摘要
主要用第四周期金属元素的氧化物与Ａｌ２Ｏ３的复合氧化物催化剂上甲烷氧化的结果证实了催化剂设计中的预测：（１）催化剂首先应能解离活化甲烷，（２）催化剂要能较快地活化Ｏ２分子．只有同时满足这两个条件，催化剂才可能有较好的甲烷部分氧化活性．第四周期元素中只有镍具有这样的性质．Ｃｕ，Ｍｎ，Ｃｒ，Ｌａ，Ｃａ，Ｚｎ等氧化物的添加可明显提高Ｎｉ－Ａｌ２Ｏ３催化剂的甲烷部分氧化性能，其中Ｃｕ的助催化性能最好．催化剂ＮｉＯ－ＣｕＯ－Ａｌ２Ｏ３，ＮｉＯ－ＭｎＯ－Ａｌ２Ｏ３，ＮｉＯ－Ｃｒ２Ｏ３－Ａｌ２Ｏ３的反应活性和选择性顺序，与金属Ｃｕ，Ｍｎ。
Methane partial oxidation (MPO) over complex oxide catalysts containing Al 2O 3 and metal (the fourth period elements) oxides has been investigated. The results verify the prophecy of catalyst design: first,the catalyst should activate methane with the mode of dissociation; second,the catalyst could activate oxygen swiftly. Only at this time, the catalyst may have good activity for MPO. Promoters, such as Ca, La, Cr, Mn, Cu, Zn, can obviously improve the activty of NiO Al 2O 3 catalyst for MPO. Among these promoters, Cu has the best ability of promoting catalysis. The catalytic activities of Ni Cu Al, Ni Mn Al and Ni Cr Al catalysts are in accord with the desorption ability of CO and H 2 over metal of Cu, Mn, Cr.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
1996年第3期207-211,共5页
关键词
甲烷
部分氧化
合成气
氧化镍
催化剂
Methane, Partial oxidation, Syngas, Nickel oxide, Metallic oxide catalyst
