Cost Evaluation for Bioethanol Dehydration with Supercritical Fluids Based On First Principles Models

Nashville, USA

Conferencia; AIChE Annual Meeting 2009; 2009

The American Institute of Chemical Engineers

  In this work, we propose a rigorous model for bioethanol dehydration process with supercritical propane to minimize costs. Thermodynamic predictions are performed with an upgraded Group Contribution with Association Equation of State, GCA-EOS. As compared to the basic scheme for dehydration with supercritical fluids, vapor recompression, as well as feed preconcentration could be highly energy efficient. We further consider alternative integration schemes between process streams, associated to different nonlinear programming problems. Special attention has been devoted to a new scheme that integrates the vapor recompression scheme to the preconcentration step, which provides additional reduction in total energy consumption. We demonstrate that bioethanol dehydration can be a sustainable alternative that is energetically competitive with molecular sieves in the production of this biofuel. Abstract ID#: 165724Password: 788584Title: Cost Evaluation for Bioethanol Dehydration with Supercritical Fluids Based On First Principles ModelsSession Selection: 02H00 Poster Session: General On Separations