Pyrolysis of brewer’s spent grain: Kinetic study and products identification

Borel, Lidja D.M.S.; Lira, Taísa Shimosakai de; Ribeiro, J.A.; Ataíde, Carlos Henrique; Barrozo, M. A. S.

doi:10.1016/j.indcrop.2018.05.051

Cited by 60 publications

(41 citation statements)

References 53 publications

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“…In the last few decades, the need to find new environmentally friendly and sustainable technologies to produce clean energy from waste biomass has inspired scientific research to study and develop more efficient and reliable tools for waste biomass exploitation. Among these technologies, pyrolysis of agricultural and agro-industrial waste has received particular attention from the points of view of process dependent bio-char properties [1][2][3], pyrolysis kinetics [4,5], and innovative technology development [6]. Due to the high-energy needs of converting moist waste biomass through conventional dry pyrolysis, a wet pyrolysis technology, known also as hydrothermal carbonization (HTC), has gained increasing attention in the last few years.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Carbonization Kinetics of Lignocellulosic Agro-Wastes: Experimental Data and Modeling

2019

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Olive trimmings (OT) were used as feedstock for an in-depth experimental study on the reaction kinetics controlling hydrothermal carbonization (HTC). OT were hydrothermally carbonized for a residence time τ of up to 8 h at temperatures between 180 and 250 °C to systematically investigate the chemical and energy properties changes of hydrochars during HTC. Additional experiments at 120 and 150 °C at τ = 0 h were carried out to analyze the heat-up transient phase required to reach the HTC set-point temperature. Furthermore, an original HTC reaction kinetics model was developed. The HTC reaction pathway was described through a lumped model, in which biomass is converted into solid (distinguished between primary and secondary char), liquid, and gaseous products. The kinetics model, written in MATLABTM, was used in best fitting routines with HTC experimental data obtained using OT and two other agro-wastes previously tested: grape marc and Opuntia Ficus Indica. The HTC kinetics model effectively predicts carbon distribution among HTC products versus time with the thermal transient phase included; it represents an effective tool for R&D in the HTC field. Importantly, both modeling and experimental data suggest that already during the heat-up phase, biomass greatly carbonizes, in particular at the highest temperature tested of 250 °C.

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Section: Introductionmentioning

confidence: 99%

Hydrothermal Carbonization Kinetics of Lignocellulosic Agro-Wastes: Experimental Data and Modeling

2019

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“…El uso de álcalis, ácidos y solventes orgánicos son los pretratamientos más frecuentes por la eficiencia en la liberación de azúcares, sin embargo, la aplicación de altas concentraciones imposibilita la recuperación de sólidos, generan compuestos inhibitorios para los procesos fermentativos e incrementan costos de producción (Ravindran et al, 2018). La ruta termoquímica, específicamente la pirólisis permite obtener y controlar de manera más sistemática numerosos productos químicos (Borel et al, 2018), aunque hay restricciones ya que son tecnologías con altos requerimientos energéticos. Por otro lado, las conversiones por ruta biológica son preferidas a la química por ser más selectivas y promisorias para la consecución de etapas más limpias, aunque debido la complejidad de la biomasa lignocelulósica exige múltiples procesos para lograr eficiencia en las operaciones; adicionalmente, la lentitud de las reacciones biotecnológicas es una limitación y se requieren optimizar los tiempos de hidrólisis, rendimientos y productividad (Alvira et al, 2010).…”

Section: Introductionunclassified

Procesamiento de la Cascarilla de Cebada Cervecera por Vía Enzimática para la Obtención de Azúcares Fermentables

2019

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Autor a quien debe ser dirigida la correspondencia Resumen Se presenta un estudio orientado a promover la sacarificación de la cascarilla de cebada a través de la aplicación de complejos enzimáticos comerciales. La cascarilla de cebada cervecera corresponde a un residuo lignocelulósico potencial para su introducción en procesos de biorrefinería dada su composición química y alto volumen de material residual. En este contexto, Viscozyme L, Celluclast 1.5L, Hemicellulase y Xylanase fueron evaluados en función de la dosificación con el objetivo de maximizar la respuesta en azúcares reductores. La hidrólisis enzimática presentó un efecto significativo obteniéndose los mejores resultados para el complejo Viscozyme L con una máxima liberación de glucosa de 16.9 g/L. Los resultados dan viabilidad a la implementación del uso del complejo Viscozyme L., permitiendo procesos más limpios y energéticamente eficientes. Palabras clave: residuo lignocelulósico; enzimas hidrolíticas; azúcares reductores AbstractA study aimed at promoting the saccharification of brewer's spent grain through the application of commercial enzymatic complexes is presented. Brewer's spent grain corresponds to a potential lignocellulosic residue for its introduction in biorefinery processes given its chemical composition and high volume of residual material. In this context, Viscozyme L, Celluclast 1.5L, Hemicellulase and Xylanase were evaluated according to the dosage in order to maximize the response in reducing sugars. Enzymatic hydrolysis presented a significant effect, obtaining the best results for the Viscozyme L complex with a maximum glucose release of 16.9 g/L.The results indicate that the implementation of the Viscozyme L complex is possible, allowing cleaner and energy efficient processes.

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“…O grupo ainda desenvolveu estudos abordando a conversão termoquímica de biomassas como resíduos de malte, coco, macadâmia e manga. Estes processos visaram à produção de biocombustíveis por meio da pirólise (ANDRADE;VIEIRA, 2016;BOREL et al, 2018).…”

Section: Biomassasunclassified

“…As vibrações do anel aromático (Ar) são notadas em 1514 cm -1 (ÁLVAREZ-MURILLO et al, 2015). Vibrações da ligação C-O de hidroxila em álcoois primários, secundários e terciários, ésteres e éteres, podem ser observadas em 950-1200 cm -1 (BOREL et al, 2018). Os picos duplos logo antes de 3000 cm -1 estão ligados às vibrações de alongamento C-Hx assimétricas (2924 cm -1 ) e simétricas (2850 cm -1 ) (ÁLVAREZ-MURILLO et al, 2015).…”

Section: Caracterização Do Hidrocarvão Produzido Nas Condições óTimasunclassified

“…Tais processos geram produtos sólidos (biocarvão), líquidos (bio-óleo) e gasosos (syngas), sendo o produto majoritário e suas características dependentes das condições operacionais e da composição da biomassa precursora. Os processos de termoconversão são alternativas para a produção de biocombustíveis e comodites para a indústria de química fina, além da geração de carvões que também podem ser aplicados na correção de solos, suporte de proteínas e catalisadores, material adsorvente, entre outros (BOREL et al, 2018).…”

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Carbonização hidrotérmica de resíduos de acerola (Malpighia emarginata D.C.): estudo de otimização, caracterização do hidrocarvão e aplicação

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Pyrolysis of brewer’s spent grain: Kinetic study and products identification

Cited by 60 publications

References 53 publications

Hydrothermal Carbonization Kinetics of Lignocellulosic Agro-Wastes: Experimental Data and Modeling

Hydrothermal Carbonization Kinetics of Lignocellulosic Agro-Wastes: Experimental Data and Modeling

Procesamiento de la Cascarilla de Cebada Cervecera por Vía Enzimática para la Obtención de Azúcares Fermentables

Carbonização hidrotérmica de resíduos de acerola (Malpighia emarginata D.C.): estudo de otimização, caracterização do hidrocarvão e aplicação

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