摘要
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 was 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, we can draw the following conclusions. The highest value of the ethanol concentration appears quicker and higher when the microwave power was stronger. For example, the highest value appears before 80 s when the microwave power was 320 W; the ethanol-loaded activated carbon can be desorbed nearly completely after 120 S when the microwave power is not weaker than 320 W; the microwave power has an important effect on the outlet concentration curve of ethanol, and it was 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%.
出处
《水处理技术》
CAS
CSCD
北大核心
2011年第4期42-44,共3页
Technology of Water Treatment
基金
云南省教育厅科学研究基金项目资助(5Y0528D)
关键词
微波解吸
氮气氛围
活性炭
吸附
乙醇
microwave desorption
N2 condition
activated carbon
adsorption
ethanol
