以椰壳碳为载体的碳化钼催化剂在NO_(2)转化制NO反应中的应用  

Application of molybdenum carbide catalyst carried by coconut shell carbon in the conversion of NO_(2)to NO

作　　者：穆仕芳 王艳[1] 王洪亮 孟士航 翁育靖 孙琦 张玉龙 MU Shi-fang;WANG Yan;WANG Hong-liang;MENG Shi-hang;WENG Yu-jing;SUN Qi;ZHANG Yu-long(College of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China;Henan Key Laboratory of Coal Green Conversion,Jiaozuo 454003,China;College of Chemistry and Chemical Engineering,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]河南省煤炭绿色转化重点实验室,河南焦作454003 [3]河南理工大学化工学院,河南焦作454003

出　　处：《高校化学工程学报》2023年第2期326-332,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：河南理工大学博士基金(B2019-54);河南省煤炭绿色转化重点实验室开放课题(CGCF201910);河南省煤炭绿色转化杰出外籍科学家工作室(GZS2020012)。

摘　　要：为改善活性炭(AC)负载Mo_(2)C基催化剂还原NO_(2)制NO的反应性能,考察硝酸、氨水和双氧水处理后的活性炭对Mo_(2)C/AC结构及反应性能的影响。采用N_(2)物理吸附-脱附、扫描电子显微镜、X射线衍射等对催化剂进行表征。结果表明:催化剂含氧官能团丰富,Mo_(2)C均匀分散,比表面积和孔容比AC0(未预处理AC)小。Mo_(2)C/AC2比表面积和微孔孔容最大,含氧官能团少,有利于Mo_(2)C分散、NO_(2)吸附和还原。3种催化剂在100~400℃转化率随着温度的升高先上升后下降,在250℃时转化率大小关系为:Mo_(2)C/AC2(80.8%)>Mo_(2)C/AC3(75.9%)>Mo_(2)C/AC1(55.2%)。The NO_(2)reduction performance catalyzed by Mo_(2)C-based catalyst supported on activated carbon(AC)was carried out,and the effects of activated carbon treated with nitric acid,ammonia water and hydrogen peroxide on the structure and reactivity of Mo_(2)C/AC were investigated.The catalysts were characterized by N_(2) physisorption-desorption,scanning electron microscopy(SEM),X-ray diffraction(XRD)and other characterization methods.The results showed that catalysts were rich in oxygen-containing functional groups,the Mo_(2)C was uniformly dispersed,the specific surface area and pore volume were smaller than AC0(AC without pretreat),Mo_(2)C/AC2 had the largest specific surface area and micropore volume,and less oxygen-containing functional groups,which was beneficial to Mo_(2)C dispersion,NO_(2)adsorption and reduction.The conversion rates of the three catalysts at 100~400℃increased first and then decreased with the increase of temperature.The conversion rate at 250℃was:Mo_(2)C/AC2(80.8%)>Mo_(2)C/AC3(75.9%)>Mo_(2)C/AC1(55.2%).

关 键 词：活性炭预处理 碳化钼 催化剂 NO_(2)转化制NO 

分 类 号：X830[环境科学与工程—环境工程]