Gasification behavior of catalytic filamentous carbon

被引：9

作者：

Avdeeva, LB ^{[1
]}

Reshetenko, TV ^{[1
]}

Fenelonov, VB ^{[1
]}

Chuvilin, AL ^{[1
]}

Ismagilov, ZR ^{[1
]}

机构：

[1] Boreskov Inst Catalysis, Novosibirsk 630090, Russia

来源：

CARBON | 2004年 / 42卷 / 12-13期

关键词：

carbon filaments; carbon nanotubes; gasification; adsorption; texture;

D O I：

10.1016/j.carbon.2004.05.049

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：

The paper reports on the effect of the catalytic filamentous carbon (CFC) gasification on its textural properties. CFC samples were prepared by methane decomposition over metal catalysts (Ni, Co, Ni-Cu, Fe-Co-alumina) at 500-625 degreesC. With respect to the ease of hydrogasification, CFC samples of different types can be arranged in the following order: CFC (Co)>CFC (Fe-Co) = CFC (Nimuch greater thanCFC (Ni-Cu, 575 degreesC). The order of their activity in oxidation with CO2 is: CFC (Co)>CFC (Ni)>CFC (Ni-Cu, 575 degreesC)>CFC (Fe-Co). When all studied types of CFC are activated in the presence Of CO2 or H-2, changes in the volume of micropores and fine mesopores (3-4 nm) are minimal and do not depend on the treatment conditions. The main observed changes are related to the development of large mesopores, macropores and increase of the CFC surface area by a factor of 1.1-1.5. The development of large mesopores with D > 10 nm appears to result from gasification of less ordered graphene packages of the filaments with sizes about 10-30 nm. A slight increase of the microporosity is observed after the CFC treatment with HNO3 at 100 degreesC. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：2501 / 2507

页数：7

共 36 条

[11] Structure and texture of filamentous carbons produced by methane decomposition on Ni and Ni-Cu catalysts [J].