Numerical investigation of naphthalene deposition dynamics during CO2 leakage
Yang, Yong; Su, Xin; Fan, Zongliang; Wang, Dongliang; Li, Jiyan
2020-01
Source PublicationINTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
ISSN1750-5836
Volume92
AbstractAn important leakage risk associated with CO2 geological sequestration is the potential transport and fate of organic contaminants due to the CO2 leakage. In this paper, a precipitation and deposition dynamic model was constructed using COMSOL to evaluate the potential impacts of organic contaminants in response to the leakage of CO2 and brine into a shallow aquifer. The Span-Wagner equation and Peng-Robinson equations were adopted to estimate the partitioning behavior of organic contaminants. Numerical simulations with naphthalene as a representative contaminant show that the dissolved component is transported with the equilibrium concentrations at the thermodynamic conditions built by the fluid phase, while the precipitated solid particles are either transported with carrier fluid or deposited in the leakage pathway according to the deposition dynamic model. The sharp decrease of solubility promotes the precipitation impetus while the deposition rate mainly depends upon the leakage velocity and pore structure. Local blockage may occur due to the accumulation of deposited particles, and the potential location is most likely to be near the outlet of the leakage pathway in current scenario. Sensitivity analyses indicate that pressure difference and temperature buildup would influence both the leakage velocity and deposition dynamics, while the pore structure of leakage pathway, represented by porosity and permeability, will affect the leakage characteristic so as to the deposition rate. The presented models are generic in nature for naphthalene transport, demonstrating a methodology that can explore the generation of a potential third organic phase in contaminant transport for risk assessments.
KeywordCO2 leakage Organic contaminant Naphthalene Deposition Transport model
DOI10.1016/j.ijggc.2019.102860
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics ; Energy & Fuels ; Engineering
WOS SubjectGreen & Sustainable Science & Technology ; Energy & Fuels ; Engineering, Environmental
WOS IDWOS:000504446800011
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64187
Collection石油化工学院
Corresponding AuthorLi, Jiyan
AffiliationLanzhou Univ Technol, Dept Chem Engn, Lanzhou 730050, Gansu, Peoples R China
First Author AffilicationLanzhou University of Technology
Corresponding Author AffilicationLanzhou University of Technology
First Signature AffilicationLanzhou University of Technology
Recommended Citation
GB/T 7714
Yang, Yong,Su, Xin,Fan, Zongliang,et al. Numerical investigation of naphthalene deposition dynamics during CO2 leakage[J]. INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL,2020,92.
APA Yang, Yong,Su, Xin,Fan, Zongliang,Wang, Dongliang,&Li, Jiyan.(2020).Numerical investigation of naphthalene deposition dynamics during CO2 leakage.INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL,92.
MLA Yang, Yong,et al."Numerical investigation of naphthalene deposition dynamics during CO2 leakage".INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL 92(2020).
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