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- W3091201866 abstract "• Hierarchical clin/SBA-15 composites were prepared by using clinoptilolite as Al source. • E a of n-C16 aqueous conversion on clin/SBA-15 was 35 kJ/mol, less than that of non-catalytic cracking. • In oil shale conversion derived oil, C35+ were notably declined with catalyst under subcritical water. • Oil shale catalytic conversion produced oil with a strongly aliphatic nature. • The oil product showed H/C ratio rising (1.98 to 2.08) and O/C ratio declining (0.06 to 0.02). The massive reserves of oil shale in China offer the potential to lessen energy dependence on conventional sources. A novel oil shale in situ upgrading process over mineral-based clin/SBA-15 catalysts has been proposed, and catalytic pyrolysis behavior was intensively studied. Clinoplilolite was chosen for clin/SBA-15 preparation. The apparent activation energy E a of hexadecane cracking on clin/SBA-15(3.0) is 90.37 kJ/mol that is 35 kJ/mol less than that of thermal cracking. DSC curves of n-C16 conversion under 3 MPa N 2 reveals that the cracking peak temperature was declined to 365 °C and 372 °C from 417 °C (thermally) on clin/SBA-15 and kaolin/SBA-15, respectively. The extracted kerogen was converted at 280 °C with a biphasic solvent (water and decalin) to mimic the hydrocarbon generation process, and the products were mainly concentrated in C9, C10 and C11. Oil shale conversion was carried out at 280 °C under subcritical water. Non-catalytic converted products mainly contains hydrocarbons (34.01 %), long-chain fatty acids (esters), alcohol, and ketones. Catalytically produced oil have a strongly aliphatic nature, and the hydrocarbon yield is up to 70.50 % for clin/SBA-15. The clin/SBA-15 played a remarkable role on H/C ratio rising (1.98–2.08) and O/C ratio declining (0.10 to 0.04) because of the catalytic decarboxylation. Clin/SBA-15 showed no activity decay on seven-day oil shale aqueous conversion test." @default.
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- W3091201866 date "2020-11-01" @default.
- W3091201866 modified "2023-09-29" @default.
- W3091201866 title "Oil shale in situ catalytic conversion over clin/SBA-15 composites under subcritical water" @default.
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- W3091201866 doi "https://doi.org/10.1016/j.jaap.2020.104942" @default.
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