Switchgrass is used for ethanol production. The composition of the switchgrass is 37% cellulose, 24% xylan, 3% galactan, 4% arabinan, 20% lignin, 7% extractives, and 5% ash. A dilute acid pretreatment method is applied to the switchgrass before enzymatic hydrolysis and fermentation. The pretreatment hydrolyzes 10% hexosan and 90% pentosan into monomeric sugars. Approximately 30% of the hydrolyzed pentoses further react & are decomposed to furfural. Assume that there is no decomposition of the hydrolyzed hexoses. Further Assume that lignin, extractives, and ash do not change during the pretreatment. • How much of each lignocellulosic sugar (glucose, xylose, galactose, and arabinose) is produced when pretreating 1,000 kg (dry matter) switchgrass? How much furfural is formed? • Is water consumed or produced in these pretreatment hydrolysis and dehydration reactions? How much in each?
Switchgrass is used for ethanol production. The composition of the switchgrass is 37% cellulose, 24% xylan, 3% galactan, 4% arabinan, 20% lignin, 7% extractives, and 5% ash. A dilute acid pretreatment method is applied to the switchgrass before enzymatic hydrolysis and fermentation. The pretreatment hydrolyzes 10% hexosan and 90% pentosan into monomeric sugars. Approximately 30% of the hydrolyzed pentoses further react & are decomposed to furfural. Assume that there is no decomposition of the hydrolyzed hexoses. Further Assume that lignin, extractives, and ash do not change during the pretreatment. • How much of each lignocellulosic sugar (glucose, xylose, galactose, and arabinose) is produced when pretreating 1,000 kg (dry matter) switchgrass? How much furfural is formed? • Is water consumed or produced in these pretreatment hydrolysis and dehydration reactions? How much in each?
Basic Clinical Laboratory Techniques 6E
6th Edition
ISBN:9781133893943
Author:ESTRIDGE
Publisher:ESTRIDGE
Chapter6: Basic Clinical Chemistry
Section6.5: Blood Glucose And Hemoglobin A1c
Problem 8RQ
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Transcribed Image Text:Switchgrass is used for ethanol production. The composition of the switchgrass is 37% cellulose, 24%
xylan, 3% galactan, 4% arabinan, 20% lignin, 7% extractives, and 5% ash. A dilute acid pretreatment
method is applied to the switchgrass before enzymatic hydrolysis and fermentation. The
pretreatment hydrolyzes 10% hexosan and 90% pentosan into monomeric sugars. Approximately
30% of the hydrolyzed pentoses further react & are decomposed to furfural. Assume that there is no
decomposition of the hydrolyzed hexoses. Further Assume that lignin, extractives, and ash do not
change during the pretreatment.
• How much of each lignocellulosic sugar (glucose, xylose, galactose, and arabinose) is
produced when pretreating 1,000 kg (dry matter) switchgrass? How much furfural is
formed?
•
Is water consumed or produced in these pretreatment hydrolysis and dehydration reactions?
How much in each?
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