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Challenges to Levulinic Acid and Humins Valuation in the Sugarcane Bagasse Biorefinery Concept.

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Title: Challenges to Levulinic Acid and Humins Valuation in the Sugarcane Bagasse Biorefinery Concept.
Authors: Lopes, Emília Savioli1 (AUTHOR), Leal Silva, Jean Felipe1 (AUTHOR), Rivera, Elmer Ccopa1,2 (AUTHOR), Gomes, Alana Petrina3 (AUTHOR), Lopes, Melina Savioli4 (AUTHOR), Maciel Filho, Rubens1 (AUTHOR), Tovar, Laura Plazas3 (AUTHOR) laura.tovar@unifesp.br
Source: BioEnergy Research. Sep2020, Vol. 13 Issue 3, p757-774. 18p.
Subjects: Bagasse, Sugarcane, Lignins, Hemicellulose, Valuation, Economic research, Delignification
Abstract: Levulinic acid (LA) is currently one of the most promising chemicals derived from biomass. However, its large-scale production is hampered by the challenges in biomass hydrolysis and the poor selectivity due to the formation of humins (HUs). This study addresses these challenges using the biorefinery concept of biomass fractionation. A three-step process (pretreatment, delignification, and acid-catalyzed conversion) was optimized to produce LA from SCB considering the yield (YLA), efficiency (ELA), and concentration of LA (CLA) as functions of temperature, reaction time, acid concentration, and solids loading. By means of a multi-response optimization, values of YLA (20.9 ± 1.25 g/100gISF-D), ELA (37.5 ± 2.24 mol%), and CLA (25.1 ± 1.50 g/L) were obtained at 180 °C, 75 min, 7.0% w/v H2SO4, and 12.0% w/v of solids loading. Six scenarios for production of LA were analyzed in terms of yields of LA, HUs, lignin, and other sugar-derived products considering one-, two-, or three-step processes. The economic analysis indicated that the three-step scenario delivers better economic figures given that other valuable biomass fractions (hemicellulosic sugars and lignin) are better used and contribute to the overall economic performance of the process. The results also demonstrate the burden of HUs in the economics of the process because it was shown that the largest production of LA is also linked to the largest formation of HUs, which does not necessarily yield the best economic results. These findings indicate the importance of added value by-products for the profitable production of LA in biorefineries. [ABSTRACT FROM AUTHOR]
Copyright of BioEnergy Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Challenges to Levulinic Acid and Humins Valuation in the Sugarcane Bagasse Biorefinery Concept.
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  Data: <searchLink fieldCode="AR" term="%22Lopes%2C+Emília+Savioli%22">Lopes, Emília Savioli</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Leal+Silva%2C+Jean+Felipe%22">Leal Silva, Jean Felipe</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rivera%2C+Elmer+Ccopa%22">Rivera, Elmer Ccopa</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gomes%2C+Alana+Petrina%22">Gomes, Alana Petrina</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lopes%2C+Melina+Savioli%22">Lopes, Melina Savioli</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Maciel+Filho%2C+Rubens%22">Maciel Filho, Rubens</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tovar%2C+Laura+Plazas%22">Tovar, Laura Plazas</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> laura.tovar@unifesp.br</i>
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  Data: <searchLink fieldCode="JN" term="%22BioEnergy+Research%22">BioEnergy Research</searchLink>. Sep2020, Vol. 13 Issue 3, p757-774. 18p.
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  Data: <searchLink fieldCode="DE" term="%22Bagasse%22">Bagasse</searchLink><br /><searchLink fieldCode="DE" term="%22Sugarcane%22">Sugarcane</searchLink><br /><searchLink fieldCode="DE" term="%22Lignins%22">Lignins</searchLink><br /><searchLink fieldCode="DE" term="%22Hemicellulose%22">Hemicellulose</searchLink><br /><searchLink fieldCode="DE" term="%22Valuation%22">Valuation</searchLink><br /><searchLink fieldCode="DE" term="%22Economic+research%22">Economic research</searchLink><br /><searchLink fieldCode="DE" term="%22Delignification%22">Delignification</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Levulinic acid (LA) is currently one of the most promising chemicals derived from biomass. However, its large-scale production is hampered by the challenges in biomass hydrolysis and the poor selectivity due to the formation of humins (HUs). This study addresses these challenges using the biorefinery concept of biomass fractionation. A three-step process (pretreatment, delignification, and acid-catalyzed conversion) was optimized to produce LA from SCB considering the yield (YLA), efficiency (ELA), and concentration of LA (CLA) as functions of temperature, reaction time, acid concentration, and solids loading. By means of a multi-response optimization, values of YLA (20.9 ± 1.25 g/100gISF-D), ELA (37.5 ± 2.24 mol%), and CLA (25.1 ± 1.50 g/L) were obtained at 180 °C, 75 min, 7.0% w/v H2SO4, and 12.0% w/v of solids loading. Six scenarios for production of LA were analyzed in terms of yields of LA, HUs, lignin, and other sugar-derived products considering one-, two-, or three-step processes. The economic analysis indicated that the three-step scenario delivers better economic figures given that other valuable biomass fractions (hemicellulosic sugars and lignin) are better used and contribute to the overall economic performance of the process. The results also demonstrate the burden of HUs in the economics of the process because it was shown that the largest production of LA is also linked to the largest formation of HUs, which does not necessarily yield the best economic results. These findings indicate the importance of added value by-products for the profitable production of LA in biorefineries. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of BioEnergy Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s12155-020-10124-9
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        Text: English
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        StartPage: 757
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      – SubjectFull: Bagasse
        Type: general
      – SubjectFull: Sugarcane
        Type: general
      – SubjectFull: Lignins
        Type: general
      – SubjectFull: Hemicellulose
        Type: general
      – SubjectFull: Valuation
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      – SubjectFull: Economic research
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      – SubjectFull: Delignification
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      – TitleFull: Challenges to Levulinic Acid and Humins Valuation in the Sugarcane Bagasse Biorefinery Concept.
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              Text: Sep2020
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