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Title: EOSN: A TOUGH2 module for noble gases

Abstract

We developed a new fluid property module for TOUGH2, called EOSN, to simulate transport of noble gases in the subsurface. Currently, users may select any of five different noble gases as well as CO2, two at a time. For the three gas components (air and two user-specified noble gases) in EOSN, the Henry's coefficients and the diffusivities in the gas phase are no longer assumed constants, but are temperature dependent. We used the Crovetto et al. (1982) model to estimate Henry's coefficients, and the Reid et al. (1987) correlations to calculate gas phase diffusivities. The new module requires users to provide names of the selected noble gases, which properties are provided internally. There are options for users to specify any (non-zero) molecular weights and half-lives for the gas components. We provide two examples to show applications of TOUGH2IEOSN. While temperature effects are relatively insignificant for one example problem where advection is dominant, they cause almost an order of magnitude difference for the other case where diffusion becomes a dominant process and temperature variations are relatively large. It appears that thermodynamic effects on gas diffusivities and Henry's coefficients can be important for low-permeability porous media and zones with large temperature variations.

Authors:
;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
Assistant Secretary for Energy Efficiency and RenewableSolar and Renewable Resource Technologies
OSTI Identifier:
928424
Report Number(s):
LBNL-52379
R&D Project: G31902; BnR: EB4001000; TRN: US0803439
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
46; ADVECTION; AIR; DIFFUSION; MOLECULAR WEIGHT; RARE GASES; TEMPERATURE DEPENDENCE; THERMODYNAMICS; TRANSPORT

Citation Formats

Shan, Chao, and Pruess, Karsten. EOSN: A TOUGH2 module for noble gases. United States: N. p., 2003. Web. doi:10.2172/928424.
Shan, Chao, & Pruess, Karsten. EOSN: A TOUGH2 module for noble gases. United States. doi:10.2172/928424.
Shan, Chao, and Pruess, Karsten. Fri . "EOSN: A TOUGH2 module for noble gases". United States. doi:10.2172/928424. https://www.osti.gov/servlets/purl/928424.
@article{osti_928424,
title = {EOSN: A TOUGH2 module for noble gases},
author = {Shan, Chao and Pruess, Karsten},
abstractNote = {We developed a new fluid property module for TOUGH2, called EOSN, to simulate transport of noble gases in the subsurface. Currently, users may select any of five different noble gases as well as CO2, two at a time. For the three gas components (air and two user-specified noble gases) in EOSN, the Henry's coefficients and the diffusivities in the gas phase are no longer assumed constants, but are temperature dependent. We used the Crovetto et al. (1982) model to estimate Henry's coefficients, and the Reid et al. (1987) correlations to calculate gas phase diffusivities. The new module requires users to provide names of the selected noble gases, which properties are provided internally. There are options for users to specify any (non-zero) molecular weights and half-lives for the gas components. We provide two examples to show applications of TOUGH2IEOSN. While temperature effects are relatively insignificant for one example problem where advection is dominant, they cause almost an order of magnitude difference for the other case where diffusion becomes a dominant process and temperature variations are relatively large. It appears that thermodynamic effects on gas diffusivities and Henry's coefficients can be important for low-permeability porous media and zones with large temperature variations.},
doi = {10.2172/928424},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {3}
}