Comparison of Hydrodenitrogenation of Basic and Nonbasic Nitrogen Compounds Present in Oil Sands Derived Heavy Gas Oil
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Bibliographic record
Abstract
The hydrodenitrogenation of oil sands-derived heavy gas oil has been conducted in a trickle bed reactor over a commercial Ni−Mo/Al 2 O 3 catalyst in the temperature range of 365−415 °C, pressure in the range of 65−88 bar, liquid hourly space velocity in the range of 0.5−2 h - 1 . The hydrogen/heavy gas oil ratio has been changed from 400 to 1000 mL/mL. The study was conducted to determine the effects of these variables on the relative rates of conversion of total, basic, and nonbasic nitrogen compounds. It was observed that rate of conversion of nonbasic nitrogen compounds was lower than that of basic nitrogen compounds under identical process conditions. The pressure and hydrogen/heavy gas oil ratio have a more significant effect on the conversion of nonbasic nitrogen compound as compared to their effect on the conversion of basic nitrogen compounds. The effect of excess hydrogen sulfide on the conversion of basic and nonbasic nitrogen compounds has also been studied by adding butanethiol in the feed gas oil. An increase in the quantity of butanethiol decreases the conversion of both basic and nonbasic nitrogen compounds. It was also observed that in the region of higher space time (about 1.5−2 h), the conversion of nonbasic nitrogen compound increased at a sharp rate as compared to that of basic nitrogen compounds. This may be possibly due to the generation of more basic nitrogen compounds from the nonbasic ones. The kinetics of the conversion of nitrogen compounds has also been studied in the present work.
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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 it