Journal
MATERIALS TODAY COMMUNICATIONS
Volume 10, Issue -, Pages 67-71Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mtcomm.2017.01.004
Keywords
Cobalt; Support; Fischer-Tropsch reaction
Categories
Funding
- Ministry of Science, Technology and Innovation [03-02-02-SF0036]
- FRGS [FRGS/1/2012/SG01/UTP/02/01]
- Universiti Teknologi PETRONAS [31/09.10]
- Gas Processing Centre, College of engineering, Qatar University, Qatar
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In this paper, comparative investigations of the effects of CNTs and gamma-Al2O3 on the physicochemical properties and catalytic performances of Co based nano-catalyst during FTS have been presented. Catalysts were prepared via a wet impregnation method and characterized by various analytical techniques such as transmission electron microscopy (TEM), temperature programmed reduction (H-2-TPR), carbon dioxide temperature programmed desorption (CO2-TPD) and X-ray photoelectron spectroscopy (XPS). Fischer-Tropsch reaction (FTS) was carried out in a fixed-bed microreactor (220 degrees C and 1 atm and with H-2/CO = 2 v/v, SV of 12 L/g h). Various characterization techniques revealed that Co nanocatalysts supported on CNTs and Al2O3 were different in physicochemical properties. There was a stronger interaction between Co and Al2O3 support compared to that of CNTs support. CNTs support increased the reducibility, dispersion, active metal surface area and decreased Co particle size. A significant increase in% CO conversion and FTS reaction rate was also observed over CNTs support compared to that of Co/Al2O3. Co/CNTs resulted in higher C5+ hydrocarbons selectivity compared to that of Co/Al2O3 catalyst. (C) 2017 Elsevier Ltd. All rights reserved.
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