摘要
采用流变相法,以硝酸锰(MN)、自制锰盐(MX)、醋酸锰(MA)为前驱体溶液制备了Mn/TiO_2催化剂,通过拟合计算、XRD、BET、XPS、化学滴定等方法分析了催化剂的晶体结构、表观活化能、微观结构和锰离子价态,研究了不同前驱体溶液对催化剂低温脱硝活性的影响。结果表明:MX脱硝活性优于MN、MA,其中MX的表观活化能最低,表面Mn/Ti元素比高,比表面积较大,孔容较大,同时,MX的平均价态以及Mn4+的含量高,Mn^(2+)的含量低,这都使其表现出较好的脱硝活性。
Mn/TiO2 catalyst was prepared by rheological phase method with different precursor solution,manganese nitrate（ MN）,self-made manganese salt（ MX） and manganese acetate（ MA）. The crystal structure,apparent activation energy,microscopic structure and valence state of manganese ion of the catalysts were analyzed by fitting calculation,XRD,BET,XPS and chemical titration. By comparing the denitrification activity of the catalyst,the influence of different precursor solutions on the denitrification activity in low temperature was studied. The results reveal that the denitrification activity of MX is better than MN and MA,because of the lowest apparent activation energy,the highest ratio of Mn/Ti element in the surface,the largest specific surface area,and the largest pore volume. At the same time,the average valence state and the content of Mn^（4＋） of MX are highest,and the content of Mn^（2＋） is lowest,which are helpful to improve the catalytic activity of MX.
作者
陈阁
房晶瑞
马腾坤
汪澜
CHEN Ge;FANG Jing-rui;MA Teng-kun;WANG Lan(State Key Laboratory of Green Building Materials,China Building Materials Academy,Beijing 100024,China)
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2018年第7期2274-2279,共6页
Bulletin of the Chinese Ceramic Society
基金
国家重点研发计划(2017YFC0201701)
国家自然科学基金(51702308)
