铬掺杂钴酸镧催化剂制备及其甲烷催化燃烧性能

Catalytic Combustion Capability to Methane of Cr-Doping LaCo_(1-y)Cr_yO_3 Catalyst

用共沉淀-喷雾干燥法制备了Cr部分取代Co的LaCo1-yCryO3(y=0.0～0.5)系列钙钛矿型复合氧化物催化剂,采用BET比表面积、XRD,SEM等方法对催化剂粉体材料进行了形貌和结构的表征分析;测定了对甲烷催化燃烧的催化活性,探讨了掺杂对催化剂热稳定性的影响。研究表明,钴酸镧掺铬后,掺铬的催化剂具有良好的高温催化活性,且热稳定性增强。

Perovskite-oxides LaCo1-yCryO3(y=0.0～0.5) catalytic materials were prepared by co-precipitation spray-drying method.The Cr-doping effect was studied in series LaCo1-yCryO3 materials by BET,XRD,SEM techniques.The catalytic activity for CH4 of these catalysts were measured and the thermal-stability was discussed in brief.The results showed that the catalytic materials Cr-doping had great catalytic activity and excellent thermal-stability in high temperature.