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Dehydration of Ethanol by Facile Synthesized Glucose-Based Silica

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Abstract

Bioethanol is considered a potential liquid fuel that can be produced from biomass by fermentation and distillation. Although most of the water is removed by distillation, the purity of ethanol is limited to 95–96 % due to the formation of a low-boiling point, water–ethanol azeotrope. To improve the use of ethanol as a fuel, many methods, such as dehydration, have been proposed to avoid distillation and improve the energy efficiency of extraction. Glucose-based silica, as an adsorbent, was prepared using a simple method, and was proposed for the adsorption of water from water–ethanol mixtures. After adsorption using 0.4 g of adsorbent for 3 h, the initial water concentration of 20 % (water, v/v) was decreased to 10 % (water, v/v). For water concentrations less than 5 % (water, v/v), the adsorbent could concentrate ethanol to 99 % (ethanol, v/v). The Langmuir isotherms used to describe the adsorption of water on an adsorbent showed a correlation coefficient of 0.94. The separation factor of the adsorbent also decreased with decreasing concentration of water in solution.

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Acknowledgments

This research was supported by an INHA University Research Grant (INHA-2013).

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Authors and Affiliations

  1. Department of Chemical Engineering, Inha University, Incheon, 402-751, South Korea

    Baokun Tang, Wentao Bi & Kyung Ho Row

  2. College of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210097, China

    Wentao Bi

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  1. Baokun Tang
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  2. Wentao Bi
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Correspondence to Kyung Ho Row.

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Tang, B., Bi, W. & Row, K.H. Dehydration of Ethanol by Facile Synthesized Glucose-Based Silica. Appl Biochem Biotechnol 169, 1056–1068 (2013). https://doi.org/10.1007/s12010-012-0076-z

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  • DOI: https://doi.org/10.1007/s12010-012-0076-z

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