New hybrid CNT-alumina supports for Co-based Fischer-Tropsch catalysts

被引：33
|
作者：
Chernyak, Sergei A. [1 ,2 ]
Suslova, Evgeniya V. [2 ]
Egorov, Alexander V. [2 ]
Lu, Li [3 ]
Savilov, Serguei V. [1 ,2 ]
Lunin, Valery V. [1 ,2 ]
机构：
[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia
[2] Russian Acad Sci, NS Kurnakov Gen & Inorgan Chem Inst, Moscow 119991, Russia
[3] Natl Univ Singapore, Dept Mech Engn, Singapore 117575, Singapore
来源：
FUEL PROCESSING TECHNOLOGY | 2015年 / 140卷
基金：
俄罗斯基础研究基金会;
关键词：
Fischer-Tropsch synthesis; Nanocomposites; Carbon nanotubes; Co-based catalysts; Synthetic liquid fuels; COBALT PARTICLE-SIZE; MULTIWALLED CARBON NANOTUBES; HYDROGENATION; DEACTIVATION; HYDROCARBONS; OXIDATION; MONOXIDE; BEHAVIOR; WATER;
D O I：
10.1016/j.fuproc.2015.09.012
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Carbon nanotubes-alumina (CNT-Al2O3) composite was synthesized by catalytic pyrolysis of methane over Co/Al2O3 particles. Surface of the composite was further modified by oxygen-containing groups through oxidation in H2O2 solution. Resulted materials were investigated by nitrogen adsorption, scanning electron microscopy, thermal analysis and X-ray photoelectron spectroscopy. Catalysts (based on non-oxidized and oxidized composites, CNTs and alumina) obtained by Co impregnation were characterized by temperature-programmed reduction and transmission electron microscopy. As a comparative study, Co-catalysts for Fischer-Tropsch synthesis were made under ambient pressure and between 190 and 220 degrees C. It was observed that activity and selectivity of the catalysts are dependent on the nature of the supports. Particle size distribution of Co was found to be dependent on the structure of the support and chemical composition of the surface. CNT-Al2O3 demonstrated the highest C5+-fraction yield while the yield decreased in a range of CNT-Al2O3 > oxidized CNTs > Al2O3 > CNTs > oxidized CNT-Al2O3. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：267 / 275
页数：9
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