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Catalytic hydrocracking of bitumen at mild experimental condition
윤송훈,최원춘,박용기,김희영,이철위 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.1
Mo-containing catalysts were prepared by impregnation method using silica-based porous supports and their physical properties were characterized by BET, XRD and TEM. Catalytic hydrocracking of bitumen extracted from oil sand was carried out in a high pressure reactor using Athabasca oil sand over 5 wt% Mo containing catalyst supported on SiO2, MCF(Meso Cellular Foam) and SBA-15, respectively, under the conditions of 200 oC, 20 h and 10 atm of H2 gas. Catalytic hydrocracking activity was estimated by analyzing H/C mole ratio based on EA data, and TGA was employed to compare the thermal behavior of bitumen before and after reaction. Upon hydrocracking over Mo/MCF catalyst, H/C was increased from 1.50 (bitumen itself) to 1.66.
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하성민,황기범,김대섭,윤송훈,이영석 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.117 No.-
In this study, modification is performed with pyrolyzed fuel oil to analyze the constituent components ofpetroleum residue oil (PRO), and carbon coating are performed on SiOx surfaces through vapor depositionto determine the effects of the aromatic compounds from the PRO. The effects of the carbon-coating fromPRO on the electrochemical performance of a lithium-ion battery are also examined. Carbon-coating layerswith amorphous structures and thicknesses of 13.8 to 24.6 nm are obtained depending on the depositiontemperature. After 50cycles, the coulombic efficiency of the sample is 99.8 %, the initial cyclecapacity is 1095.4 mAh/g at a current density of 1.0C. The rate test results for this sample showing acapacity of 417.4 mAh/g at a current density of 2.0C. This is attributing to the formation of a thickcarbon-coating layer on the sample’s surface, which maintaining the stability of the sample’s structureand suppressing volume expansion. The impedance of this sample also shows the lowest resistance at189.2 X, indicating a better electrochemical performance compared to those of the others. Since 250PRO contains more 2,3-cycle aromatic compounds than other samples, it is much easier to form thepoly-aromatic compound when forming the carbon coating layer of SiOx, thereby improving electricalconductivity and lithium ion diffusion.
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