期刊
FUEL
卷 137, 期 -, 页码 237-244出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2014.07.094
关键词
Extra-heavy oil; Vacuum residue; Hydrocracking; Dispersed catalyst; Tungsten disulfide
资金
- MSIP (Ministry of Science, ICT & Future Planning) of Korea - Korean Government [NRF-2012R1A2A1A03009667]
In this study, we tried hydrocracking of vacuum residue into lighter liquid oils using dispersed colloidal catalysts composed of nanosheet-structured WS2 materials. The vacuum residue of API gravity = 2.3 degrees was used as a reactant and hydrocracking reactions were performed in an autoclave batch reactor under 400 degrees C and the initial H-2 pressure of 70 bar. Both single and multi-layer WS2 nanosheet catalysts were tested and their activities were compared with those of bulk WS2 and MoS2 catalysts. The single-layer WS2, which was the highest in specific surface area (97.6 m(2)/g) due to its smallest particle size, showed the best performances in commercial fuel fraction yield (45.4 wt.%), C-5-asphaltene conversion (75.3%), API gravity of liquid product (13.8 degrees), and metal removal activity. To characterize the physicochemical properties of catalyst, various characterization techniques were applied, including transmission electron microscope (TEM), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) analysis. In addition, to assess the qualities of hydrocracking products, we carried out API gravity measurement, inductively coupled plasma-mass spectrometry (ICP-MS), and simulated distillation (SIMDIS) analysis. (C) 2014 Elsevier Ltd. All rights reserved.
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