Kinetics of carbon multi-wall nanotube synthesis by catalytic pyrolysis of methane

被引：0
|
作者：
Rakov, EG [1 ]
Ivanov, IG [1 ]
Blinov, SN [1 ]
Kazakov, NV [1 ]
Skudin, VV [1 ]
Digurov, NG [1 ]
Bogdanovich, AK [1 ]
机构：
[1] DI Mendeleev Univ Chem Technol Inst, Dept Nanotechnol, Moscow 125047, Russia
来源：
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES | 2004年 / 12卷 / 1-2期
基金：
俄罗斯基础研究基金会;
关键词：
nanotubes; nanofibers; methane; catalytic pyrolysis;
D O I：
10.1081/FST-120027129
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
By method of isothermal gravimetry at 600-700 C, CH4 concentration 32-100% in Ar and 91-100% in H-2 under atmospheric pressure the kinetics of CH4 pyrolysis under Ni/La2O3 catalysts is studied. Estimated apparent activation energy of reaction is 73 kJ/mol for fresh catalyst and 71 kJ/mol for aged one. The reaction order on CH4 changes from 1.05 at 600degreesC to 1.3 at 700degreesC. The influence of H-2 concentration on the reaction rate is more complicated. On the basis of kinetics measurements continuously working laboratory-scale reactor with gas and catalyst counter-flow is constructed and tested.
引用
收藏
页码：29 / 32
页数：4
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