摘要
采用浸渍法制备了不同Cu负载量的系列Cu/HZSM-5脱硝催化剂,通过XRD、H2-TPR、NH3-TPD、in situ DRIFTS等多种表征手段对催化剂进行了表征,并对其低温NH3-SCR脱硝性能进行测试。结果表明,Cu/HZSM-5催化剂在中低温均展现出较好脱硝效率,Cu负载量为20%的Cu/HZSM-5中低温脱硝效果最佳,288℃达到最大为96.89%,200~400℃温度范围脱硝效率均在80%以上。Cu物种高度分散在载体表面,未改变HZSM-5晶体结构。Cu/HZSM-520%催化剂具备丰富酸性位、优异的氧化还原性能,在NH3-SCR反应过程中只存在E-R机理,L酸性位在低温脱硝反应中发挥重要作用。
A series of Cu/HZSM-5 catalysts with different Cu content were prepared by impregnation method. X-ray diffraction (XRD), H2-temperature programmed reduction (H2-TPR), NH3-temperature programmed desorption (NH3-TPD) and in situ diffuse reflectance fourier transform infrared spectroscopy(DRIFTS) were used to characterized the catalyst, the performance of low-temperature NH3-SCR deNOx activity was also investigated. The results show that Cu/HZSM-5 has better denitrification efficiency at low and medium temperature, the sample with 20% Cu on the HZSM-5 exhibit the most superior NO reduction performance, 288℃ reaches the maximum of 96.89% and the efficiency more than 80% at the range of 200-400 ℃. Cu species are highly dispersed on the surface of carrier and the crystal structure of HZSM-5 has not been changed. The Cu/HZSM-5 20% catalyst has rich acid sites, excellent redox performance and only E-R mechanism existed during the NH3-SCR reaction process, Lewis acid sites plays an important role in the low-temperature denitrification reaction.
作者
王学涛
胡海鹏
张兴宇
苏晓昕
杨晓东
张乾蔚
史瑞华
梁彦正
WANG Xuetao;HU Haipeng;ZHANG Xingyu;SU Xiaoxin;YANG Xiaodong;ZHANG Qianwei;SHI Ruihua;LIANG Yanzheng(Henan University of Science and Technology,Luoyang 471003,Henan Province,China;National Engineering Lab of Coal-fired Pollution Emission Reduction(Shandong University),Jinan 250061,Shandong Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2018年第20期6029-6036,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(50806020)
河南省科技创新人才计划(杰出青年)(114100510010)
河南省自然科学基金项目(182300410256)~~
关键词
Cu/HZSM-5
NH3-SCR
低温
脱硝
原位漫反射傅里叶变换红外光谱
Cu/HZSM-5
NH3-selective catalytic reduction (NH3-SCR)
low-temperature
denitrification (DeNOx)
in situ diffuse reflectance fourier transform infrared spectroscopy (DRIFTS)
作者简介
王学涛(1976),男,教授,工学博士,硕士生导师,研究方向为清洁高效燃烧、废弃物能源化利用,wxt7682@163.com。;胡海鹏(1993),男,硕士研究生,研究方向为清洁高效燃烧、废弃物能源化利用,2803541886@qq.com。