摘要
研究了稀土金属氧化物（Ｌａ２Ｏ３，ＣｅＯ２，Ｐｒ６Ｏ１１和Ｎｄ２Ｏ３）对Ｎｉ／α－Ａｌ２Ｏ３催化剂上甲烷部分氧化制合成气反应的影响．Ｘ光粉末衍射和活性考察结果表明，稀土氧化物使Ｎｉ／α－Ａｌ２Ｏ３催化剂的稳定性有显著提高．稀土氧化物与活性组份Ｎｉ之间的相互作用抑制了催化剂表面Ｎｉ晶粒的生长和迁移，由于这种作用也抑制了催化剂表面积炭的生成．在实验中还发现ＣｅＯ２容易进行Ｃｅ３＋Ｃｅ４＋氧化还原反应而对反应具有催化活性．
Partial oxidation of methane to synthesis gas over Ni/αAl2O3 promoted with rare earth oxides (La2O3, CeO2, Pr6O11 and Nd2O3) has been investigated by powder Xray diffraction and XPS. The catalytic activity,size of nickel crystallite, stability and carbon deposition of the catalysts were examined. Addition of rare earth oxide greatly improved the stability of Ni/αAl2O3 . The SMSI between the active species of Ni and rare earth oxides depresses the growth and the migration of Ni, as well as the carbon deposition on the surface of the catalyst.
出处
《应用化学》
CAS
CSCD
北大核心
1997年第4期70-73,共4页
Chinese Journal of Applied Chemistry
关键词
稀土氧化物
甲烷
合成气
镍
催化剂
部分氧化
rare earth oxide,Ni/αAl2O3,methane,catalytic oxidation,synthesis gas
