摘要
Ｃｕ－Ａｇ－Ｍｎ－Ｃｅ－Ｏ／γ－Ａｌ_２Ｏ_３催化剂对ＣＨ_３ＯＨ及ＣＯ深度氧化时各元素的相互作用王金安，许勇，汪仁（华东理工大学工业催化研究所，上海２００２３７）关键词Ｃｕ－Ａｇ－Ｍｎ－Ｃｅ－Ｏ／γ－Ａｌ_２Ｏ_３催化剂，深度氧化，甲醇，一氧化碳，相互?..
he deep oxidation of methanol and carbon monoxide in a microflow reactor over different oxide catalysts was studied. By means of EPR, XRD, XPS and SEM analyses, the metallic valency, activated phase and surface feature in various catalysts before and after reaction were characterized. The results showed that the Cu-Ag-Mn-Ce()/Y-Al2O3 is an optimum catalyst. Its T50 and T95 for CH3OH oxidation are 120 and 140℃,respectively. Among the different elements,copper can stop the accumulation of Mn2+;silver promotes the disproportionation reaction Mn2+←Mn3+→Mn4+; manganese has the effect upon the transformation Cu+→Cu2+;cerium has the capacity of reserving oxygen.
关键词
催化剂
深度氧化
甲醇
一氧化碳
Cu-Ag-Mn-Mn-O/γ-Al_2O_3 catalyst, deep oxidation,methanol, carbon monoxide, interaction
