10057

9287

كارشناسي ارشد

مهندسي شيمي پيشرفته

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي

1393

سيزده، [74]ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

كيخسرو كريمي، حميد اميري

اكرم زماني

28/2/94

محمدرضا احساني، حميد زيلويي

1396/09/27

كتابنامه

مهندسي شيمي

مهندسي شيمي

ID9287

Production of Acetone Butanol and Ethanol ABE from Sweet sorghum as an energy crop by Clostridium acetobutylicum Yadollah Jafari J yadollah@ce iut ac ir Date of Submission January 12 2015 Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Keikhosro Karimi karimi@cc iut ac ir Hamid Amiri h amiri@ast ui ac irAbstractIn recent years the concerns of depletion of non renewable resources and the recognition of biologicalbutanol as one of the main options to replace the current fossil fuels directed toward improving thefermentation process of acetone butanol and ethanol However the prerequisite of being a properalternative fuel it should be produced economically With this regard using of inexpensive non foodresources as a carbon source for acetone butanol ethanol ABE fermentation has been suggested forbiobutanol production in the last few years Sorghum is a promising substrate for biofuel production whichhas previously evaluated for biobutanol production The seed of sorghum is a source of starch that may beutilized for ABE production In addition its stalk contains both soluble glucose fructose and sucrose andinsoluble cellulose and hemicellulose carbohydrates that can be converted to acetone butanol and ethanol In this study sweet sorghum was evaluated as an energy crop for acetone butanol and ethanol productionby Clostridium acetobutylicum Different parts of sweet sorghum i e seeds juice and stalk alignocellulosic material have been utilized for ABE production Using a single stage extraction sorghumjuice with 35 1 g l sugars was obtained which was converted to ABE with maximum efficiency of 24 4 of ABE Before enzymatic hydrolysis an organosolv treatment with organic solution containing 50 v vacetone and 0 1 w w sulfuric acid used for the pretreatment of lignocellulosic residues bagasse Pretreatment of bagasse at 180 oC and 60 min resulted in obtaining the maximum total sugar concentration 35 3 g l through the enzymatic hydrolysis however hydrolysated bagasse pretreated at 150 oC for 90 minresulted in the highest ABE concentration 5 9 g l In addition sweet sorghum seed containing more than70 starch directly fermented to ABE with maximum yield of 37 1 Based on the results by separatefermentation of seed juice and hydrolysated of bagasse each kg of sweet sorghum produced 144 6 g of thesolvents This amount is 2 4 times greater than the amount of solvents produced by direct fermentation ofentire parts of sorghum Keywords Sweet sorghum Pretreatment Enzymatic hydrolysis Fermentation Clostridium acetobutylicum Acetone Butanol Ethanol ABE

كيخسرو كريمي، حميد اميري

اكرم زماني

محمدرضا احساني، حميد زيلويي