摘要
采用溶胶-凝胶法合成了钼铁催化剂,通过该催化剂,利用空气中的O2进行对二甲苯选择性氧化,制备出对苯二甲醛。催化剂的活性评价结果表明,在n(Mo)∶n(Fe)∶n(Co)=2.4∶1∶0.02和焙烧温度500℃条件下,催化剂的活性最高;反应温度为500℃和空速5 500 h-1时,对苯二甲醛的收率达到59.2%。FT-IR和XRD结果证实,催化剂的活性组分为Fe2(MoO4)3与少量的MoO3,二者具有协同作用。
Mo-Fe catalysts were prepared by sol-gel method. The effects of atomic ratio in the catalysts, calcination temperature and GHSV on the behaviors of the catalysts for selective oxidation of p-xylene to terephthaldehyde（TPAL） were investigated. The activity test results showed that the optimum condition was as follows ： n （Mo） ： n （Fe） ： n （Co） = 2.4：1： 0.02, calcination temperature 500 ℃, GHSV 5500 h ^- 1. Terephthaldehyde yield of 59.2% was attained under the optimal condition. XRD and FT-IR results showed that the active components were Fe2 （ MoO4 ） 3 and MOO3, which had synergistic effects during oxidation of p-xylene.
出处
《工业催化》
CAS
2008年第10期135-138,共4页
Industrial Catalysis
基金
国家自然科学基金资助课题(20776031)
关键词
催化化学
选择性氧化
对二甲苯
对苯二甲醛
钼铁催化剂
catalytic chemistry
selective oxidation
p-xylene
terephthaldehyde
molybdenum-cobalt catalyst
