Numerical investigation of naphthalene deposition dynamics during CO2 leakage | |
Yang, Yong; Su, Xin; Fan, Zongliang; Wang, Dongliang; Li, Jiyan | |
刊名 | INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL |
2020-01 | |
卷号 | 92 |
关键词 | CO2 leakage Organic contaminant Naphthalene Deposition Transport model |
ISSN号 | 1750-5836 |
DOI | 10.1016/j.ijggc.2019.102860 |
英文摘要 | An 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. |
WOS研究方向 | Science & Technology - Other Topics ; Energy & Fuels ; Engineering |
语种 | 英语 |
出版者 | ELSEVIER SCI LTD |
WOS记录号 | WOS:000504446800011 |
状态 | 已发表 |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/64187] |
专题 | 石油化工学院 |
通讯作者 | Li, Jiyan |
作者单位 | Lanzhou Univ Technol, Dept Chem Engn, Lanzhou 730050, Gansu, Peoples R China |
推荐引用方式 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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