期刊
FUEL
卷 254, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2019.05.165
关键词
Molybdenum nitride; Molybdenum carbide; Hydrotreatment; Sulfur; Vegetable oil; Co-processing
资金
- Ministry of Education, Youth and Sports of the Czech Republic (MEYS) through National Sustainability Programme I [LO1606]
- MEYS [LM2015039]
Generally, the commercial catalysts for hydrotreatment in refineries are supported sulfide transition-metal-based catalysts. However, the co-processing of vegetable oils reduces their hydrodesulfurization (HDS) efficiency by leaching sulfur from the active sites of the catalyst. The present work reports the use of six sulfur-free MoCx and MoNx catalysts (supporter with Al2O3, TiO2 or ZrO2) for the hydrotreatment of atmospheric gasoil (AGO) and co-processing of rapeseed oil (RSO-5, 10 and 25 wt%). The screening tests were carried out in a fixed bed reactor at industrial operating conditions (330-350 degrees C, 5.5 MPa, WHSV= 1-2 h(-1)). Higher reaction temperatures and lower WHSV had a positive effect on catalyst activity and product quality. In case of co-processing, the hydrodeoxygenation reaction mechanism was found to be dominant, producing n-C-16 and n-C-18 n-alkanes at all AGO/RSO ratios used. Overall, our results suggest that alumina supported catalysts are the most promising materials, exhibiting a combination of excellent stability, high activity and no negative effects on HDS efficiency during AGO/RSO co-processing.
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