钙钛矿型氧化物LaFeO_3的制备及甲烷化学链燃烧性能  

Preparation of perovskite oxide LaFeO_3 and its performances for chemical-looping combustion of methane

作　　者：李新爱[1,2] 何方[1] 赵坤[1] 黄振[1] 李海滨[1] 

机构地区：[1]中国科学院广州能源研究所,中国科学院可再生能源与天然气水合物重点实验室,广东广州510640 [2]中国科学院研究生院,北京100049

出　　处：《天然气化工—C1化学与化工》2012年第6期1-6,共6页Natural Gas Chemical Industry

基　　金：国家自然科学基金资助项目(51076154)

摘　　要：选择燃烧法制备了钙钛矿型氧化物LaFeO3,采用XRD、FT-IR、H2-TPR、SEM等手段对所制备的LaFeO3进行了表征。并在热重反应器上通过甲烷-空气切换反应对LaFeO3钙钛矿型氧化物的循环反应性能进行了研究。结果表明,LaFeO3钙钛矿型氧化物具有良好的循环反应性能,多次循环反应后,钙钛矿型氧化物的晶相结构和微观形貌没有发生明显变化。通过Sr掺杂制备的La0.9Sr0.1FeO3钙钛矿型氧化物具有更好的供氧能力。LaFeO3 perovskite-type oxides were prepared by using combustion method, and XRD, FT-IR, H2-TPR and SEM were used to characterize the samples. The redox eapabihty of LaFeO3 reacting with CHa and air respectively was investigated in a thermal gravimetrieal analysis （TGA） reactor. The results indicated that LaFeO3 perovskite oxides showed excellent stability of cycles. After successive redox reactions, crystal phase structure and micro-morphology of perovskite oxide were not significantly changed. La0.9Sr0.1FeO3 synthesized by doping of Sr exhibited better oxygen transport ability.

关 键 词：甲烷 钙钛矿 晶格氧 化学链燃烧 

分 类 号：O643[理学—物理化学]