Microwave heating honeycomb zeolite adsorbent and preparation method thereof

Abstract

The invention discloses a microwave heating honeycomb zeolite adsorbent and a preparation method thereof. The microwave heating honeycomb zeolite adsorbent comprises a zeolite honeycomb body. A framework, a microwave adsorption layer and a zeolite adsorption layer are arranged on the zeolite honeycomb body; the zeolite honeycomb body comprises a framework which is selected from cordierite and mullite. The microwave absorption layer which is 100-500 microns is coated to the outer layer of the framework. By adding B2O3 and ZnO as a doping material into SiC and being bonded by an aluminum oxide and silicon oxide adhesive, the microwave absorption layer is prepared from zinc oxide and silicon carbide. A zeolite adsorption layer which is 200-1000 microns thick is coated to the outer surface ofthe wave absorption layer. The zeolite adsorption layer is prepared from 80-90% by mass of a molecular sieve, 2-5% by mass of SiO2, 3-6% by mass of Al2O3 and 5-10% by mass of SiC. According to the microwave heating honeycomb zeolite adsorbent, the wave absorption layer in the zeolite honeycomb body gnerates heat to quickly increase the temperature of zeolite so as to desorb VOCs.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a microwave-heated honeycomb zeolite adsorbent. Background technique [0002] With the rapid development of the economy and the increasingly prominent environmental problems, atmospheric problems are becoming more and more serious. Among them, volatile organic compounds such as benzene series, organic chlorides, freon series, organic ketones, amines, alcohols, ethers, esters, acids and petroleum hydrocarbon compounds are the main killers of environmental pollution. [0003] There are two main ways to deal with VOCs: recycling and destruction. Among them, the recovery method mainly uses adsorption materials for adsorption, and then heats and desorbs to form high-concentration ℃ gas, and then recovers through condensation. [0004] The main adsorption materials for VOCs are activated carbon and zeolite. Due to the characteristics of flammability and low temperature resistan...

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Problems solved by technology

However, the current zeolite adsorption materials mainly use hot air to heat zeolite to remove VOCs, but this efficiency is low and energy consumption is large.

[0005] The current heating method uses hot air to transfer the heat in the air to the zeolite carrier through thermal diffusion to raise the temperature. This kind of heat transfer efficiency is low, and the temperature rise rate is slow. In order to speed up the temperature rise rate, it is necessary to increase the amount of hot air. The concentration ratio is lower

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