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- W2571184826 abstract "Recently, a novel heat-pump-assisted extractive distillation process taking place in a dividing-wall column was proposed for bioethanol dehydration. This integrated design combines three distillation columns into a single unit that allows over 40% energy savings and low specific energy requirements of 1.24 kWh/kg ethanol. However, these economic benefits are possible only if this highly integrated system is also controllable to ensure operational availability. This paper is the first to address the challenges related to process dynamics and control of this highly integrated system. After showing the control difficulties associated with the original design owing to thermal unbalance, an efficient control structure is proposed which introduces a by-pass and an additional external duty stream to the side reboiler. The range of the external duty is rather small, about 5% of the combined duty of the reboilers, but sufficient to stabilize the system by controlling the temperature on the pre-concentration side of the column. Two quality control loops ensure product purity when the system is affected by feed flowrate and composition disturbances." @default.
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- W2571184826 date "2017-03-01" @default.
- W2571184826 modified "2023-10-10" @default.
- W2571184826 title "Dynamics and control of a heat pump assisted extractive dividing-wall column for bioethanol dehydration" @default.
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- W2571184826 doi "https://doi.org/10.1016/j.cherd.2016.12.021" @default.
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