THERMOECONOMIC ANALYSIS OF COMBINED PRODUCTION OF ELECTRICITY AND SECOND GENERATION ETHANOL BASED ON THE DILUTE ACID HYDROLISIS OF SUGARCANE BAGASSE
In this study,a thermo-economic model that evaluates integrated ethanol production from sugarcane bagasse and traditional sugarcane juice is developed.Therefore,an integrated distillery,which works with first and second-generation ethanol production routes,is modeled.The model assumes that the only agricultural input to the processes is the sugarcane itself(straw or other wastes recovered from the field were not considered in the analysis).The analyses are carried out for three operating scenarios; Scenario I describes a traditional distillery or a first-generation distillery; Scenario II takes into account an integrated distillery operating with current acid hydrolysis technology; Scenario III describes an optimized distillery which operates with future technology for hydrolysis and pentose fermentation.Exergy analysis,production cost analysis and economic viability assessment are carried out for each scenario.As a result,it can be concluded that the global exergy efficiency decreases with the bagasse hydrolysis for scenario II.This situation is reversed when pentose fermentation is considered in scenario III.The economic viability assessment shows that hydrolysis is not viable in the present Brazilian economic scenario because it causes a drop of 4.0%in the internal rate of return(IRR)for scenario II and 2.3%for scenario III,when compared to scenario I.
Exergy Acid Hydrolysis Biofuel Cogeneration Second-generation ethanol
Daniel Nottoli Flório Silvio de Oliveira Junior
Mechanical Engineering Department.Polytechnic School of the University of S(a)o Paulo,Av.Prof.Mello Moraes,2231,05508-900,S(a)o Paulo,Brazil
国际会议
桂林
英文
1-14
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）