1-Butanol Separation from Aqueous Acetone-Butanol-Ethanol (ABE) Solutions by Freeze Concentration

被引:3
|
作者
Osmanbegovic, Nahla [1 ]
Chandgude, Vijaya [2 ]
Bankar, Sandip [2 ]
Louhi-Kultanen, Marjatta [1 ]
机构
[1] Aalto Univ, Sch Chem Engn, Dept Chem & Met Engn, FI-00076 Aalto, Finland
[2] Aalto Univ, Sch Chem Engn, Dept Bioprod & Biosyst, FI-00076 Aalto, Finland
关键词
BIOBUTANOL; RECOVERY;
D O I
10.1021/acs.cgd.2c01546
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The suspension freeze crystallization of aqueous 1-butanol solutions, synthetic acetone-butanol-ethanol (ABE) solutions, and ABE fermentation broth was studied as a novel concentration method that requires less energy than evaporation for water removal. The equimolar aqueous ABE solutions in a total molality range of 0-5.05 mol/kg(water) were proven to be ideal solutions based on the freezing point depression obtained. An aqueous solution of 8 wt % 1-butanol and three different types of aqueous ABE solutions (3:8:1:88 ABEW, 6:16:2:76 ABEW, and 10:17:2:71 ABEW (wt %)) were concentrated for 80 min by suspension freeze crystallization in a subcooling range from 0.24 to 1.15 degrees C. Freeze crystallization enabled 1-butanol separation from the generated mother liquor, which split into two liquid phases after ice separation, i.e., a water-enriched phase and a 1-butanolenriched phase. Ice yield values were higher for higher subcooling degrees and higher initial water content in the feed solutions. 1Butanol yields separated from the mother liquors were 9.85%, 59.46%, and 22.46% for 3:8:1:88 ABEW, 6:16:2:76 ABEW, and 10:17:2:71 ABEW, respectively, whereas two-stage freeze crystallization of the fermentation broths resulted in water removal with a maximum relative percentage of 29.5%.
引用
收藏
页码:4147 / 4153
页数:7
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