碳基催化剂表面含氧官能团对NO催化还原反应的影响研究  

A Study on the Effect of Surface Functional Oxygen Groups of Carbon Based Catalyst on the Catalytic Reduction of Nitrogen Monoxide

作　　者：李晓曼 Li Xiaoman(China International Intellectech(Shanghai)Co.,Ltd.,Shanghai 200233)

机构地区：[1]中智上海经济技术合作公司

出　　处：《上海环境科学》2018年第3期111-115,共5页Shanghai Environmental Sciences

摘　　要：以富含表面含氧官能团的氧化石墨烯(GO)作为研究对象,考察GO及GO负载铁催化剂(Fe@GO)在NO-SCR中的主要结构单元及其在不同反应温度下的作用机理,发现在100℃反应条件下,对NO分解起主要作用的是羧酸基团,GO对NO的去除效率大于Fe@GO;而300℃反应条件下,GO表面大量羧酸基团受热分解,无法起到去除NO的作用,而Fe@GO中酸酐基团和C-Fe-O基团在较高的反应温度下开始发挥作用,使催化效率显著增加,故Fe@GO对NO的去除效率大于GO。Graphene oxide(GO)with abundant surface oxygen functional groups was used to show the main structural unit in NO-SCR involving GO and GO supported iron catalyst(Fe@GO).The research showed that the removal rate of nitrogen monoxide(NO)by GO was greater than by Fe@GO at temperature of 100°C,but it turned to be lower at 300°C.This was owing to the fact that carboxylic acid groups on GO resulted in a higher catalytic effect at 100°C whilst were decomposed by heating at 300°C.At higher reaction temperature,NO removal was attributed to anhydride groups and the unique structure of C-Fe-O on Fe@GO so as to cause the catalytic effect higher than GO.

关 键 词：表面含氧官能团 氧化石墨烯 选择性催化还原法 程序升温反应 

分 类 号：X701.1[环境科学与工程—环境工程]