正丁醇

Abstract(#br)Butanol has potential to become an important renewable transportation fuel and feedstock chemical in the future. However, low yield and high separation costs are the main obstacles in feasible industrial scale biobutanol production by the acetone–butanol–ethanol (ABE) fermentation process. Both problems can be overcome by using pervaporation as the product removal technique. The performance of a polydimethylsiloxane (PDMS) membrane with a support layer of polyacrylonitrile (PAN) was studied for the removal of acetone, butanol and ethanol from dilute aqueous model solutions.

Pervaporation of Butanol from their Aqueous Solution using a PDMS-Zeolite Composite Membranen-Butanol;Pervaporation;PDMS-Zeolite;Zeolite Membrane;Pervaporation is known to be a low energy consumption process since it needs only an electric power to maintain the permeate side in vacuum. Also, the pervaporation is an environmentally clean technology because it does not use the third material such as an entrainer for either an azeotropic distillation or an extractive distillation.

摘要\n在渗透汽化过程中，由于所需膜面积较小，高通量膜可以缓解工业放大的成本问题。本文采用一种新颖的原位合成( ISS )方法制备了具有优异透气性的ZIF-8 / PDMS混合基质膜( MMMs )。ZIF-8具有较高的疏水性，得益于其灵活的孔结构，可为选择性回收有机物提供合适的孔结构。在膜制备过程中，C ( PDMS /正硅酸乙酯/ Zn2 )溶液和D ( PDMS /二月桂酸二丁基锡/ 2 -甲基咪唑)溶液通过旋涂的方法在C - D界面上共处理。ZIF - 8结晶与PDMS聚合耦合发生。形成了有效的活性层，包括( i )连续无缺陷的PDMS层和( ii )可以添加可通过的扩散通道的ZIF-8 / PDMS层，解除了多孔材料物理掺入的障碍。基于ISS法的无缺陷MMMs在20 wt % ZIF-8负载量下，正丁醇渗透汽化回收的总通量为2046.3 g / m2 h (是纯PDMS膜的1.6倍)，分离因子没有下降。采用ISS法制备的ZIF-8 / PDMS MMM在正丁醇分离中显示出良好的应用前景。