Research Center of Shanxi Province for Solar Energy Engineering and Technology, School of Energy and Power Engineering, North University of China, Taiyuan 030051, China.
Research Center of Shanxi Province for Solar Energy Engineering and Technology, School of Energy and Power Engineering, North University of China, Taiyuan 030051, China.
Bioresour Technol. 2021 Apr;325:124726. doi: 10.1016/j.biortech.2021.124726. Epub 2021 Jan 18.
Quantitative recovery is necessary for scale-up application of acidic ionic liquids (AILs). Ultrafiltration and bipolar membrane electrodialysis (BMED) was employed for the recovery and regeneration of acidic ionic liquid 1-butyl-3-methylimidazolium hydrogen sulphate (Bmim[HSO]) after biomass pretreatment. Ultrafiltration was designed for the purification of BMED feed solution. During BMED treatment, Bmim retention with OH generation occurred in mixing section and SO immigration with H generation occurred in aciding section. Resulting aqueous Bmim[OH] in mixing section and HSO in aciding section could be utilized for quantitative synthesis of Bmim[HSO]. Influence of BMED operating mode and major parameters including BMED feed concentration and current density of BMED module were studied in detail. The highest recovery ratio for Bmim and SO reached 96.2% and 96.0%. And the lowest energy consumption of specific Bmim[HSO] recovery approached 9.0 kw∙h/kg. Insight gained from this study suggested a sustainable biomass processing methodology using AILs.
定量回收对于酸性离子液体（AILs）的规模化应用是必要的。采用超滤和双极膜电渗析（BMED）对生物质预处理后的酸性离子液体 1-丁基-3-甲基咪唑硫酸氢盐（Bmim[HSO]）进行回收和再生。超滤用于 BMED 进料溶液的纯化。在 BMED 处理过程中，Bmim 在混合段发生保留和 OH 生成，而 SO 在酸化段发生迁移和 H 生成。混合段生成的水相 Bmim[OH]和酸化段生成的 HSO 可用于定量合成 Bmim[HSO]。详细研究了 BMED 操作模式和主要参数（包括 BMED 进料浓度和 BMED 模块的电流密度）的影响。Bmim 和 SO 的最高回收率分别达到 96.2%和 96.0%。而最低的特定 Bmim[HSO]回收能耗接近 9.0 kw∙h/kg。这项研究提供了一种使用 AILs 的可持续生物质处理方法。
