| 초록 |
For the high utilization of abundant lignocellulose, difficult to directly convert into ethanol, an energy-efficient ethanol production process through acetic acid was examined, and its energy saving performance, economics and thermodynamic efficiency were compared with the conventional process. The raw ethanol synthesized from acetic acid and hydrogen was fed to the proposed ethanol concentration process. The proposed process utilized an extended divided wall column (DWC), of which the performance was investigated with the HYSYS simulation. The performance improvement of the proposed process includes a 27% saving of heating duty and a 41% reduction of cooling duty. The economics shows a 16% saving in investment cost and a 24% decrease of utility cost over the conventional ethanol concentration process. The exergy analysis shows a 9.6% improvement of thermodynamic efficiency in the proposed process. |
