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Processes and separation technologies for the production of fuel-grade bioethanol: a review

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Abstract

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.

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Adapted from Jeong et al. (2012) with permission from Elsevier

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SK collated and compiled the literature review. MTY initiated the concept and guided. RRK organized, rewritten, edited the manuscript and handled submission process including revision. JRK proofread, edited, and provided feedback. All authors read and approved the final manuscript.

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Correspondence to Rama Rao Karri or Mohammad Tavakkoli Yaraki.

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Karimi, S., Karri, R.R., Tavakkoli Yaraki, M. et al. Processes and separation technologies for the production of fuel-grade bioethanol: a review. Environ Chem Lett 19, 2873–2890 (2021). https://doi.org/10.1007/s10311-021-01208-9

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  • DOI: https://doi.org/10.1007/s10311-021-01208-9

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