摘要
采用ＴＰＲ、ＸＲＤ、ＳＥＭ等技术考察了不同焙烧温度Ｎｉ／Ａｌ２Ｏ３催化剂活性组分和载体间的相互作用及甲烷部分氧化活性、还原性能、相组成及镍的分散度。结果表明低温焙烧的催化剂具有易还原的特点而高温焙烧的催化剂，由于活性组分Ｎｉ与Ａｌ２Ｏ２载体间较强的相互作用而使催化剂表面几乎全部形成了难以还原的ＮｉＡｌ２Ｏ４尖晶石。对于低温高空速甲烷部分氧化反应，Ｎｉ－９００活性优于其他催化剂活性。
The reactivity of Ni/Al2O3 catalysts for methane partial oxidation has been studied by usingfixed-bed reactor. The active component -support interaction of Ni/Al2O3 catalysts calcined atdifferent temperatures,reducibility,phase composition and nickel dispersions were considered inconjunction with the result of TPR SEM and XRD .The results show that the catalysts calcinedat low temperatures is easy to be reduced .The formation of NiAl2O4 surface spinel as the main fooDmposi6onontbes恤oeofca柏加枯肋tb蛐ence of strong active component -support interaction when the catalysts were treated at hightemperatures.It was observed that during the reaction of methane partial oxidation at lowtemperature and high space velocity only the catalytic activity of Ni-900 catalyst is best .
出处
《哈尔滨师范大学自然科学学报》
CAS
1997年第1期96-101,共6页
Natural Science Journal of Harbin Normal University
