生物丁醇的渗透蒸发分离膜研究进展

丁醇的分离问题是生物丁醇工业化及应用过程中急需解决的难题之一.从不同发酵-分离耦合技术的分离效果和经济效益出发,分析了渗透蒸发技术在丁醇分离中的优势.综述了渗透蒸发分离丁醇发酵液或模拟发酵液的研究进展,对聚二甲基硅氧烷(PDMS)、聚三甲基硅-1-丙炔(PTMSP)及其改性膜和其他聚合物膜的特点与分离性能进行了总结.另外,还关注了支撑液膜在丁醇分离中的应用及其存在的稳定性问题,分析了丁醇发酵液中存在的溶剂小分子、中间产物及生物大分子等对分离性能的影响.最后,对用于生物丁醇分离的渗透蒸发膜的未来发展进行了展望.

Research Progress of Pervaporation Membrane for Biobutanol Separation

Separating butanol from fermentation broth is an urgent problem to be solved in its industrialization and application. We compared different separation techniques which can be coupled with fermentation process according to their separation performance and economic efficiency and pointed out the advantages of pervaporation. Then we reviewed the recent advances in pervaporation membrane materials used in the separation of biobutanol. which focused on the separation performance of the polymer membranes and the corresponding modified polymer membranes, such as PDMS, PTMSP and their modification. Moreover, we also summarized the performance of the supported liquid membranes used in the separation of biobutanol and their stability issues. The effects of some other compositions in the fermentation broth, such as solvent, intermediate, and biomacromolecule, on the separation performance were analyzed as well. At last, future prospects of the pervaporation membrane for biobutanol were proposed.