reuse using vapor compression
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United States of America Patent
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Mar 16, 2021
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N/A
app pub date -
Nov 19, 2020
filing date -
Nov 22, 2019
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Abstract
Systems and methods are disclosed for optimizing the process energy required for the conversion of carbon dioxide (CO2) to biochemicals through vapor compression. Mechanical or thermal vapor compression are used to minimize both the process energy and the cooling in condensers, integrating the heat required by those processes and reusing heat that is typically lost. Some variations provide a process for producing biochemicals from biomass, comprising: cooking biomass to release saccharides; fermenting the saccharides to generate a biochemical in aqueous solution, and carbon dioxide; hydrogenating the carbon dioxide with a hydrogen source to generate an additional quantity of biochemical; feeding the fermentation-derived biochemical, as well as the CO2-derived biochemical, to a distillation column for purification; and compressing vapors from the distillation column, using mechanical vapor recompression and/or thermal vapor recompression, to recover heat of distillation that is utilized elsewhere in the biorefinery to reduce overall process energy usage.
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