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Record W2077770137 · doi:10.1021/je800066q

Equilibrium Studies for the System Methane + Carbon Dioxide + Neohexane + Water

2008· article· en· W2077770137 on OpenAlex
Juan G. Beltrán, Phillip Servio

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueJournal of Chemical & Engineering Data · 2008
Typearticle
Languageen
FieldEnvironmental Science
TopicMethane Hydrates and Related Phenomena
Canadian institutionsMcGill University
Fundersnot available
KeywordsMethaneChemistryCarbon dioxideMole fractionThermodynamicsHydrateClathrate hydrateThermodynamic equilibriumVapour pressure of waterWater vaporAtmospheric temperature rangeVapor pressureCarbon fibersEquilibrium constantInorganic chemistryPhysical chemistryOrganic chemistryMaterials science

Abstract

fetched live from OpenAlex

Four-phase equilibrium conditions (hydrate−liquid−liquid aq −vapor) were studied for the system methane + carbon dioxide + neohexane + water by the pressure search method. In addition, three-phase equilibrium conditions (hydrate−liquid−vapor) were determined for the same system in the absence of neohexane. Experimental conditions were varied in the temperature range of (275 to 285) K and the pressure range of (1.3 to 7.5) MPa. Equilibrium temperature and pressure values were found to agree, within the uncertainties herein reported, with existing literature values for both systems. The data were used to produce experimental contour plots that summarize the equilibrium temperature, pressure, and vapor composition on the same graph. It was observed that the equilibrium mole fraction of carbon dioxide in the vapor phase follows opposite trends in both systems, with respect to equilibrium pressure, at rather constant temperature. The data also suggest that hexagonal structure H equilibrium occurs at lower pressures and temperatures than cubic structure I (sI) when the vapor phase is methane rich; however, this phenomenon appears to be reversed as the equilibrium vapor phase becomes richer in carbon dioxide.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.082
Threshold uncertainty score0.279

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.039
GPT teacher head0.250
Teacher spread0.211 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it