Preparation and catalytic performance of La0.3Sr0.7Fe0.7Cu0.2Mo0.1O3-δ ultrafine perovskite powder

被引：0

作者：

Meng, Bo ^{[1
]}

Hao, Gui-Zeng ^{[1
]}

Qin, Jing-Can ^{[1
]}

Tan, Xiao-Yao ^{[1
]}

机构：

[1] School of Chemical Engineering, Shandong University of Technology, Zibo , 255049, Shandong

来源：

Cailiao Gongcheng/Journal of Materials Engineering | 2014年 / 11期

关键词：

La[!sub]0.3[!/sub]Sr[!sub]0.7[!/sub]Fe[!sub]0.7[!/sub]Cu[!sub]0.2[!/sub]Mo[!sub]0.1[!/sub]O[!sub]3-δ[!/sub; POM; Solid electrolyte; Stability; Ultrafine ceramic powder;

D O I：

10.11868/j.issn.1001-4381.2014.11.009

中图分类号：

学科分类号：

摘要：

La0.3Sr0.7Fe0.7Cu0.2Mo0.1O3-δ (LSFCM) ultrafine perovskite powder with homogeneous composition was synthesized via sol-gel low temperature combustion process. The phase, morphology, particle size and electrical conductivity of samples were characterized by XRD, SEM and TA measurements. The effect of LSFCM powder on the catalytic activity and stability in the partial oxidation of methane (POM) into syngas was investigated. The results indicate that LSFCM ceramic powders with cubic perovskite structure and the mean particle size of less than 35 nm can be obtained by calcinations of sol-gel combustion ash at 800℃ for 4 h. The conductivity of the LSFCM oxide measured on a sintered body having the relative density of 96.7% reaches up to 26.27 S·cm-1 at 600℃ in air atmosphere. The LSFCM powders exhibit excellent catalytic activity and good stability to the partial oxidation of methane into syngas. The methane conversion and CO and H2 selectivities reach above 90% in the CH4/O2 feed ratio of 1.5-2.0 at 950℃. XRD and TA analysis reveal that the LSFCM powders still maintain the perovskite structure with a slight coke deposition after 43 h of reaction.

引用

页码：50 / 54

页数：4

共 21 条

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