科研之友
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摘要
Biobutanol is primarily used as a solvent or component in surface coatings. It has characteristics similar to petroleum fuel and is considered as a superior biofuel to ethanol. Biobutanol is more energy dense and less hygroscopic than ethanol, resulting in higher possible blending ratios with gasoline. Development of technologies for biobutanol production by fermentation has resulted in higher final biobutanol concentrations, less fermentation byproducts, and higher volumetric productivities during fermentation, together with less energy intensive separation and purification techniques. These new technological developments have the potential to provide a production process for biobutanol that is economically viable in comparison to the petrochemical pathway for its production. In this study, we have analyzed and compared four different possible process designs for the purification of biobutanol production. Process modeling in Aspen Plus was performed, and the optimization was conducted using a differential evolution algorithm. Our results indicated that the process consisted of a liquidliquid equilibrium (LLE) column followed by steam stripping distillation proved to be a profitable design in current economic conditions, which was evaluated trough total annual cost (TAC) calculation. This alternative process can be employed on an industrial scale to improve the process economics of biobutanol production.
- 出版日期2015-1-14
