Location: Sustainable Biofuels and Co-Products
Title: Mass balance and exergy analysis of a fast pyrolysis system Authors
Submitted to: American Society of Mechanical Engineers
Publication Type: Proceedings
Publication Acceptance Date: August 22, 2011
Publication Date: N/A
Technical Abstract: Mass balance closure and exergetic efficiency is evaluated for a bench scale fast pyrolysis system. The USDA Agricultural Research Service (ARS) has developed this system for processing energy crops and agricultural residues for bio-oil (pyrolysis oil or pyrolysis liquids) production. Mass balance closure cannot be achieved due to the system size and complexity of inputs and outputs. A linear programming optimization model has been developed to use the experimental data to achieve improved closure of elemental balances without losing the overall representation of the pyrolysis products. Having improved the mass balance, it is then possible to evaluate the exergy of the system. Exergy flows are computed using statistical relationships and other standard techniques. Computational details and results are discussed for switchgrass, a typical candidate biomass.