Zheng, W;
Mahgerefteh, H;
Martynov, S;
Brown, S;
(2017)
Modeling of CO2 Decompression across the Triple Point.
Industrial and Engineering Chemistry Research
, 56
(37)
pp. 10491-10499.
10.1021/acs.iecr.7b02024.
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Abstract
The formation of significant quantities of solid CO 2 as a result of surpassing its triple point during rapid decompression of CO 2 pipelines employed as part of the carbon capture and sequestration (CCS) chain can present serious operational and safety challenges. In this paper, the development, testing and validation of a rigorous computational fluid dynamics (CFD) flow model for predicting solid CO 2 formation during decompression is presented. Multiphase flow is modeled by assuming homogeneous equilibrium, and the pertinent thermodynamic data are computed using real-fluid equations of state. The flow model is validated against pressure and temperature data recorded during the decompression of an extensively instrumented 144 m long, 150 mm i.d. CO 2 pipe initially at 5.25 °C and 153.3 bar. For the conditions tested, the simulated results indicate CO 2 solid mass fractions as high as 35% at the rupture plane, whose magnitude gradually decreases with distance toward the pipe's intact end.
| Type: | Article |
|---|---|
| Title: | Modeling of CO2 Decompression across the Triple Point |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.iecr.7b02024 |
| Publisher version: | http://doi.org/10.1021/acs.iecr.7b02024 |
| Language: | English |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10023441 |
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