Conversion of brown coal continuously supplied into the reactor as coal–water slurry in a supercritical water and water–oxygen mixture

Vostrikov, A. A.; Шишкин, А. В.; Sokol, M. Ya.; Dubov, D. Yu.; Fedyaeva, O. N.

doi:10.1016/j.supflu.2015.07.035

Cited by 19 publications

(3 citation statements)

References 34 publications

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“…During supercritical water, complex kerogen molecules gradually open to form molecular fragments and then gradually oxidize to form small molecules. In this process, the N element in kerogen is oxidized to form N 2 . In addition, according to Table , the average molecular weight of pyrolysis gas can be calculated from the weighted average.…”

Section: Resultsmentioning

confidence: 99%

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Experimental Investigation on the Pyrolysis and Conversion Characteristics of Organic-Rich Shale by Supercritical Water

Yao,

Meng,

Zhang

et al. 2023

ACS Omega

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Organic-rich shale oil reservoirs with low-medium maturity have attracted increasing attention because of their enormous oil and gas potential. In this work, a series of experiments on pyrolysis of the particle and core samples were carried out in a self-made supercritical water pyrolysis apparatus to evaluate the feasibility and benefits of supercritical water in promoting the transformation efficiency and oil yield of the low-medium maturity organic-rich shale. Core samples had a mass loss of 8.4% under supercritical water pyrolysis, and many microcracks were generated, which increased the pyrolysis efficiency substantially. The oil yield of shale pyrolysis could reach 72.40% under supercritical water conditions at 23 MPa and 400 °C, which was 53.02% higher than that under anhydrous conditions. In supercritical water conditions, oxygen-containing compounds are less abundant than in anhydrous conditions, suggesting that supercritical water can inhibit their formation. Also, supercritical water conditions produced higher yields for light fraction, medium fraction, and heavy fraction shale oil than those under anhydrous conditions. These results indicate that supercritical water pyrolysis is feasible and has excellent advantages for low-medium maturity organic-rich shale.

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Section: Resultsmentioning

confidence: 99%

“…In this process, the N element in kerogen is oxidized to form N 2 . 36 In addition, according to Table 3 , the average molecular weight of pyrolysis gas can be calculated from the weighted average. It is found that the average molecular weight of pyrolysis gas is 33.821 in ANH and 35.509 in supercritical water conditions.…”

Section: Resultsmentioning

confidence: 99%

Experimental Investigation on the Pyrolysis and Conversion Characteristics of Organic-Rich Shale by Supercritical Water

Yao,

Meng,

Zhang

et al. 2023

ACS Omega

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“…Higher temperatures 673 to 1033 K, and pressures, 30 MPa, were used for the supercritical extraction of brown coal from Russia, with conversion of 48% to 63% to liquid and gaseous products [38]. Russian brown coal was treated with supercritical water at 673 to 873 K for the production of combustible volatile products in a continuously supplied reactor [39,40]. Bitumen has been subjected to sub-and supercritical water extraction for the production of gaseous fuel, mainly hydrogen and carbon monoxide at supercritical conditions [41].…”

Section: Supercritical Extraction Applied To Fuelsmentioning

confidence: 99%

Extraction by Subcritical and Supercritical Water, Methanol, Ethanol and Their Mixtures

Marcus

2018

Separations

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Hot, subcritical and supercritical water, methanol, ethanol and their binary mixtures have been employed to treat fuels (desulfurize coal and recover liquid fuels from coal and oil shales) and to extract valuable solutes from biomass. The properties of these solvents that are relevant to their extraction abilities are presented. Various extraction methods: accelerated solvent extraction (ASE), pressurized liquid extraction (PLE), supercritical fluid extraction (SFE, but excluding supercritical carbon dioxide) with these solvents, including microwave-and ultrasound-assisted extraction, are dealt with. The extraction systems are extensively illustrated and discussed.

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An inclined plug-flow reactor design for supercritical water oxidation

Chen

Liu

et al. 2018

Chemical Engineering Journal

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Conversion of brown coal continuously supplied into the reactor as coal–water slurry in a supercritical water and water–oxygen mixture

Cited by 19 publications

References 34 publications

Experimental Investigation on the Pyrolysis and Conversion Characteristics of Organic-Rich Shale by Supercritical Water

Experimental Investigation on the Pyrolysis and Conversion Characteristics of Organic-Rich Shale by Supercritical Water

Extraction by Subcritical and Supercritical Water, Methanol, Ethanol and Their Mixtures

An inclined plug-flow reactor design for supercritical water oxidation

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