无气相氧条件下La_(0.8)Sr_(0.2)Fe_(0.9)Co_(0.1)O_3钙钛矿氧化物的氧物种直接氧化甲烷  

Direct Methane Oxidation in the Absence of Gaseous Oxygen Using La_(0.8)Sr_(0.2)Fe_(0.9)Co_(0.1)O_3 Perovskite Oxide as the Oxygen Carrier

作　　者：代小平[1] 余长春[1] 吴琼[1] 

机构地区：[1]中国石油大学(北京)CNPC催化重点实验室,北京102249

出　　处：《催化学报》2008年第10期954-956,共3页

基　　金：国家自然科学基金(20306016)

摘　　要：以La0.8Sr0.2Fe0.9Co0.1O3钙钛矿氧化物作氧载体,采用连续流动反应和连续顺序Redox反应考察了氧物种氧化甲烷的反应性能.结果表明,连续流动反应中La0.8Sr0.2Fe0.9Co0.1O3氧化物的氧物种能选择氧化甲烷生成合成气.在适宜的再氧化条件下,通过连续顺序Redox反应实现了La0.8Sr0.2Fe0.9Co0.1O3氧化物的氧物种氧化甲烷连续生成合成气,消耗的氧物种可通过与气相氧反应而得到补充.但随着Redox反应的进行,氧化物的持续供氧性能下降,钙钛矿结构被破坏.Methane oxidation using La0.8Sr0.2Fe0.9Co0.1O3 perovskite as the oxygen carrier in the absence of gaseous oxygen was explored. Continuous flow reaction indicated that the La0.8Sr0.2Fe0.9Co0.1O3 perovskite can provide oxygen species to oxidize CH4 to synthesis gas with high selectivity in the absence of gaseous oxygen. Under the appropriate reaction conditions, production of synthesis gas by sequential redox cycles over the La0.8Sr0.2Fe0.9Co0.1O3 perovskite was possible. Oxygen species can be replenished by gaseous oxygen, but the structural stability and oxygen supply decreased with further redox reaction over the La0.8Sr0.2Fe0.9Co0.1O3 oxide.

关 键 词：La0.8Sr0.2Fe0.9Co0.1O3 钙钛矿 氧载体 甲烷 合成气 氧化还原反应 

分 类 号：TE665.3[石油与天然气工程—油气加工工程]