DOI: 10.1016/j.indcrop.2020.112236
论文题名: Economic optimization of acid pretreatment: Structural changes and impact on enzymatic hydrolysis
作者: Verma S.K. ; Shastri Y.
刊名: Industrial Crops and Products
ISSN: 9266690
出版年: 2020
卷: 147 语种: 英语
英文关键词: Acid pretreatment
; Economic optimization
; Enzymatic hydrolysis
; Global sensitivity analysis
; Integrated modelling
Scopus关键词: Bagasse
; Cost benefit analysis
; Crystallinity
; Molasses
; Profitability
; Sensitivity analysis
; Acid pretreatment
; Combined severity factors
; Economic optimization
; Global sensitivity analysis
; Integrated modelling
; Integrated optimization
; Optimal operating conditions
; Optimization studies
; Enzymatic hydrolysis
; biochemistry
; concentration (composition)
; crop residue
; enzyme activity
; factor analysis
; hydrolysis
; numerical model
; optimization
; sensitivity analysis
; waste treatment
英文摘要: Acid pretreatment (AP) is one of the most widely used processing step in the biochemical route of ethanol production from sugarcane bagasse. During AP, changes in structural features of bagasse, such as crystallinity and surface area, influence enzymatic hydrolysis (EH). Therefore, an integrated optimization study is performed by combining these two processes. Hot utility flow rate and acid concentration of AP are decision variables and the combined severity factor (CSF) of AP affects the EH yields. Three optimization studies, namely, yield maximization, profit maximization of AP, and profit maximization of AP and EH together, are considered, and the actual profit for combined AP and EH for the optimal operating condition recommended by each study are compared. The results showed that combined profit maximization improved in the actual profit as compared to yield maximization study by as much as 18–130 % across various combinations of solid loading and batch times. The benefit was due to implementation of less severe conditions in AP, reflected in 7–13 % reduction in CSF. However, it was also observed that the benefit of combined profit maximization over profit maximization of AP was a function of enzyme cost. The benefit was marginal for low enzyme cost of 0.85 $/kg, but increased up to 13.6 % for the enzyme cost of 3 $/kg. Sensitivity analysis was performed to identify batch time and enzyme cost as key exogenous parameters. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158277
Appears in Collections: 气候变化与战略
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作者单位: Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
Recommended Citation:
Verma S.K.,Shastri Y.. Economic optimization of acid pretreatment: Structural changes and impact on enzymatic hydrolysis[J]. Industrial Crops and Products,2020-01-01,147