caa a22 4500 463253264 CHVBK 20180405153346.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10562-007-9164-z doi (NATIONALLICENCE)springer-10.1007/s10562-007-9164-z The Production of Straight Carbon Microfibers by the Cracking of Methane over Co-SBA-15 Catalysts [Elektronische Daten] [Lizen Gao, Sibudjing Kawi] Cobalt incorporated SBA-15 (Co-SBA-15) catalysts were prepared by using hydrothermal synthesis and over which very straight carbon microfibers were made by cracking CH4. The influence of Co loading (from 0.5 to 3wt%) in SBA-15 and cracking temperature on the methane conversion, structures and morphologies of the microfibers was investigated. The highest yield of microfibers was obtained at 800°C over the 2wt% Co loaded SBA-15 catalyst. After 16h reaction, the carbon fibers almost stopped further growth. The diameter of the carbon microfibers could be roughly controlled by judiciously adjusting the Co concentration in SBA-15. The carbon microfiber's growth followed a root-growth mechanism. XRD, HRTEM and Raman studies confirmed that the microfibers were graphitic. The microfiber grown over the 0.5wt% cobalt loaded SBA-15 catalyst had a higher degree of graphitic structural order than that obtained over the 2wt% cobalt loaded one. Springer Science+Business Media, LLC, 2007 Co-SBA-15 nationallicence Methane cracking nationallicence Carbon microfibers nationallicence Graphitic carbon nationallicence Gao Lizen School of Mechanical Engineering M050, The University of Western Australia, 35 Stirling Highway, 6009, Crawley, WA, Australia aut Kawi Sibudjing Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117576, Singapore, Republic of Singapore aut Catalysis Letters Springer US; http://www.springer-ny.com 118/3-4(2007-10-01), 211-218 1011-372X 118:3-4<211 2007 118 10562 https://doi.org/10.1007/s10562-007-9164-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9164-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gao Lizen School of Mechanical Engineering M050, The University of Western Australia, 35 Stirling Highway, 6009, Crawley, WA, Australia aut NATIONALLICENCE 700 1- Kawi Sibudjing Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117576, Singapore, Republic of Singapore aut NATIONALLICENCE 773 0- Catalysis Letters Springer US; http://www.springer-ny.com 118/3-4(2007-10-01), 211-218 1011-372X 118:3-4<211 2007 118 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer