title: Development of an estimation model for the evaluation of the energy requirement of dilute acid pretreatments of biomass.
abstract: This study aims to develop a mathematical model to evaluate the energy required by pretreatment processes used in the production of second generation ethanol. A dilute acid pretreatment process reported by National Renewable Energy Laboratory (NREL) was selected as an example for the model's development. The energy demand of the pretreatment process was evaluated by considering the change of internal energy of the substances, the reaction energy, the heat lost and the work done to/by the system based on a number of simplifying assumptions. Sensitivity analyses were performed on the solid loading rate, temperature, acid concentration and water evaporation rate. The results from the sensitivity analyses established that the solids loading rate had the most significant impact on the energy demand. The model was then verified with data from the NREL benchmark process. Application of this model on other dilute acid pretreatment processes reported in the literature illustrated that although similar sugar yields were reported by several studies, the energy required by the different pretreatments varied significantly.
authors.affiliation: School of Biosciences, Sutton Bonington Campus, University of Nottingham, Loughborough LE12 5RD, United Kingdom.
authors.forename: Oluwakemi A T
authors.initials: OA
authors.lastname: Mafe
authors.affiliation: Briggs of Burton, Briggs House, Derby Street, Burton on Trent, Staffordshire DE14 2LH, United Kingdom.
authors.forename: Scott M
authors.initials: SM
authors.lastname: Davies
authors.affiliation: Briggs of Burton, Briggs House, Derby Street, Burton on Trent, Staffordshire DE14 2LH, United Kingdom.
authors.forename: John
authors.initials: J
authors.lastname: Hancock
authors.affiliation: School of Biosciences, Sutton Bonington Campus, University of Nottingham, Loughborough LE12 5RD, United Kingdom.
authors.forename: Chenyu
authors.initials: C
authors.lastname: Du
keywords: Dilute acid pretreatment; Energy model; Energy requirement; Lignocellulosic ethanol; Solids loading rate