Methane decomposition over iron-based catalysts in the presence of O2 and CO2

被引：16

作者：

Murata, K ^{[1
]}

Inaba, M ^{[1
]}

Saito, M ^{[1
]}

Takahara, I ^{[1
]}

Mimura, N ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Inst Green Technol, AIST Tsukuba Cent 5, Tsukuba, Ibaraki 3058565, Japan

来源：

JOURNAL OF THE JAPAN PETROLEUM INSTITUTE | 2003年 / 46卷 / 03期

关键词：

iron based catalyst; methane decomposition; hydrogen production; magnesium additive; oxidizing gas effect; catalyst stability;

D O I：

10.1627/jpi.46.196

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Methane decomposition was carried out using Fe/Al2O3 catalyst in the absence and presence Of O-2 and CO2. Even in the presence Of O-2 and CO2 (CH4/O-2/CO2 = 80/10/5 vol ratio), the deactivation of Fe/Al2O3 catalyst at temperatures below 1100 K was caused mainly by accumulation of carbon products as well as oxidation of nonoxide iron species (alpha-Fe and Fe3C), as confirmed by X-ray diffraction, TG/DTA, and in-situ DRIFT-IR analyses. The stability of Fe/Al2O3 catalyst in the presence Of O-2 and CO2 was improved by the addition of some metals into the catalyst (M/Fe = 1/1 wt ratio). Methane conversion decreased monotonously from 95 to 79% after 6 h for Fe/Al2O3 catalyst. In contrast, the activity of Fe/Mg/Al2O3 catalyst at 973 K remained unchanged after 6 h (CH4 conversion 95%). This effect could be associated with the formation of MgFe2O4. The effectiveness of other metal additives on the catalyst stability was Ce, Y > Eu, La > Pr, none > V > Nb.

引用

页码：196 / 202

页数：7

共 16 条

[1] Preparation of superacids by metal oxides for reactions of butanes and pentanes [J].