Surface chemical properties and pore structure of the activated coke and their effects on the denitrification activity of selective catalytic reduction
Wei Xie
Daming Liang
Lanting Li
Sijian Qu
Wu Tao
1.Beijing Research Institute of Coal Chemistry, China Coal Research Institute, No.5 Qingniangou Road, Chaoyang District, Beijing 100013, China;School of Chemistry and Environment Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China;Beijing Key Laboratory of Coal Based Carbon Materials, Beijing 100013, China;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control, Beijing 100013, China2.Beijing Research Institute of Coal Chemistry, China Coal Research Institute, No.5 Qingniangou Road, Chaoyang District, Beijing 100013, China;Beijing Key Laboratory of Coal Based Carbon Materials, Beijing 100013, China;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control, Beijing 100013, China
摘要：In order to study the mechanism of selective catalytic reduction of activated coke to remove NO in low-temperature flue gas and provide some theoretical basis for the development of related technologies.The pore sizedistribution and BET specific surface area of AC were obtain by data analyzing of N2 adsorption/desorption isotherm at -196 ℃ and carbon matrix and surface chemistry of virgin activated coke samples were characterized by acid-base titration and XPS.The process of selective catalytic reduction of activated coke (AC) samples with NH3 as reducing agent was studied in a fixed bed reactor at 150 ℃.The result shows that pore size distribution or BET specific surface of activated cokes have not correlation with denitrification activity for SCR.The NO reduction activities of the activated cokes are apparent to increase with their surface oxygen element content and total amount of acidic sites.Obviously there is good linear relationship between the NH3 adsorption capacity and activity for SCR with linear correlation coefficient 0.943.It has been presented that adsorption of NH3 on acidic functional groups in the edge of large polycyclic aromatic ring of activated coke is key rate controlling step in the SCR heterogeneous catalytic reaction.
机标关键词：selective catalytic reductionpore structurespecific surface areacorrelation coefficientpore size distributionlinear relationshipadsorption capacitycatalytic reaction
资助基金：The authors are grateful to the National Key Research and Development Program of China (2016YFC0204100)
论文发表日期：2019-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：8( 595-602 )
英文信息