Rapid Solvent Screening Using Thermodynamic Models for Recovery of 2,3-Butanediol from Fermentation by Liquid鈥揕iquid Extraction

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• 作者：Snehal D. Birajdar ; Sasisanker Padmanabhan ; Srinivasan Rajagopalan
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2014
• 出版时间：August 14, 2014
• 年：2014
• 卷：59
• 期：8
• 页码：2456-2463
• 全文大小：258K
• ISSN：1520-5134

文摘

Different classes of solvents were explored for liquid鈥搇iquid extraction (solvent extraction) of 2,3-butanediol (BDO) from aqueous solutions. Initially, the activity coefficients (纬^{鈭?/sup>) of BDO in various solvents were predicted using thermodynamic models, namely conductor-like-screening model-real solvents (COSMO-RS) and universal functional group activity coefficient model (UNIFAC-LL). These models were validated by comparing the distribution coefficients (K_d) predicted from modeling with experimental data for the solvents. Lower chain alcohols and derivatives of phenol showed highest K_d. 1-butanol, 2-sec-butylphenol (SBP) and cyclohexanol showed experimental K_d of 1.6, 1.2 and 0.9, respectively in aqueous fermented BDO broth. The UNIFAC-LL and COSMO-RS based predictions provided qualitative trend for the ranking of solvents, in reasonable agreement with the experimental data. In terms of numerical ability, UNIFAC-LL model performance is better compared to COSMO-RS. However, this work shows that the incorporation of newly improvised UNIFAC parameters in the UNIFAC-LL calculations provides a very satisfactory result, much closer to the experimental values. Therefore, newly parametrized UNIFAC-LL could be used for further studies on process modeling, design, and scale up of BDO extraction from aqueous solution.}