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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Lopes, Emilia Savioli [1] ; Silva, Jean Felipe Leal [1] ; Rivera, Elmer Ccopa [1, 2] ; Gomes, Alana Petrina [3] ; Lopes, Melina Savioli [4] ; Maciel Filho, Rubens [1] ; Tovar, Laura Plazas [3]
Total Authors: 7
Affiliation:
[1] Univ Estadual Campinas, Sch Chem Engn, BR-13083852 Campinas, SP - Brazil
[2] Andrews Univ, Dept Engn, Berrien Springs, MI 49104 - USA
[3] Univ Fed Sao Paulo, Dept Chem Engn, BR-09913030 Diadema, SP - Brazil
[4] Univ Fed Alfenas, Dept Chem Engn, BR-37715400 Pocos De Caldas, MG - Brazil
Total Affiliations: 4
Document type: Journal article
Source: BioEnergy Research; v. 13, n. 3 APR 2020.
Web of Science Citations: 1
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 (Y-LA), efficiency (E-LA), and concentration of LA (C-LA) as functions of temperature, reaction time, acid concentration, and solids loading. By means of a multi-response optimization, values of Y-LA (20.9 +/- 1.25 g/100g(ISF-D)), E-LA (37.5 +/- 2.24 mol%), and C-LA (25.1 +/- 1.50 g/L) were obtained at 180 degrees 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. (AU)

FAPESP's process: 15/17592-3 - Production optimization and obtainment of levulinic acid from sugarcane bagasse and molasses
Grantee:Emília Savioli Lopes
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 15/20630-4 - Biorefinery development integrated to a bioethanol sugar cane plant with zero CO2 emission: routes to convert renewable resources to bio-products and bio-electricity
Grantee:Rubens Maciel Filho
Support type: Research Projects - Thematic Grants
FAPESP's process: 16/10450-1 - Process development for sugarcane converstion to ethyl levulinate: a route for a viable biodiesel additive
Grantee:Jean Felipe Leal Silva
Support type: Scholarships in Brazil - Master
FAPESP's process: 17/23335-9 - Biorefinery development integrated to a bioethanol sugar cane plant with zero CO2 emission: routes to convert renewable resources to bio-products and bio-electricity
Grantee:Elmer Alberto Ccopa Rivera
Support type: Scholarships in Brazil - Technical Training Program - Technical Training