催化氧化处理工业废气中高浓度甲醛

催化学报 , 2013, 34(10): 1945-1950. doi: 10.1016/S1872-2067(12)60696-2

催化氧化处理工业废气中高浓度甲醛

魏日出 ^1, , 陈洪林 ^2, , 张小明 ^3, , 索继栓 ^4,

1.中国科学院大学,北京100049;中国科学院成都有机化学研究所,四川成都610041

2.中国科学院成都有机化学研究所,四川成都610041

3.中国科学院成都有机化学研究所,四川成都610041

4.中国科学院成都有机化学研究所,四川成都610041

关键词：铂-二氧化铈/活性炭催化剂 , 甲醛废气 , 草甘膦生产 , 甲醛去除

Removal of high concentrations of formaldehyde in industrial exhaust by catalytic oxidation

Richu Wei ^1, , Honglin Chen ^2, , Xiaoming Zhang ^3, , Jishuan Suo ^4,

1.中国科学院大学,北京100049;中国科学院成都有机化学研究所,四川成都610041

2.中国科学院成都有机化学研究所,四川成都610041

3.中国科学院成都有机化学研究所,四川成都610041

4.中国科学院成都有机化学研究所,四川成都610041

Keywords： Platinum-ceria/activated carbon catalyst , Formaldehyde waste gas , Glyphosphate production , Formaldehyde removal

制备了用于温和条件下催化氧化去除工业废气中高浓度甲醛(HCHO)的1％Pt-4％CeO2/AC催化剂.将高浓度甲醛的催化氧化过程与双甘膦氧化制备草甘膦的反应过程集成在一起,使草甘膦合成过程中产生和排放出来的甲醛(100-300 mg/m3)在通过催化剂床层时被完全除去.系统研究了温度、空速和甲醛含量对甲醛去除率的影响.在气体空速(GHSV)低于20000 h-1时废气中几乎所有的甲醛都被氧化,处理后的废气中的甲醛含量低于0.1 mg/m3,甲醛的转化率为99.1％-100％.当GHSV为30000-50000 h-1,催化剂床层温度为12℃时,生产废气通过催化剂床层后的甲醛含量小于1.5 mg/m3,甲醛的转化率为97.56％-99.99％.1％Pt-4％CeO2/AC催化剂的中试试验结果表明,处理后最终尾气中甲醛含量小于10 mg/m3,有效地防止了甲醛对人们健康的危害,具有良好的产业化前景.

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