequestration Conditions},
author = {Zhang, Lijie and Kim, Yongman and Jung, Haesung and Wan, Jiamin and Jun, Young-Shin},
abstractNote = {The wettability of rocks and minerals significantly affects the safety and efficiency of energy-related subsurface operations. Salinity is an important controlling factor in terms of wettability but has received limited attention. We studied the effects of salinity-induced chemical reactions on biotite's wettability changes under relevant subsurface conditions. Biotite was reacted at 95 °C and 102 atm of CO2 for 70 h in solutions with salinities of 0, 0.1, 0.5, and 1.0 M NaCl. Then, static and dynamic water contact angles on reacted biotite basal surfaces were measured using a captive drop method. As a result of enhanced biotite dissolution at higher salinities, increased roughness, more negatively charged surfaces, and higher densities of hydroxyl groups on the biotite surfaces made biotite basal surface more hydrophilic. These results provide new information about the interplay of chemical reactions and wettability alterations of minerals, providing a better understanding of CO2 transport in subsurface environments.},
doi = {10.1021/acs.estlett.5b00359},
journal = {Environmental Science & Technology Letters (Online)},
number = 3,
volume = 3,
place = {United States},
year = {2016},
month = {2}
}

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