Hydrotalcite-Derived CuxMg3-xAlO Oxides for Catalytic Degradation of n-Butylamine with Low Concentration NO and Pollutant-Destruction Mechanism
Hydrotalcite-Derived CuxMg3-xAlO Oxides for Catalytic Degradation of n-Butylamine with Low Concentration NO and Pollutant-Destruction Mechanism
复制标题
水滑石衍生的 CuxMg3-xAl2O 氧化物催化降解低浓度 NO 的正丁胺及污染物破坏机制
DOI：
10.1021/acs.iecr.9b01570
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发表时间：
2019
影响因子：
4.2
通讯作者：
Hao Zhengping
中科院分区：
文献类型：
--
作者：
Xing Xin;Li Na;Cheng Jie;Sun Yonggang;Wang Gang;Zhang Zhongshen;Xu Hao;He Chi;Hao Zhengping
降解挥发性有机化合物(VOCs)的同时去除二次污染物NOx是一种很有前途的含氮VOCs(NVOCs)催化脱除方法。本文制备了一系列CuxMg3-XAlO混合氧化物，并将其用于正丁胺的选择性催化氧化。催化剂中的铜含量对催化剂的性能有显著影响。Cu0.4Mg2.6AlO具有最好的催化活性，在350℃时正丁胺的转化率为100%，氮气选择性为83%。用NH3-TPD、XPS、EPR、UV-Vis和H2-TPR对催化剂进行了表征。在此基础上，提出了正丁胺选择氧化的反应机理。此外，还利用Cu0.4Mg2.6AlO脱除选择性氧化过程中生成的NOx，进一步考察了NH3选择性催化还原NO的性能。将NVOCs的选择性催化氧化与NOx的选择性催化还原相结合，为协同脱除NVOCs和NOx提供了一种新的有效策略。
The degradation of volatile organic compounds (VOCs) with simultaneous removal of the secondary pollutant NOxis a promising solution for catalytic elimination of nitrogen-containing VOCs (NVOCs). Herein, a series of mixed CuxMg3–xAlO oxides were prepared and tested for selective catalytic oxidation ofn-butylamine. The Cu content of the catalysts significantly impacted their performance. Cu0.4Mg2.6AlO exhibited the best catalytic activity, with 100% conversion ofn-butylamine and 83% N2selectivity at 350 °C. The catalysts were characterized by NH3-TPD, XPS, EPR, UV–vis, and H2-TPR to reveal the structure–activity relationship. On the basis of DRIFTS results, the reaction mechanism of selective oxidation ofn-butylamine was proposed. Additionally, selective catalytic reduction of NO with NH3was further tested using Cu0.4Mg2.6AlO to remove NOx, which was generated after the selective oxidation process. By coupling selective catalytic oxidation of NVOCs with selective catalytic reduction of NOx, it provides a new effective strategy to synergistically remove NVOCs and NOx.