Abstract
Granular activated carbon is used in adsorption of low concentration ethanol in water, and the saturated carbon is desorbed by microwave irradiation under N2 condition for recovery of the ethanol and regeneration of the activated carbon. Through the study on microwave desorption of ethanol-loaded activated carbon under N2 condition, the following conclusions can be drawn. The highest value of the ethanol concentration appears quicker and higher when the microwave power is stronger. For example, the highest value appears before 80s when the microwave power is 320W; the ethanol-loaded activated carbon can be desorbed nearly completely after 120s when the microwave power is not weaker than 320W; the microwave power has an important effect on the outlet concentration curve of ethanol, and it is an important factor that affects the results of microwave desorption; After three processes of activated carbon adsorption and microwave desorption under N2 condition, the concentration of ethanol can come up to over than 94%～95% from 4%～8%. This paper sets forth the process and principle for microwave desorption of ethanol-loaded activated carbon under N2 condition.
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