Composite loading nano-titania carrier and its prepn

Abstract

A loading type of nanometer titania composite carrier is constituted by loading 5-20 nm TiO2 in 10-40 wt% onto gamma-Al2O3. Titania sol is first prepared through sol-gel process and then dropped into pseudo-then diaspore pulp of different solution; and the product is finally processed through drying, calcination successively at 200, 300, 400 and 500 deg.c for 2 hr each. The present invention loads nanometer Tio2 onto macroporous Al2O3 to form the composite nanometer carrier. This can utilize the superority of nanometer TiO2 while overcoming the demerits. By means of the micro design, surface acidity regulation of loaded TiO2 and loading active component, the hydrorefining activity of catalyst may be raised effectively.

Description

technical field

[0001] The invention belongs to the preparation method of loaded nano titanium dioxide composite carrier. In γ-Al 2 o 3 Nano-TiO with controllable grain size loaded on it 2 , so that the supported TiO 2 The microscopic design of the composite carrier and the modulation of surface acidity make it possible to carry out catalytic reactions on the carrier with a controllable surface microstructure. By further loading active components on the composite carrier, such as CoMo, NiW, etc., the catalytic activity of the catalyst for hydrorefining can be effectively improved. Background technique:

[0002] As we all know, nanomaterials have very special structural effects such as volume effect, surface effect, quantum effect and macroscopic quantum tunneling effect. New functional materials made of nanomaterials have gradually revealed a huge role in promoting future science and technology and national economic construction. With the expan...

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