摘要
以混合Ｃ４烷烃脱氢反应研究了Ｐｔ（Ｐｄ，Ｒｈ，Ｉｒ）－金属氧化物（Ｓｎ，Ｉｎ，Ｓｂ，Ｔｉ，Ｖ，Ｍｏ，Ｍｎ，Ｆｅ的氧化物）－载体的相互作用，发现Ｐｔ－Ｉｎ（Ｓｎ）／γ－Ａｌ２Ｏ３，Ｐｔ－Ｆｅ／ＳｉＯ２脱氢性能较好．并根据可变价金属氧化物的特性、金属氧化物含量存在最佳值及载体的性质对“夹心”结构模型进行了讨论．认为只有当Ｐｔ（Ｐｄ，Ｒｈ，Ｉｒ）和易于在γ－Ａｌ２Ｏ３载体上单层分布的、可变价的、不易被还原为金属的金属氧化物及载体之间形成特殊的“夹心”结构时，才能提高脱氢反应的选择性，优化催化剂的反应性能．
The interaction between Pt(Pd, Rh, Ir), metal oxide (Sn, In, Sb, Ti, V, Mo, Mn and Fe oxides were chosen for their properties of being easily dispersed on γ Al 2O 3 support in monolayer, variable valence and not being easily reduced to zero valence) and support ( γ Al 2O 3, SiO 2, active carbon and MgO) was studied by the dehydrogenation of mixed C 4 alkanes. The results show that Pt In(Sn)/ γ Al 2O 3, Pt Fe/SiO 2 catalysts have good dehydrogenation activity. The 'sandwich' structure model is discussed according to the properties and the content of metal oxides and the properties of supports. It is suggested that the catalytic activity for dehydrogenation is not enhanced until the 'sandwich' structure is formed in catalysts.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
1997年第2期97-101,共5页
基金
福特-中国研究与发展基金
关键词
铂
铁
金属氧化物
催化剂
载体
相互作用
Platinum, Iron, Metal oxide, Supported catalyst, Alumina, Silica, Butanes, Dehydrogenation
