Practical and Economic Aspects of the Ex-Situ Process: Implications for CO<sub>2</sub> Sequestration
Bibliographic record
Abstract
The risk of CO 2 leakage and the very slow rate of CO 2 dissolution in brine present major technical challenges for secure implementation of CO 2 sequestration at large scale in saline aquifers. To tackle these issues, a new technology based on Ex-Situ Dissolution Approach (ESDA) was developed recently aiming at dissolving CO 2 in brine phase prior to injection into the aquifer to eliminate or minimize the risk of leakage and accelerate CO 2 dissolution rate in brine. The ESDA is based on the mass transfer from CO 2 droplets into brine in cocurrent pipeline flow. This paper presents mass transfer modeling associated with the ESDA process concerning the evolution of the droplet size and the pressure change along the pipeline. In addition, a technical and economic feasibility of the ESDA in comparison with the standard carbon capture and storage (CCS) technologies is presented. Various aspects such as CO 2 displacement, geochemical reactions, CO 2 leakage, pressure build-up, well spacing, and dissolution efficiency for the ESDA are also discussed. This study enables the evaluation of the ESDA process for CO 2 sequestration through a systematic way.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".