Effect of Ti addition on complete oxidation of several VOCs over Pt/MCF catalyst(Pt/MCF催化剂上Ti的添加对典型VOCs完全氧化反应的影响)

Abstract

The catalysts PtxTi/MCF and Pt/yTi-MCF were obtained by adding Ti element to mesocellular silica foam (MCF) support in two different ways. The catalytic activities of these catalysts for the complete oxidation of benzene, n-hexane and ethyl acetate were studied. The effects of different catalyst preparation methods, Ti addition amount and calcination temperature were investigated in detail. In addition, the structure and physicochemical properties of some of the support and catalyst were characterized by nitrogen isothermal adsorption-desorption, Raman spectrum analysis, small and wide angle XRD. The results show that, Pt8Ti/MCF has good catalytic activity and stability for the complete oxidation of benzene, n-hexane, and especially ethyl acetate. It was prepared simply by impregnating the mixture solution of platinum acetylacetone and titanium acetylacetone and then calcination, which exhibits a good application prospect in future.(在介孔二氧化硅泡沫（mesocellular silica foam,MCF）载体中用2种不同的方式添加钛（Ti）元素，分别得到PtxTi/MCF和Pt/yTi-MCF系列催化剂，研究了催化剂对于苯、正己烷和乙酸乙酯完全氧化反应的催化活性，详细考察了催化剂的制备方法，以及Ti的添加量、焙烧温度对催化活性的影响。另外，用氮气等温吸脱附曲线、拉曼（Raman）光谱、小角和广角X射线衍射（XRD）分析等，表征部分载体及催化剂的结构及其物理化学性质。结果表明，将乙酰丙酮铂和乙酰丙酮钛混合，经浸渍、焙烧制备的Pt8Ti/MCF催化剂，对苯、正己烷，尤其是乙酸乙酯的完全氧化反应具有较好的催化活性和稳定性，且制备方法简单，有较好的应用前景。)

Keywords

• tio2(tio2)
• mesocellular silica foam (mcf)(介孔二氧化硅泡沫)
• nano pt(纳米pt)
• catalytic incineration(催化完全氧化)
• vocs(挥发性有机物)