Ethanol-Water Near-Azeotropic Mixture Dehydration by Compound Starch-Based Adsorbent  

作　　者：孙津生 师明 王文平 

机构地区：[1]School of Chemical Engineering and Technology, Tianjin University [2]SINOPEC Engineering Incorporation

出　　处：《Transactions of Tianjin University》2015年第5期427-432,共6页天津大学学报（英文版）

基　　金：Supported by the Independent Innovation Foundation of Tianjin University(No.2010XY-0013)

摘　　要：Ethanol-water near-azeotropic mixture dehydration was investigated by formulated compound starchbased adsorbent(CSA), which consists of corn, sweet potato and foaming agent. The net retention time and separation factor of water over ethanol were measured by inverse gas chromatography(IGC). Results indicated that water has a longer net retention time than ethanol and that low temperature is beneficial to this dehydration process. Orthogonal test was conducted under different vapor feed flow rates, bed temperatures and bed heights, to obtain optimal fixed-bed dehydration condition. Dynamic saturated adsorbance was also studied. It was found that CSA has the same water adsorption capacity(0.15 g/g)as some commercial molecular sieves. Besides, this biosorptive dehydration process was found to be the most energy-efficient compared with other ethanol purification processes.Ethanol-water near-azeotropic mixture dehydration was investigated by formulated compound starch- based adsorbent （CSA）, which consists of corn, sweet potato and foaming agent. The net retention time and separa- tion factor of water over ethanol were measured by inverse gas chromatography （IGC）. Results indicated that water has a longer net retention time than ethanol and that low temperature is beneficial to this dehydration process. Or- thogonal test was conducted under different vapor feed flow rates, bed temperatures and bed heights, to obtain op- timal fixed-bed dehydration condition. Dynamic saturated adsorbance was also studied. It was found that CSA has the same water adsorption capacity （0.15 g/g） as some commercial molecular sieves. Besides, this biosorptive dehy- dration process was found to be the most energy-efficient compared with other ethanol purification processes.

关 键 词：starch-based adsorbent adsorption ethanol-water near-azeotropic mixture DEHYDRATION 

分 类 号：TQ424[化学工程]