摘要
以马鞍山钢铁集团南山矿铁矿石尾矿为主要原料制备无载体催化剂,对其进行了XRF,BET和XRD表征,并于电加热石英玻璃管固定床中实验研究了催化剂对NH3还原NO的催化活性.结果表明,用铁尾矿所制催化剂在反应温度500-600℃下具有良好的催化活性,600℃时催化还原率达97.5%,且粒径越小催化还原率越高;氧含量对催化还原率有较大影响,350℃时增加氧含量可提高催化还原率,500℃时增加氧含量会降低催化还原率;氧化铁作为主要活性组分,在催化剂中含量越高催化还原率越高,但氧化铁高温时易烧结,会降低催化还原率.
Unsupported catalyst was prepared by iron ore tailing selected from Nanshan mine of Ma＇anshan iron ＆ steel company limited The catalysts were characterized by XRF, BET and XRD techniques. Experiments of catalytic reduction of NO over catalyst with NH3 were carried out in a quartz glass fixed-bed reactor. The results showed that the catalyst prepared by iron ore tailing presents a good catalytic activity for NO reduction at 500-600 ℃. The catalytic reduction rate can reach to 97.5% at 600 ℃. Moreover, the smaller the particle size, the higher the catalytic reduction rate. Increasing oxygen content can increase catalytic reduction rate of NO at 350℃. However, high oxygen content can decrease catalytic reduction rate of NO at 500 ℃. The higher the iron oxide content, the higher the catalytic reduction rate. But at high temperature, sintering of iron oxide can decrease the catalytic reduction rate.
作者
韩云龙
李迎根
郑昭
张浩
钱付平
胡永梅
Yunlong HAN;Ylnggen LI;Zhao ZHENG;Hao ZHANG;Fuping QIAN;Yongmei HU(School of Civil Engineering and Architecture, Anhui University of Technology, Ma＇anshan, Anhui 243032, China;Key Lab of Energy Thermal Conversion and Control, Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China)
出处
《过程工程学报》
CAS
CSCD
北大核心
2018年第2期350-355,共6页
The Chinese Journal of Process Engineering
