Effect of Steam and Hydrogen Pressure on Fixed-Bed Pyrolysis of Lignites and Oil Shales

Eki̇nci̇, Ekrem; Pütün, Ay¸E Eren; Citiroglu, M.; Lafferty, C.J.; Snape, Colin E.

doi:10.1016/b978-0-7506-0387-4.50132-7

Cited by 11 publications

(2 citation statements)

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“…For instance, at 520°C and using nitrogen the liquid yield was 11.84%, whereas the presence of steam increased the liquid yield up to 13.89%. Steam enhances the liquid yield by preventing retrogressive reactions that lead to char formation, probably via dehydrogenation of alkanes to alkenes and cyclization [28]. oil and these molecules, because of their higher stability, are resistant to thermal cracking [29].…”

Section: Resultsmentioning

confidence: 99%

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Effect of N₂ and CO₂ on shale oil from pyrolysis of Estonian oil shale

Mozaffari

Järvik

Baird

2021

International Journal of Coal Preparation and Utilization

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A kukersite oil shale sample from Estonia was pyrolyzed using a Fischer assay method under N2, N2/steam, CO2 and CO2/steam environments. The thermal behavior of the oil shale sample was also studied using TGA and DSC with similar conditions. Also, several properties of produced oils were measured and FTIR analysis was carried out to compare the molecular structure of the derived oils. The presence of steam increased the liquid and gaseous yields, and also caused a greater weight loss in the oil shale. The pyrolysis tests in both the CO2 and N2 atmospheres produced oils with relatively similar properties however, the molecular structure was different.

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Section: Resultsmentioning

confidence: 99%

“…The H/C ratio is helpful to identify whether the oil sample is aromaticor aliphatic-rich [34]. In general, a lower H/C ratio indicates that the produced oil contains more aromatics compounds [27], [28], [30]- [32]. A decrease in H/C ratio could be as a result of decrease in long-chain alkanes and increase in alkenes and aromatic content [35].…”

Section: Resultsmentioning

confidence: 99%