Porous light honeycomb zeolite and preparation method thereof

Abstract

The embodiment of the invention provides a preparation method of porous light honeycomb zeolite. The method comprises the following steps: quantitative weighing: weighing all raw materials according to a design proportion; mixing the main materials: adding the weighed main materials into a double-helix mixer, and mixing for 2-3 hours; pug mixing: uniformly mixing the mixed pug by using a pug mill; aging the pug: sealing and aging the mulled pug, and uniformly dispersing moisture to eliminate the internal stress of the pug; extrusion molding: carrying out extrusion molding by using a honeycomb extruder, and cutting according to a pre-designed size to obtain a sample; and drying and sintering: placing the sample for 4-5 days under a closed windless condition, drying the sample in a microwave oven, controlling the water content to be below 3%, and sintering the sample in a furnace. According to the invention, the pore number of the honeycomb zeolite can be increased, and the contact area with organic waste gas is increased, so that the adsorption efficiency and adsorption capacity of the honeycomb zeolite are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of honeycomb zeolite, and in particular relates to a porous lightweight honeycomb zeolite and a preparation method thereof. Background technique [0002] With the rapid development of my country's industrialization and urbanization and the continuous growth of energy consumption, PM2.5 and O 3 The characteristic regional compound air pollution is becoming more and more prominent, and the frequency of heavy air pollution in the region is increasing at the same time, which seriously restricts the sustainable development of social economy and threatens the health of the people. In order to fundamentally solve PM2.5, O 3 To effectively improve the quality of the atmospheric environment, the country should actively promote the pollution prevention and control of its key precursors, VOCs. However, at present, the foundation of VOCs pollution prevention and control in my country is relatively weak, and there are ...

AI Technical Summary

Problems solved by technology

However, when the honeycomb zeolite is formed, in order to maintain a high mechanical strength, the inner wall is usually thicker, which makes the zeolite molecular sieve body density too high, and if the wall thickness is reduced, the strength will decrease, so how to maintain the high strength of the honeycomb zeolite and lower Density can effectively reduce production costs, increase the number of pores of honeycomb zeolite, increase the contact area with organic waste gas, and effectively improve the adsorption efficiency and adsorption capacity of zeolite, but increasing the number of pores of honeycomb zeolite causes many problems in the molding of honeycomb zeolite , such as poor shaping effect, increased density of honeycomb zeolite, etc.