净化丙烯腈废气催化剂的研究

STUDIES ON DIFFERENT CATALYSTS USED FOR PURIFICATION OF ACRYLONITRILE

研究了贵金属Ｐｄ，Ｐｔ，非贵金属Ｃｕ－Ｍｎ氧化物及沸石等催化剂对含ＣＮ有机物丙烯腈的氧化活性．结果表明，以Ｃｕ－Ｍｎ作活性组分、ＺｒＯ２作助活性组分的催化剂对丙烯腈有较高的氧化活性、较强的控ＮＯｘ能力、较低的起燃温度、较宽的浓度处理范围和较大的空速处理能力．３００ｈ稳定性试验后催化剂活性仍在９９％以上．Ｏ２－ＴＰＤ及扫描电镜表征结果很好地支持了反应结果．

The oxidative activity for acrylonitrile of noble metals (Pt, Pd), non noble metal (Mn Cu) oxides supported on cordierite ceramics and zeolites was investigated. The results show that the catalysts with Cu Mn oxides as active components and ZrO 2 as promoter have higher oxidative activity, stronger ability to control NO x formation, lower light up temperature, larger treatable range of acrylonitrile concentration and space velocity. After reaction for 300 h, the activity of the catalyst is still above 99%. The investigations of O 2 TPD and electron micrography of catalysts support the reaction results well.