标题：Preparation and catalytic performance of La0.3Sr0.7Fe0.7Cu0.2Mo0.1O3-δultrafine perovskite powder
作者：Meng, Bo ;Hao, Gui-Zeng ;Qin, Jing-Can ;Tan, Xiao-Yao
作者机构：[Meng, Bo ;Hao, Gui-Zeng ;Qin, Jing-Can ;Tan, Xiao-Yao ] School of Chemical Engineering, Shandong University of Technology, Zibo; Shandong; 255049, Ch 更多
来源：Cailiao Gongcheng/Journal of Materials Engineering
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-1at 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 H2selectivities reach above 90% in the CH4/O2feed 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.