Abstract
To develop cost-effective biomaterials for efficient ethanol concentration from an ethanol-water mixture through adsorption is crucial to reduce the production cost of ethanol. In the present work, barley straw demonstrated the higher water uptake and the higher molar ratio of water to ethanol uptake compared to the wheat straw and crab shells. Important factors affecting water adsorption including particle size of barley straw, water concentration and contact time were examined. The water adsorption isotherm was well simulated by Toth equation. The results showed that the barley straw is a potential biomaterial for removing water from ethanol-water mixtures.
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