改性瓦斯灰干法脱除NO的实验研究  

Experimental study on removal of NO by modified gas ash drying method

作　　者：庞崇靖 张运瀚 冯嘉予 夏福婷 马林转 贾丽娟 PANG Chong-jing;ZHANG Yun-han;FENG Jia-yu;XIA Fu-ting;MA Lin-zhuan;JIA Li-juan(Yunnan Provincial Universities Key Laboratory of Clean Transformation of Resources in Ethnic Minority Areas,Key Laboratory of Comprehensive Utilization of Mineral Resources in Ethnic Minority Areas,Environmental Functional Materials Key Laboratory of Yunnan Education Department,School of Chemistry and Environment,Yunnan Minzu University,Kunming 650504,China)

机构地区：[1]云南民族大学化学与环境学院,云南省高校民族地区资源清洁转化重点实验室,民族地区矿产资源综合利用重点实验室,云南省教育厅环境功能材料重点实验室,云南昆明650504

出　　处：《现代化工》2024年第4期112-115,121,共5页Modern Chemical Industry

基　　金：国家自然科学基金项目(51968075)。

摘　　要：用不同碱改性固体废物瓦斯灰制备出一种能够脱除烟气中NO的催化剂。考察了浸渍浓度、固液比、超声时间等制备条件对瓦斯灰脱硝性能的影响,并对材料进行了XRF、XRD、SEM、EDS-Mapping、FT-IR表征。结果表明,利用KOH改性的瓦斯灰脱硝性能最佳,在KOH浓度为2 mol/L、固液比为1∶2、超声时间为40 min的最佳制备条件下脱硝率约达100%。改性后,K成功负载在材料表面,瓦斯灰微观结构发生了变化,生成的新物质为NO的去除提供了更多活性位点。A catalyst for removing NO from flue gas is prepared by using different alkali⁃modified gas ash,a kind of solid waste,to achieve the goal of“treating wastes with wastes”.The influences of the preparation conditions such as impregnation concentration,solid⁃to⁃liquid ratio and sonication time on the denitrification performance of the gas ash⁃derived are investigated,and the catalyst is characterized by means of XRF,XRD,SEM,EDS⁃Mapping and FT⁃IR.The results show that the gas ash modified with KOH shows the best denitrification performance,which can deliver a denitrification rate of about 100%under the best preparation conditions that KOH concentration is 2 mol·L-1,solid⁃liquid ratio is 1∶2,and sonication time is 40 min.After the modification,K has successfully been loaded on the material surface,the microstructure of gas ash has been changed,and the new substances generated provide more active sites for NO removal.

关 键 词：干法 瓦斯灰 NO 资源化利用 

分 类 号：X701[环境科学与工程—环境工程]