摘要
采用硅溶胶和微波法对堇青石蜂窝陶瓷载体进行表面改性,并在改性载体基础上制备了钒系催化剂。通过BET比表面积、TG-DTA和XRD等手段研究了焙烧温度对改性载体的比表面积、结构和催化剂反应活性的影响。实验表明,改性载体在经400℃焙烧后比表面积达到最大值72.74 m2/g,同时焙烧温度的变化并没有影响改性载体的结构,相应的使用经400℃焙烧的改性载体所制成的催化剂在最佳反应温度350℃时也拥有最大的NO转化率,说明了400℃是改性载体的最佳焙烧温度。
V2O5-WO3/SiO2 system supported on modified carrier with silica sol and microwave heating method was prepared, and the influence of calcination temperature on the specific surface area, structure of modified cordierite and the catalytic performance of catalyst were studied with BET, TG-DTA and XRD analysis. The results showed that the surface structure of modified cordierite was unchanged with the increased calcination temperature, and the specific surface area of modified cordierite reached 72.74 m^2/g when calcinated at 400℃. The highest reduction ratio of NO was obtained when V2O5-WO3/SiO2 system supported on the modified cordierite calcinated at 400℃ was used at the optimal reaction temperature of 350 ℃.
出处
《应用化工》
CAS
CSCD
2008年第6期606-608,612,共4页
Applied Chemical Industry
基金
黑龙江省博士后基金(LRB07-233)
关键词
硅溶胶
表面改性
焙烧温度
silica sol
surface modification
calcination temperature
