Process for preparing sintering-free Y2O3-TiO2 catalyst honeycomb

Abstract

The invention provides a process for preparing a sintering-free Y2O3-TiO2 catalyst honeycomb, which is characterized by comprising the following steps of: (1) adding Y2O3 into submicron TiO2 which is prepared by a sulfuric acid method, has the average granularity of 0.35 micrometer and serves as a raw material in a molar ratio of 99:1 to form a Y2O3-TiO2 composite catalyst, and adding MgO and carboxymethylcellulose into the composite catalyst to form a honeycomb base stock, wherein a mass ratio of the Y2O3-TiO2 composite catalyst to the MgO to the carboxymethylcellulose is 20:10:1; (2) preparing MgCl2 into solution of which the baume degree is between 20 and 25, adding glycerol, and blending uniformly to form composite solution; and (3) adding the honeycomb base stock into the composite solution, mixing and kneading uniformly and fully to form plastic paste, extruding and curing at room temperature to obtain a sintering-free catalyst honeycomb. In the preparation process, submicron TiO2 powder is prepared by the sulfuric acid method, a high-activity catalyst is prepared from the submicron TiO2 powder and rare-earth metal yttrium, and the prepared honeycomb can remove SO2 and NOx in gas or flue gas effectively, so the energy is saved, and the preparation cost is reduced greatly.

Description

technical field [0001] The invention provides a sinter-free Y 2 o 3 -TiO 2 The preparation technology of catalyst honeycomb belongs to the technical field of inorganic new materials. Background technique [0002] The hazards of sulfur dioxide and nitrogen oxides in coal-fired flue gas are well known, and the development of simultaneous desulfurization (SO 2 ), denitrification (NO x ) New technologies and new equipment are imminent. where SO 2 The control methods include wet limestone-gypsum method, circulating fluidized bed method, seawater desulfurization and other technologies. For nitrogen oxides NO x Generally, a denitration device such as selective catalytic reduction or selective non-catalytic reduction is installed behind the desulfurization device, and selective catalytic reduction is the main method, so as to realize combined desulfurization and denitrification. This is a hierarchical governance approach. This method not only occupies a large area, but also...

AI Technical Summary

Problems solved by technology

This method not only occupies a large area, but also has high investment and operating costs, making it difficult to use in large areas