Novel regeneration method for VOC (volatile organic compound) adsorbent

Abstract

The invention provides a novel regeneration method for a VOC (volatile organic compound) adsorbent, and belongs to the new technical field of control of atmospheric pollutants. Industrial waste gas containing NOx, SOx and CO is taken as regeneration gas, and regeneration of the adsorbent with saturated adsorption of VOCs is completed at lower temperature. According to the reaction mechanism, the VOCs are adsorbed on the adsorbent, content of functional groups on the adsorbent surface is increased by 50%-200%, the reduction effect of the adsorbent is enhanced, then the regeneration gas is introduced, a reaction is performed to enable the VOCs to be mineralized into CO2, so that the purpose of adsorbent regeneration is achieved, and the regeneration gas can be recycled for adsorbent regeneration. Specific surface area loss amount of the adsorbent regenerated with the method is smaller than 0.05%; average pore size reduction amount is smaller than 0.3%; mass loss amount of the adsorbent is smaller than 0.1%, and the discharged industrial waste gas meets the green emission standards, and the process is a novel, simple and efficient method for regenerating the VOC adsorbent.

Description

technical field [0001] The invention relates to a novel regeneration method for a volatile organic pollutant (VOCs) adsorbent, which belongs to the field of new technologies for controlling air pollutants. Background technique [0002] Volatile organic compounds (VOCs) are a general term for a class of organic compounds with a melting point lower than room temperature and a boiling point lower than 50-260°C under standard atmospheric pressure, mainly including alkanes, hydrocarbons, esters, alcohols, benzene series, etc. . It is one of the important precursors of photochemical smog and PM2.5. In recent years, smog incidents have occurred frequently, which has made VOCs monitoring and governance a national priority. In response to the huge demand for VOCs treatment, various technologies have been born, including adsorption, condensation, biological, plasma and combustion. However, as an industrial source that accounts for 55.5% of man-made VOCs emission sources, it has the...

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Problems solved by technology

[0005] Therefore, there is an urgent need to find a new technology to solve the multiple contradictions in the current concentration-combustion process, including the low light-off temperature of noble metals-expensive contradictions, the high light-off temperature-cheap price contradictions of transition metal catalysts, and the reduction in the use of catalysts. Reaction temperature-increased operating cost contradiction, activated carbon adsorbent is easy to be scrapped-high waste treatment cost contradiction

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