【摘要】：利用超聲浸漬法制備硒摻雜前后的釩催化劑V/SiO_2和Se-V/SiO_2,采用Raman、XRD和TG/DSC對催化劑進行分析表征,并測定了兩組催化劑對SO_2氧化制SO3性能的影響。結(jié)果表明,與V/SiO_2相比,硒摻雜后釩催化劑Se-V/SiO_2的活性組分顆粒尺寸減小,分散度增大,提供的活性位點增多,且降低了催化劑組分的熔融相變溫度,這些作用有利于該催化劑在較低溫度下反應(yīng)物分子的吸附與活化,提高其催化活性。使得在480℃以下,催化劑Se-V/SiO_2催化SO_2氧化的轉(zhuǎn)化率明顯高于V/SiO_2。
[Abstract]:The vanadium catalysts V/SiO_2 and Se-V / SiO-2 were prepared by ultrasonic impregnation method. The catalysts were characterized by Raman V/SiO_2 and TG/DSC, and the effects of the two groups of catalysts on the oxidation of SO_2 to SO3 were measured. The results show that, compared with V/SiO_2, the active component particle size of Se-V/SiO_2 decreases, the dispersity increases, the active sites are increased, and the melting phase transition temperature of the catalyst component decreases after se doping. These effects are beneficial to the adsorption and activation of the reactants at lower temperature and improve their catalytic activity. Under 480 鈩，

本文編號：2188458