考察了负载型MoOx和Vox催化剂上二甲醚选择氧化制甲醛反应的性能. 结果表明,两类催化剂在低温(240～320 ℃)下都具有良好的催化性能,Vox催化剂比MoOx催化剂所需的反应温度低,300 ℃下在Vox/γ-Al2O3催化剂上二甲醚转化率可达20%,甲醛选择性可达70%. 载体对催化剂性能有较大的影响,对于Vox催化剂,使用酸性载体时二甲醚转化率和甲醛选择性更高. 催化剂的稳定性较好, 反应17 h后,Vox/γ-Al2O3催化剂上未检测到有积碳生成.
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