External electric field enhances CO2 geological Storage: A molecular dynamics simulation
Title
External electric field enhances CO2 geological Storage: A molecular dynamics simulation
Subject
Adsorption
Molecular dynamics
Carbon dioxide
Electric fields
Molecules
Hydrogen bonds
Geology
Kaolinite
Description
The microscopic understanding of adsorption and storage of CO2 in minerals is of great significance for large-scale geological storage of CO2. The behaviors of the H2O CO2 system absorbed on the kaolinite surfaces with oscillating and static electric fields were investigated by the non-equilibrium molecular dynamics simulation. The results show that the H2O molecules will adsorb onto clay surfaces and reduce the adsorption of CO2, which results in lower amounts of geological storage of CO2. However, the applied external static electric fields can break hydrogen bonds which formed between H2O molecules and clay surface, and thus promote the desorption of H2O and geological storage of CO2. The static electric fields are more pronounced in enhancing CO2 geological storage with an extra 15.58 % when the surface is vertical to the electric field direction. Meanwhile, the initial dipole orientation of H2O in the adsorption phase, which is parallel to the surface, decides that electric fields are more efficient on the surface vertical to the electric field direction. This research will be helpful to understand how electric fields promote CO2 geological storage on the molecular level. 2021 Elsevier B.V.
572
Publisher
Applied Surface Science
Date
2022
Contributor
Liao, Bo
Zhang, Zhenlei
Wang, Diansheng
Xu, Yan
Wei, Yupeng
Bao, Wancheng
Lv, Kaihe
Wang, Jintang
Wang, Yudou
Type
journalArticle
Identifier
1694332
10.1016/j.apsusc.2021.151312
Collection
Citation
“External electric field enhances CO2 geological Storage: A molecular dynamics simulation,” Lamar University Midstream Center Research, accessed May 15, 2024, https://lumc.omeka.net/items/show/25804.