Co_(3)O_(4)/KIT-6催化剂催化分解N_(2)O反应研究  

Catalytic decomposition of N_(2)O over Co_(3)O_(4)/KIT-6 catalyst

作　　者：贾瑞 董文阳 张磊[1] 于海彪 江欣[1] 张会竹 李守君[1] 屈明焕 JIA Rui;DONG Wen-yang;ZHANG Lei;YU Hai-biao;JIANG Xin;ZHANG Hui-zhu;LI Shou-jun;QU Ming-huan(College of Pharmacy,Jiamusi University,Jiamusi 154002,China;College of Chemistry,Liaoning University,Shenyang 110036,China)

机构地区：[1]佳木斯大学药学院,黑龙江佳木斯154002 [2]辽宁大学化学院,辽宁沈阳110036

出　　处：《分子科学学报》2023年第2期154-164,共11页Journal of Molecular Science

基　　金：佳木斯大学青年创新人才培养支持计划项目(JMSUQP2020002)。

摘　　要：本文采用等体积浸渍法将活性组分Co_(3)O_(4)负载到具有大比表面积、独特三维交联介孔道的KIT-6分子筛上,制备一种负载型的Co_(3)O_(4)/KIT-6催化剂,并用于催化分解N_(2)O反应.研究发现,负载Co_(3)O_(4)后的催化剂不仅保持了KIT-6有序的介孔结构,同时增大了催化剂的有效比表面积,提高了活性组分Co_(3)O_(4)的利用率,其催化活性基本与纯Co_(3)O_(4)相持平.通过对不同负载量的Co/KIT-6催化剂的活性测试发现,该催化剂的活性随着Co负载量的增加而提升.通过对30%Co/KIT-6催化剂的稳定性测试及其在杂质气体存在条件下的活性测试,表明30%Co/KIT-6催化剂具有较好的催化稳定性和杂质气体抗性,适用于实际工业生产尾气中的N_(2)O处理.Nitrous oxide is not only a greenhouse gas with a high warming potential, but also a long-lasting consumer to ozone in the stratos-phere. It seriously damages the atmospheric environment and endanger human health. However, the annual emissions of N_(2)O is increa-sing, so it is of great significance to eliminate N_(2)O and reduce its pollution to the environment. At present, direct catalytic N_(2)O decomposition is regarded as the most promising method in the reported method for eliminating N_(2)O form the industrial tail gases. In recent years, researchers have been working hard to develop N_(2)O decomposition catalysts with low temperature, high efficiency, good tolerance to impurity gases, strong stability and low cost. Among them, metal oxide catalysts with Co_(3)O_(4) as active compounds have been attracted much attention because of their excellent catalytic performance. However, the small specific surface area, low utilization rate of active species and high production cost of simple metal oxide catalysts hinder the large-scale production and application of such catalysts. In this paper, the Co_(3)O_(4) was used as active compound and impregnated on the surface of three dimensional cross linked mesoporous KIT-6 molecular sieve to prepared the supported Co_(3)O_(4)/KIT-6 catalyst for the catalytic N_(2)O decomposition. The prepared catalysts were characterized by X-ray diffraction(XRD), nitrogen adsorption and desorption, transmission electron microscope(TEM), X-ray photoelectron spectroscopy(XPS) and Fourier transform infrared spectroscopy(FTIR), respectively. It was found that the catalyst loaded with Co_(3)O_(4) not only maintains the ordered mesoporous structure of KIT-6, but also increases the effective specific surface area of the catalyst and improves the utilization rate of the active component Co_(3)O_(4). In addition, XPS and FTIR results showed that the interaction between Co and KIT-6 weakened the Co—O bond, which can also improve the activity of the catalyst to some extent. Hence, the catalyti

关 键 词：N2O催化分解 KIT-6 CO3O4 负载型催化剂 

分 类 号：O643[理学—物理化学]