METHODS AND SYSTEMS USEFUL FOR DRYING ETHANOL
    72.
    发明申请
    METHODS AND SYSTEMS USEFUL FOR DRYING ETHANOL 审中-公开
    用于干燥乙醇的方法和系统

    公开(公告)号:WO2012112546A2

    公开(公告)日:2012-08-23

    申请号:PCT/US2012/025042

    申请日:2012-02-14

    IPC分类号: C07C29/76 B01J20/24

    摘要: Mixtures of ethanol and water are dehydrated using starch pearls to adsorb and remove water. Vapor-phase adsorption equilibrium capacities of cassava starch pellets (tapioca pearls) having different particle sizes are disclosed, and tapioca pearl particles are shown to be surprisingly more effective for dehydrating 88 to 97% w/w feed ethanol than corn grits. The adsorption equilibrium curve and BET surface area measurement show that the adsorption capacity of tapioca pearls is a function of surface area available to water molecules. SEM images demonstrate that the particle architecture required for the adsorption and dehydration properties is that of a core- shell configuration with pre-gel starch acting as a central scaffold holding together other particles to the outer layer of the particle. The outer surface area of the pearls, populated with dry starch granules, is the main factor determining the adsorption capacity of the pearls. Tapioca pearls are shown to possess a surprisingly higher adsorption capacity than corn grits of the same particle size. Pearls of 2 mm size in diameter gave 34% higher linear adsorption equilibrium constant ( K ) than grits of 1.7 mm.

    摘要翻译: 用淀粉珍珠脱水乙醇和水的混合物,吸附去除水分。 公开了具有不同粒度的木薯淀粉颗粒(木薯珍珠)的气相吸附平衡能力,并且显示木薯珍珠颗粒比玉米砂粒脱水88至97%w / w的进料乙醇更有效。 吸附平衡曲线和BET表面积测量显示,木薯珍珠的吸附能力是水分子可用表面积的函数。 SEM图像表明,吸附和脱水性质所需的颗粒结构是核 - 壳结构的结构,其中预凝胶淀粉作为将其它颗粒保持在颗粒的外层的中心支架。 珍珠的外表面积为干淀粉颗粒,是决定珍珠吸附能力的主要因素。 木薯珍珠与具有相同粒度的玉米砂粒相比具有惊人的更高的吸附能力。 直径2毫米的珍珠比1.7毫米的砂粒提高了34%的线性吸附平衡常数(K)。