摘要
活性炭广泛应用在工业废气的吸附、脱硝脱硫中,然而,传统活性炭微孔结构较少、孔隙分布不均匀、孔道内灰分较多造成阻塞等,脱硝脱硫效率不理想;在应用前常常需要通过改性手段处理活性炭来扩大其比表面积,提升孔隙率,改善表面官能团与掺杂原子的种类和数量,以此来提升吸附性能。综述了活性炭脱除废气中SO_(2)和NO_(x)的机理,研究了物理改性、化学改性对活性炭比表面积、孔结构、表面官能团等理化性质的影响,以及改性方法对活性炭吸附、脱除烧结废气中NO_(x)/SO_(2)效率的影响规律,展望了用于处理废气脱硝脱硫的活性炭改性趋势。
Activated carbon is widely used in the adsorption treatment of industrial sintering waste gas.However,the denitration and desulfurization efficiency is not ideal while the activated carbon manufactured by traditional process is applied,because of some defects such as less microporous structure,uneven pores distribution,and obstruction caused by ash in its channel etc.Therefore,before the application it is often needed to modify activated carbon by expanding specific surface area,the adsorption performance was improved by increasing the porosity and surface functional groups and doping atoms type and number.The mechanism of removal of SO_(2)and NO_(x)from waste gas by activated carbon was reviewed.The physical modification and chemical modification on the effect of the physical and chemical properties such as the specific surface area,pore structure and surface functional groups of activated carbon were studied.Their adsorption efficiency for SO_(2)and NO_(x)from sintering waste gas was reviewed.In the end the modification trend of activated carbon for denitrification and desulfurization of waste gas were prospected.
作者
李明原
廖亚龙
葛伟童
吴越
刘庆丰
LI Mingyuan;LIAO Yalong;GE Weitong;WU Yue;LIU Qingfeng(Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2023年第9期1-6,13,共7页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(21978122)
昆明理工大学分析测试基金项目(2022M20202202058)。
关键词
活性炭
废气治理
改性
脱硝脱硫
吸附
activated carbon
waste gas treatment
modification
denitrification and desulfurization
adsorption
