燃料化学学报2013，Vol.41Issue(3)：361-367,7.
铁铈复合氧化物催化剂SCR脱硝的改性研究
Study on the modification of iron-cerium mixed oxide catalyst for selective catalytic reduction of NO
摘要
Abstract
A series of iron-cerium mixed oxide catalysts modified titanium, zirconium, tungsten and molybdenum were prepared by co-precipitation. The selective catalytic reduction of NOx with NH3(NH3-SCR) activity of the catalysts were carried out in a fixed-bed quartz tube reactor. The research results indicated that the addition of tungsten and molybdenum could increase the high-temperature NH3-SCR activity of the iron-cerium mixed oxide catalysts, but decreased its low-temperature NH3-SCR activity. Titanium could improve the NH3-SCR activity of the iron-cerium mixed oxide catalyst within the range of reaction temperature, especially at low-temperature. Titanium was the most suitable assistant. When increasing the molar fraction of titanium from 0.10 to 0.40, the low-temperature NH3-SCR activity of iron-cerium-titanium mixed oxide catalysts firstly increased and then decreased while the high-temperature activity gradually increased to 100% , and the optimum molar fraction of titanium was 0.15. The results of X-ray diffraction(XRD) and N2 adsorption isotherms showed that the addition of titanium could optimize the pore structure of iron-cerium mixed oxide catalyst, and increased the BET surface and the pore volume of the iron-cerium mixed oxide catalyst, meanwhile refined its pore size. At the some cases, titanium could react with iron oxide and cerium oxide within the iron-cerium mixed oxide catalyst to form the solid solution. Therefore, the addition of titanium could enhance the NH3-SCR activity of iron-cerium mixed oxide catalyst. Under the condition of the test, more than 90% of NOx conversion could be achieved over Fe0.8Ce0.05Ti0.15OZ catalyst at the temperature range of 150~400℃.关键词
铁铈复合氧化物催化剂/选择性催化还原脱硝/NOx/钛/改性Key words
iron-cerium mixed oxide catalyst/ selective catalytic reduction ( SCR) of NO/ NOx/ titanium/modification分类
能源科技引用本文复制引用
熊志波,路春美..铁铈复合氧化物催化剂SCR脱硝的改性研究[J].燃料化学学报,2013,41(3):361-367,7.基金项目
国家自然科学基金(51276101) （51276101）
山东省自然科学基金(ZR2012EEM013) （ZR2012EEM013）
