摘要
针对常温、含高浓度O2的NO污染气体排放控制,典型的选择性催化还原(SCR)技术已不再适用。以碳基活性材料为催化剂的NO常温催化氧化技术得到了广泛关注,该技术在常温和高浓度O2条件下将NO氧化为NO2,并以硝酸或硝酸盐形式加以回收利用,因此具有环保和经济双重效益,应用前景广阔。本文简要综述了碳基活性材料常温催化氧化NO的研究进展,阐述了NO催化氧化机理,介绍了碳基活性材料的表面物化特性和反应条件(O2浓度、NO浓度、GHSV、反应温度、水蒸气和催化剂粒径等)对催化氧化NO的影响,以及活性炭、活性炭纤维、碳纳米纤维、炭干凝胶、金属负载碳基活性材料、炭化污泥等不同碳基活性材料的催化特性,总结并展望了未来碳基活性材料低温催化氧化NO的发展方向。
For controlling the emission of NO with ambient temperature and high O2 content,the typical selective catalytic reduction(SCR)technology is not suitable anymore.The catalytic oxidation of NO over carbon-based active materials at ambient temperature has gained much attention.Through this technology,NO can be oxidized to NO2 at ambient temperature and high O2 content,and recycled in the form of nitric acid or nitrate.Due to the great environmental and economic benefits,this technology has a broad application prospect.In this paper,research progress of carbon-based active materials for catalytic oxidation of NO at room temperature.The mechanism of NO catalytic oxidation wasdescribed.The effects of surface physicochemical characteristics and reaction conditions of carbon-based materials(O2 concentration,NO concentration,GHSV,reaction temperature,water vapor and catalyst particle size,etc.)on the catalytic oxidation of NO,as well as the catalytic characteristics of different carbon-based materials such as activated carbon,activated carbon fibers,carbon nanofibers,carbon xerogels,metalsupported carbon based active materials,and carbonized sludge were introduced.The future trend for catalytic oxidation of NO at low temperature was summarized and prospected.
作者
周易
邓文义
苏亚欣
ZHOU Yi;DENG Wenyi;SU Yaxin(School of Environmental Science and Engineering,Donghua University,Shanghai 201620)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2021年第2期859-869,共11页
Chemical Industry and Engineering Progress
基金
国家留学基金(201906635022)
上海市自然科学基金(19ZR1400700)
中央高校基本科研业务费专项资金(2232019D3-24)。
关键词
一氧化氮
二氧化氮
碳基活性材料
催化氧化
nitric oxide
nitrogen dioxide
carbon-based active materials
catalytic oxidation
