Effect of support surface treatment on the synthesis, structure, and performance of Co/CNT Fischer–Tropsch catalysts
作者： Thomas O. Eschemann , Wouter S. Lamme , Rene L. Manchester , Tanja E. Parmentier , Andrea Cognigni
DOI: 10.1016/J.JCAT.2014.12.010
关键词: X-ray absorption spectroscopy 、 Chemistry 、 Catalysis 、 Carbon nanotube 、 Cobalt 、 Cobalt oxide 、 Incipient wetness impregnation 、 Particle 、 Fischer–Tropsch process 、 Chemical engineering 、 Inorganic chemistry
摘要: We report the preparation of supported cobalt catalysts (9 wt% Co) on untreated (CNT) and surface-oxidized (CNT-ox) carbon nanotube materials by incipient wetness impregnation with solutions nitrate in water, ethanol, or 1-propanol. The results show that a judicious selection solvent drying method, similar oxide particle sizes range 4–5 nm CNT CNT-ox were obtained for fresh catalysts. Cobalt particles unfunctionalized showed higher initial activities C5+-selectivities than functionalized CNT; however, former more prone to growth due lack anchoring sites. after 60 h stream revealed larger 6 turnover frequencies (TOF) 0.07 s−1 Co/CNT 0.03 Co/CNT-ox. In situ XAS/XRPD studies degree reduction oxidized formation hcp metal which rationalizes activity TOF
core.ac.uk
narcis.nl
elsevier.com参考文章(59)
M.E. Dry, FT catalysts Fischer-Tropsch Technology. ,vol. 152, pp. 533- 600 ,(2004) , 10.1016/S0167-2991(04)80464-6
Burtron H. Davis, Cobalt FT Catalysts Wiley‐VCH Verlag GmbH & Co. KGaA. pp. 193- 207 ,(2013) , 10.1002/9783527656837.CH9
Enrique Iglesia, Design, synthesis, and use of cobalt-based Fischer-Tropsch synthesis catalysts Applied Catalysis A: General. ,vol. 161, pp. 59- 78 ,(1997) , 10.1016/S0926-860X(97)00186-5
Tingjun Fu, Zhenhua Li, Highly dispersed cobalt on N-doped carbon nanotubes with improved Fischer–Tropsch synthesis activity Catalysis Communications. ,vol. 47, pp. 54- 57 ,(2014) , 10.1016/J.CATCOM.2014.01.008
Shankhamala Kundu, Yuemin Wang, Wei Xia, Martin Muhler, Thermal Stability and Reducibility of Oxygen-Containing Functional Groups on Multiwalled Carbon Nanotube Surfaces: A Quantitative High-Resolution XPS and TPD/TPR Study Journal of Physical Chemistry C. ,vol. 112, pp. 16869- 16878 ,(2008) , 10.1021/JP804413A
R.W. Gosselink, R. van den Berg, W. Xia, M. Muhler, K.P. de Jong, J.H. Bitter, Gas phase oxidation as a tool to introduce oxygen containing groups on metal-loaded carbon nanofibers Carbon. ,vol. 50, pp. 4424- 4431 ,(2012) , 10.1016/J.CARBON.2012.05.020
Mark E Dry, High quality diesel via the Fischer–Tropsch process – a review Journal of Chemical Technology & Biotechnology. ,vol. 77, pp. 43- 50 ,(2002) , 10.1002/JCTB.527
Ali Karimi, Bahram Nasernejad, Ali Morad Rashidi, Ahmad Tavasoli, Mahnaze Pourkhalil, Functional group effect on carbon nanotube (CNT)-supported cobalt catalysts in Fischer–Tropsch synthesis activity, selectivity and stability Fuel. ,vol. 117, pp. 1045- 1051 ,(2014) , 10.1016/J.FUEL.2013.10.014
Shreyas Rane, Øyvind Borg, Erling Rytter, Anders Holmen, Relation between hydrocarbon selectivity and cobalt particle size for alumina supported cobalt Fischer–Tropsch catalysts Applied Catalysis A-general. ,vol. 437, pp. 10- 17 ,(2012) , 10.1016/J.APCATA.2012.06.005
G BEZEMER, P RADSTAKE, V KOOT, A VANDILLEN, J GEUS, K DEJONG, Preparation of Fischer–Tropsch cobalt catalysts supported on carbon nanofibers and silica using homogeneous deposition-precipitation Journal of Catalysis. ,vol. 237, pp. 291- 302 ,(2006) , 10.1016/J.JCAT.2005.11.015