Bioethanol produced from biological resources is considered as an alternative, renewable, and sustainable energy source in the context of the circular economy. Moreover, bioethanol is a biofuel that has similar energy content to gasoline, but emits less toxic pollutants compared to fossil fuels. Yet bioethanol must be anhydrous to be mixed with regular gasoline and is then utilized as a vehicle fuel. Different techniques have been developed to obtain anhydrous ethanol. Here, we compare techniques for dehydration of bioethanol, including adsorption and distillation. We present the performance of the process, product recovery, and energy consumption of the pressure swing adsorption method, which is effective and widely used.

在循环经济的背景下，由生物资源生产的生物乙醇被认为是替代，可再生和可持续的能源。此外，生物乙醇是一种生物燃料，具有与汽油相似的能量含量，但与化石燃料相比排放的有毒污染物较少。然而，生物乙醇必须是无水的才能与普通汽油混合，然后用作车辆燃料。已经开发了不同的技术来获得无水乙醇。在这里，我们比较了生物乙醇脱水的技术，包括吸附和蒸馏。我们介绍了变压吸附法的工艺性能，产品回收率和能耗，这些方法是有效且广泛使用的。