Mesoporous Silica Load Of Ru-based Catalytic Materials Preparation And Catalytic Hydrogenation

Catalyst is an important of material which is able to improve the rate of chemical reaction and doesn't minimize the weight of itself in the course of reaction. Nano-metal catalyst is one of the most important heterogeneous catalysts. Mainly used for hydrogenation, dehydrogenation, and oxidation. Transition metals are effective hydrogenation and dehydrogenation catalysts, precious metals can be divided into departments (mainly palladium and platinum, ruthenium, rhodium, etc) and the department of general metals (iron, cobalt, nickel, copper, zinc, etc.). Amorphous alloy is one type of Nano-metal catalyst, a kind of material with short-range ordering while long-range disordering structure. Its unique structural character results in the excellent catalytic properties, such as the high yield and selectivity, the high resistance to the sulfur poison. But so far, the amorphous alloy catalysts also have some shortcomings, for example small surface area, low dispersion of the metal and low active site. In order to improve the shortcomings we choose the mesoporous materials as the amorphous alloy support because of its high surface area, proper pore size, and ordered pore structure. These advantages have cataract more and more researchers. Lay the foundation of the above advantage, in the first part of my paper, wechoose a novel mesoporous silica nanosphere (SNs) with straight channels as host matrix. Compare with the traditional MCM-41 mesporous material. The amorphous Ru-B@SNs establishes a high catalytic activity in the hydrogenation of glucose.The second part of the thesis we choose the novel mesoporous silica nanosphere(SNs) functionalized with different groups(CH₃, NH₂) synthesis the functionalized supported amorphous alloy catalyst and apply to the hydrogenation of glucose to sorbitol, such catalyst showed a higher activity than the non functionalized catalyst.The development of novel routes for the transformation of renewable biomass or biomass-derived resources into useful chemicals is of great importance for stablishing sustainable chemical processes.So the last part of the thesis focuses on the studies of hydrogenation of cellobiose over acid-functionalized SBA-15 support the ruthenium nanoparticles catalyst...