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采用颗粒活性炭对水中低浓度的乙醇进行吸附,饱和后在氮气氛围中用微波辐照解吸,以实现乙醇的回收和活性炭的再生。载乙醇活性炭在氮气氛围中微波解吸的研究表明,随微波功率的增高,乙醇出口浓度的峰值也增大,且越早出现;在320 W微波功率下,80 s左右即出现出口浓度的最高峰值,当微波功率不低于320 W时,120 s左右即可解吸完全;微波功率对乙醇出口浓度曲线影响较大,是影响微波解吸分离效果的重要因素;质量分数4%～8%的乙醇水溶液经3次活性炭吸附-氮气氛围中微波解吸循环后,乙醇浓度可提纯至94%～95%以上。
Granular activated carbon is used to adsorb low concentration of ethanol in water, and then desorbed by microwave irradiation in a nitrogen atmosphere after being saturated to achieve the recovery of ethanol and the regeneration of activated carbon. The study on microwave desorption of activated carbon from activated carbon under nitrogen atmosphere showed that with the increase of microwave power, the peak value of ethanol outlet concentration also increased and appeared earlier. At the power of 320 W, the peak value of outlet concentration appeared at about 80 s , When the microwave power is not lower than 320 W, it can be completely desorbed for about 120 s; the microwave power has a great influence on the ethanol outlet concentration curve, which is an important factor affecting the desorption and separation of microwaves; the ethanol solution with a mass fraction of 4% to 8% After 3 times activated carbon adsorption - nitrogen desorption cycle in microwave, the ethanol concentration can be purified to 94% to 95%.