【摘要】 采用浸渍法制备了ＦｅＭｏ／ＨＺＳＭ５和ＦｅＭｏ／ＫＺＳＭ５分子筛催化剂，利用ＮＨ３ＴＰＤ和Ｏ２ＴＰＤ对催化剂的表面酸性和吸附Ｏ２物种进行了表征，考察了温度、Ｍｏ／Ｆｅ摩尔比、空气／甲醇摩尔比及ＷＨＳＶ对催化性能的影响．实验结果表明，在ＦｅＭｏ／ＫＺＳＭ５催化剂上，适宜的反应条件下，甲醇转化率接近１００％，甲醛选择性达到９０６％．同时还进行了９６ｈ的催化剂的稳定性实验更多还原

【Abstract】 The effects of reaction temperature, Mo/Fe molar ratio, air/methanol molar ratio and WHSV on methanol oxidation over FeMo/HZSM5 and FeMo/KZSM5 catalysts were investigated. The results indicate that the FeMo/KZSM5 has higher activity than the FeMo/HZSM5. Under optimum conditions the methanol conversion and the formaldehyde selectivity reach 100% and 906% respectively. The NH3TPD and O2TPD results show that the FeMo/HZSM5 catalyst has more sites of acidity and less sites of oxygen adsorption than the FeMo/KZSM5 catalyst. The experiments show that the site of strong acidity decreases the formaldehyde selectivity and the site of oxygen adsorption at higher temperature increases the formaldehyde selectivity. This might be the reasons that the selectivity of methanol oxidation to formaldehyde increased over FeMo/KZSM5 catalyst.更多还原