期刊
BIORESOURCE TECHNOLOGY
卷 137, 期 -, 页码 25-32出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.03.113
关键词
Poly([1-vinyl-3-hexylimidazolium] [bis(trifluoromethylsulfonyl)imide]); Adsorption; Bio-ethanol; Chamaecyparis obtuse; Fermentation broth
资金
- Basic Science Research Program through the National Research Foundation (NRF) of Korea
- Ministry of Education, Science and Technology [2012-0005 250]
Poly([1-vinyl-3-hexylimidazolium] [bis(trifluoromethylsulfonyl)imide]) (poly([VHIM][Tf2N])) was assessed for its ability to adsorb bio-ethanol from Chamaecyparis obtuse leaves fermentation broths. Poly([VHIM][Tf2N]) was prepared by poly([VHIM][Br]) ion exchange with Li(Tf2N). Poly([VHIM][Br]) was obtained using a thermal-initiated polymerization method. The factors affecting the adsorption capacity of poly([VHIM][Tf2N]), such as the initial concentration of bio-ethanol in the fermentation broth, adsorption temperature and dosage of the adsorbent, as well as the adsorption kinetics and equilibrium of poly([VHIM][Tf2N]) were investigated. The Langmuir, Freundlich and Temkin isotherms used to describe the adsorption of bio-ethanol on the adsorbent showed good correlation coefficients of 0.97, 0.96 and 0.98, respectively. A comparison of the separation factors for ethanol/water, ethanol/glucose and ethanol/xylose revealed poly([VHIM][Tf2N]) to have preferential selectivity for bio-ethanol. Compared to activated carbon, poly([VHIM][Tf2N]) exhibited higher adsorption capacity for bio-ethanol under the same adsorption conditions. The adsorbent could be used for 5 cycles with good efficiency, highlighting its reusability as an adsorbent. (C) 2013 Elsevier Ltd. All rights reserved.
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