2018
DOI: 10.1016/j.procbio.2017.11.015
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Concept of rice husk biorefining for levulinic acid production integrating three steps: Multi-response optimization, new perceptions and limitations

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Cited by 29 publications
(23 citation statements)
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“…This same behavior was verified by Galletti et al [31] when analyzing the production of LA with homogeneous acid catalysts in poplar sawdust, paper mill sludge, tobacco chops, wheat straw, and olive tree pruning, with 11.5 mEq HCl and 83 mEq H 2 SO 4 , at 200°C and 1 h. Authors justify the smaller concentrations of FA regarding LA due to the possibility of reactions secondary to the process, such as the formation of HUs. The same phenomenon was observed by Fleig et al [32] when converting rice husk into LA in a three-step process, being the last one (catalytic depolymerization of cellulose) run at 175°C, 5.0% w/v H 2 SO 4 and 75 min.…”
Section: Resultssupporting
confidence: 78%
See 1 more Smart Citation
“…This same behavior was verified by Galletti et al [31] when analyzing the production of LA with homogeneous acid catalysts in poplar sawdust, paper mill sludge, tobacco chops, wheat straw, and olive tree pruning, with 11.5 mEq HCl and 83 mEq H 2 SO 4 , at 200°C and 1 h. Authors justify the smaller concentrations of FA regarding LA due to the possibility of reactions secondary to the process, such as the formation of HUs. The same phenomenon was observed by Fleig et al [32] when converting rice husk into LA in a three-step process, being the last one (catalytic depolymerization of cellulose) run at 175°C, 5.0% w/v H 2 SO 4 and 75 min.…”
Section: Resultssupporting
confidence: 78%
“…Besides the already known environmental advantages of products obtained from renewable and/or biodegradable sources, the use of several sources of renewable raw materials (such as SCB for example), as well as the intensive use of their products and by-products (ethanol, sugar, lignin, and others), might help biorefineries in maximizing their profit margins [32]. Therefore, with the desire of having an attractive circular economy, the conversion of SCB into chemical products, materials, and fuels emerges nowadays as a promising alternative for the replacement of fossil resources.…”
Section: The Challenge Of the Current Circular Economy In Valuing Husmentioning
confidence: 99%
“…Um procedimento (Figura 1) para obter HUs de amostras de CA foi proposto neste trabalho e esteve baseado no conceito de biorrefinaria da CA para a produção de AL desenvolvida por FLEIG et al (2018)…”
Section: Produção E Purificação Das Husunclassified
“…No nosso artigo anterior, o AL foi obtido através da via catalítica no fracionamento da CA utilizando três estágios (FLEIG et al, 2018). No entanto, o projeto conceitual do processo sobre condições severas previu a formação de espécies carbonáceas insolúveis chamadas de huminas (HUs), tendo concluído que as HUs se formam como resultado de reações descontroladas de polimerização de 5-HMF e outros intermediários da reação (FLEIG et al, 2018).…”
Section: Introductionunclassified
“…A segunda via envolve uma série de reações catalisadas por ácido a partir de álcool furfurílico (Bozell et al, 2000). A terceira via envolve a desidratação de hexose (a saber: glucose e frutose), tipicamente levando a um aumento de rendimento de AL (Hayes et al, 2008) e a despolimerização da celulose a partir de biomassa via 5-hidroximetilfurfural (5-HMF) (Fleig et al, 2018). Atualmente a conformação de um sistema reacional virtual utilizando simuladores de processos é de completa importância para avaliar diversas condições para o processamento de resíduos agroindustriais objetivando a produção de AL com rendimentos relativamente altos.…”
Section: Introductionunclassified