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不同硅铝比的Cu-ZSM-5/堇青石整体式催化剂的NO分解反应性能
NO Decomposition on Cu-ZSM-5/Cordierite Monolithic Catalyst Samples with Different Si/Al Ratios
【摘要】 考察了原位合成的不同硅铝比的Cu ZSM 5 /堇青石整体式催化剂上的NO分解反应 .结果表明 ,在 5 73~773K的温度范围内 ,硅铝比分别为 6 0 ,5 5和 40的催化剂在 72 3K下NO的转化率最高 ,而硅铝比小于 2 5的催化剂上的NO转化率很低 .低温有利于N2 O的生成 .整体式催化剂上的NO转化率低于单纯的分子筛催化剂Cu ZSM 5 ,但其催化转换频率高于后者
【Abstract】 The NO decomposition reaction on Cu ZSM 5/cordierite monolithic catalyst samples with different Si/Al ratios was carried out at 723 K and GHSV=10?000 h -1 with NO ( ω =2×10 -3 ) in He. The results indicated that a higher Si/Al ratio favors the conversion of NO. Little amount of N 2O was found in the products when the reaction temperature was over 623 K. The turnover frequency (TOF) for NO decomposition on the Cu ZSM 5/cordierite monolithic catalyst was higher than that on the pure Cu ZSM 5 zeolite catalyst.
【Key words】 copper; ZSM 5 zeolite; cordierite; monolithic catalyst; nitrogen oxide; decomposition;
- 【文献出处】 催化学报 ,Chinese Journal of Catalysis , 编辑部邮箱 ,2001年03期
- 【分类号】O643.3
- 【被引频次】51
- 【下载频次】490