Liang Xiaocong, Wang Junyu, Guo Yongkang, Huang Zhiguo, Liu Hantao
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 Jun;330:124984. doi: 10.1016/j.biortech.2021.124984. Epub 2021 Mar 15.
Ionic liquids have been proven efficient and environmental medium for producing platform chemical levulinic acid. Lack of high-efficiency, stable and low-cost recovery strategy with complex electrolyte form restricts the further scale-up of ionic liquids for platform chemicals production. Membrane-based techniques including ultrafiltration (UF) and bipolar membrane electrodialysis (BMED) were employed for the high-efficiency recovery, regeneration and recycling of 1-ethyl-3-methylimidazolium hydrogen sulfate [Emim][HSO] for levulinic acid production from sugarcane bagasse. UF-BMED treatment works based on the interception of macromolecule biomass degradation products by UF treatment with regional recovery of Emim and SO by BMED treatment. Effect of major parameters on [Emim][HSO] recovery performance was determined. Recovery ratio for Emim and SO approached 95.4% and 95.9%. Energy consumption of specific [Emim][HSO] recovery was closed to 5.8 kWh/kg. Insight gained from this study suggests a high-efficiency and economical strategy for platform chemicals production with green solvent ionic liquids.
离子液体已被证明是生产平台化学品乙酰丙酸的高效且环保的介质。由于缺乏针对复杂电解质形式的高效、稳定且低成本的回收策略，限制了离子液体在平台化学品生产中的进一步规模化应用。采用包括超滤（UF）和双极膜电渗析（BMED）在内的基于膜的技术，对用于从甘蔗渣生产乙酰丙酸的硫酸氢1-乙基-3-甲基咪唑鎓[Emim][HSO₄]进行高效回收、再生和循环利用。UF-BMED处理的工作原理是通过UF处理截留大分子生物质降解产物，并通过BMED处理对Emim和SO₄²⁻进行区域回收。确定了主要参数对[Emim][HSO₄]回收性能的影响。Emim和SO₄²⁻的回收率分别接近95.4%和95.9%。特定[Emim][HSO₄]回收的能耗接近5.8千瓦时/千克。本研究获得的见解为使用绿色溶剂离子液体生产平台化学品提供了一种高效且经济的策略。
