초록
<P><B>Abstract</B></P> <P>The present paper evaluates the feasibility of a process flowsheet for butanol bioproduction, as pure compound or as a blend with the biodiesel used as the liquid-liquid extraction (LLEx) solvent. In order to evidence this aspect, a modeling and simulation study was performed using Aspen Hysys commercial simulator. Process simulation results evidenced specific (per ton of butanol separated) power consumption of 22.5 kW/t and hot and cold utility specific consumptions were in power equivalences of 3.4 MW and 2.6 MW respectively. In order to achieve a feasible extraction process of biobutanol from the fermentative broth, a specific quantity of 1.125 t/t biodiesel (recovered as a blend) was required.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A continuous process separating bio butanol from fermentation broth using liquid-liquid extraction with biodiesel is proposed. </LI> <LI> Operating conditions and specific consumption of extracting agent and utilities were evaluated using Aspen Hysys. </LI> <LI> Almost all material resources could be recovered efficiently. </LI> <LI> High energy saving in the separation stage, could be realized by combining LLEx with distillation. </LI> <LI> The results evidence favorable characteristics for an efficient and sustainable process. </LI> </UL> </P>