天然气化工（C1化学与化工）
天然氣化工（C1化學與化工）
천연기화공（C1화학여화공）
Natural Gas Chemical Industry
2015年
4期
44-48
,共5页
催化燃烧%甲烷%钙钛矿%锶参杂%La1-xSrxCoO3-d%催化活性
催化燃燒%甲烷%鈣鈦礦%鍶參雜%La1-xSrxCoO3-d%催化活性
최화연소%갑완%개태광%송삼잡%La1-xSrxCoO3-d%최화활성
catalytic combustion%methane%perovskite%Sr doping%La1-xSrxCoO3-d%catalytic activity
采用柠檬酸络合方法，在焙烧温度700~900℃下，制备得到了单一物相的钙钛矿型La1-xSrxCoO3-d（x=0.0,0.1）复合金属氧化物。利用XRD、TPR、XPS等方法对样品进行了表征。考察了Sr参杂和焙烧温度对催化剂催化甲烷燃烧活性的影响。结果表明，与LaCoO3样品比较，掺Sr样品具有较多的低温活性氧和较高的表面钴含量，因而表现出了较高的甲烷催化燃烧活性。在700~900℃焙烧温度范围，甲烷催化燃烧转化率随焙烧温度升高而下降。
採用檸檬痠絡閤方法，在焙燒溫度700~900℃下，製備得到瞭單一物相的鈣鈦礦型La1-xSrxCoO3-d（x=0.0,0.1）複閤金屬氧化物。利用XRD、TPR、XPS等方法對樣品進行瞭錶徵。攷察瞭Sr參雜和焙燒溫度對催化劑催化甲烷燃燒活性的影響。結果錶明，與LaCoO3樣品比較，摻Sr樣品具有較多的低溫活性氧和較高的錶麵鈷含量，因而錶現齣瞭較高的甲烷催化燃燒活性。在700~900℃焙燒溫度範圍，甲烷催化燃燒轉化率隨焙燒溫度升高而下降。
채용저몽산락합방법，재배소온도700~900℃하，제비득도료단일물상적개태광형La1-xSrxCoO3-d（x=0.0,0.1）복합금속양화물。이용XRD、TPR、XPS등방법대양품진행료표정。고찰료Sr삼잡화배소온도대최화제최화갑완연소활성적영향。결과표명，여LaCoO3양품비교，참Sr양품구유교다적저온활성양화교고적표면고함량，인이표현출료교고적갑완최화연소활성。재700~900℃배소온도범위，갑완최화연소전화솔수배소온도승고이하강。
Perovskite-type La1-xSrxCoO3-d (x=0.0, 0.1) composite oxides were prepared by citrate method and calcination at 700℃-900℃, and characterized by XRD, TPR and XPS. The effects of Sr doping and calcination temperature on the catalytic activity of the catalysts for combustion of methane were investigated. The results showed that compared with no Sr doping, the addition of Sr led to formation of more oxygen species with a higher reactivity at a lower temperature, and also to a higher content of cobalt on crystallite surface of the samples, which resulted in a higher catalytic activity for combustion of methane. The catalytic activity decreased with the increase of calcination temperature in the range of 700℃to 900℃.
