Publicações - engenharias
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Jóse Viriato Coelho Vargas;
JACOB-FURLAN, BEATRIZ;
SILVA RIBEIRO GONÇALVES, RAFAEL;
MILÉO TAHER, DHYOGO;
LANGER, MARCELO;
AUGUSTO FERRAZ, FERNANDO;
Wellington Balmant;
Viriato Coelho Vargas, José;
BELLIN MARIANO, ANDRÉ
Palavra-chave:
sustainable electricity generation;
Incineration
Áreas do conhecimento:
Engenharias; Engenharia Mecânica; Engenharia Térmica; Aproveitamento da Energia
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AMARO BITTENCOURT, GUSTAVO;
PORTO DE SOUZA VANDENBERGHE, LUCIANA;
VALLADARES-DIESTRA, KIM KLEY;
ZWIERCHECZEWSKI DE OLIVEIRA, PRISCILLA;
CABRAL, PALOMA SOUZA;
CABRAL, PALOMA SOUZA
Palavra-chave:
Processos Biotecnologicos
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Telecomunicações
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The main objective of this study was to develop a citric acid-catalyzed hydrothermal pretreatment to reach the maximum sugar recovery from soybean hull (SH), in the context of a biorefi nery concept. A central composite design (CCD) was used to optimize pretreatment conditions through the analysis of citric acid concentration, time, and temperature effects. Optimized conditions were defined as 3.56% w/w, 46.1 min, and 135.7 °C. From the solid fraction, 99.5% and 83.0% of glucose and xylose conversion, respectively, were obtained after enzymatic hydrolysis. Sugars were fermented successfully to L-lactic acid by Lactobacillus pentosus. In fact, SH hydrolysate presented no trace of inhibitor compounds, and glucose was totally consumed during fermentation. After 24 h of fermentation, a conversion rate of 0.724 g/g of sugars to lactic acid and 80.5% of the stoichiometric theoretical yield were reached. In addition, from the liquid fraction, 47.8 mg/g of xylooligosaccharides (XOS) was produced. This work demonstrates the potential of SH to be exploited as feedstock, with mild and efficient pretreatment process, for medium- to high-value bioproducts production in biorefineries.
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VALT, RENATA BACHMANN GUIMARÃES;
PIRES, CAROLINA MOCELIN GOMES;
JERÔNIMO DE SANTANA PONTE, MARIA JOSÉ;
Haroldo de Ara[ujo Ponte
Palavra-chave:
Catalisadores de equilibrio;
Eletroremediação;
Recuperação de Lantânio
Áreas do conhecimento:
Engenharias; Tecnologia Química; Tratamentos e Aproveitamento de Rejeitos;
Engenharias; Engenharia Química; Tecnologia Química; Petróleo e Petroquímica
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Spent catalysts from fluid catalytic cracking have been a new opportunity for recovering metallic species from secondary sources, avoiding species waste, and also contributing to the circular economy, allowing the manufacture of new products. Regarding the techniques used, electrokinetic remediation coupled with selective precipitation arises as an appropriate alternative in the removal of lanthanum from refinery catalysts. To that end, the present work aimed to evaluate the recovery of lanthanum by selective precipitation using the effluent obtained from the electrokinetic remediation process of the spent catalyst from the fluid catalytic cracking process. Subsequently, some precipitation experiments were conducted in different temperatures of ammonium oxalate solutions to foster lanthanum oxalate precipitation, and the kinetic precipitation parameters were also obtained. The extraction of lanthanum ions from electroremediation resulted in 88.43%. Moreover, the best temperature to obtain lanthanum oxalate occurred at 25 °C, recovering 99.85% of the product, with an energy consumption of 100.19 W h g−1. The results indicated that the precipitation reaction fitted a first-order model, presenting an activation energy of 58.3 kJ mol−1. In light of these results, the coupling of electrokinetic remediation and selective precipitation techniques presented themselves as a suitable alternative to the recovery of metallic species from spent catalysts.
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VALT, RENATA BACHMANN GUIMARÃES;
PIRES, CAROLINA MOCELIN GOMES;
JERÔNIMO DE SANTANA PONTE, MARIA JOSÉ;
Haroldo de Ara[ujo Ponte
Palavra-chave:
Deactivated catalyst;
electrokinetic remediation;
Rare earth elements;
Chemical Kinetics;
circular economy
Áreas do conhecimento:
Engenharias; Controle Ambiental;
Engenharias; Engenharia Química; Processos Industriais de Engenharia Química; Processos Eletroquímicos;
Engenharias; Engenharia Química; Tecnologia Química; Petróleo e Petroquímica
resumo ...
Spent catalysts from fluid catalytic cracking have been a new opportunity for recovering metallic species from secondary sources, avoiding species waste, and also contributing to the circular economy, allowing the manufacture of new products. Regarding the techniques used, electrokinetic remediation coupled with selective precipitation arises as an appropriate alternative in the removal of lanthanum from refinery catalysts. To that end, the present work aimed to evaluate the recovery of lanthanum by selective precipitation using the effluent obtained from the electrokinetic remediation process of the spent catalyst from the fluid catalytic cracking process. Subsequently, some precipitation experiments were conducted in different temperatures of ammonium oxalate solutions to foster lanthanum oxalate precipitation, and the kinetic precipitation parameters were also obtained. The extraction of lanthanum ions from electroremediation resulted in 88.43%. Moreover, the best temperature to obtain lanthanum oxalate occurred at 25 °C, recovering 99.85% of the product, with an energy consumption of 100.19 W h g−1. The results indicated that the precipitation reaction fitted a first-order model, presenting an activation energy of 58.3 kJ mol−1. In light of these results, the coupling of electrokinetic remediation and selective precipitation techniques presented themselves as a suitable alternative to the recovery of metallic species from spent catalysts.
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VALT, RENATA BACHMANN GUIMARÃES;
GOMES PIRES, CAROLINA MOCELIN;
JERÔNIMO DE SANTANA PONTE, MARIA JOSÉ;
JERÔNIMO DE SANTANA PONTE, MARIA JOSÉ
Palavra-chave:
Deactivated catalyst;
electrokinetic remediation;
Rare earth elements;
Chemical Kinetics;
circular economy
Áreas do conhecimento:
Engenharias; Engenharia Química; Bioprocessos;
Engenharias; Engenharia Mecânica; Métodos Numéricos; Método de Elementos de Contorno
resumo ...
Spent catalysts from fluid catalytic cracking have been a new opportunity for recovering metallic species from secondary sources, avoiding species waste, and also contributing to the circular economy, allowing the manufacture of new products. Regarding the techniques used, electrokinetic remediation coupled with selective precipitation arises as an appropriate alternative in the removal of lanthanum from refinery catalysts. To that end, the present work aimed to evaluate the recovery of lanthanum by selective precipitation using the effluent obtained from the electrokinetic remediation process of the spent catalyst from the fluid catalytic cracking process. Subsequently, some precipitation experiments were conducted in different temperatures of ammonium oxalate solutions to foster lanthanum oxalate precipitation, and the kinetic precipitation parameters were also obtained. The extraction of lanthanum ions from electroremediation resulted in 88.43%. Moreover, the best temperature to obtain lanthanum oxalate occurred at 25 °C, recovering 99.85% of the product, with an energy consumption of 100.19 W h g−1. The results indicated that the precipitation reaction fitted a first-order model, presenting an activation energy of 58.3 kJ mol−1. In light of these results, the coupling of electrokinetic remediation and selective precipitation techniques presented themselves as a suitable alternative to the recovery of metallic species from spent catalysts.
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OLIVEIRA, DAYANA RUTH BOLA;
PROENÇA, MELISSA PASTORINI;
Jose Marques Filho;
POSSAN, EDNA
Palavra-chave:
cimento ecoeficiente;
resíduo de concreto;
Resíduos de construção e demolição;
resíduos;
empacotamento de partículas
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Telecomunicações;
Engenharias; Engenharia Civil; Construção Civil; Materiais e Componentes de Construção
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Luana Zanlorenzi Weber;
Clara Luiza de Oliveira Moreira;
KRIEGER, NADIA;
MITCHELL, DAVID ALEXANDER
Palavra-chave:
Selectivity;
specificity constant;
ping pong bi bi;
beta-galactosidase;
transglycosylation
Áreas do conhecimento:
Engenharias; Engenharia Química; Processos Industriais de Engenharia Química; Processos Bioquímicos
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Luana Zanlorenzi Weber;
Clara Luiza de Oliveira Moreira;
KRIEGER, NADIA;
MITCHELL, DAVID ALEXANDER
Palavra-chave:
Selectivity;
specificity constant;
ping pong bi bi
Áreas do conhecimento:
Ciências Biológicas; Bioquímica; cinética enzimática;
Engenharias; Engenharia Química; Processos Biotecnológicos e Alimentos
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HACKENHAAR, CELSO;
PELUZIO, JOÊNES MUCCI;
SILVA, WARLEY GRAMACHO DA;
Gideon Villar Leandro;
LIMA, MARIA DILMA DE;
HACKENHAAR, NEUSA;
NAOE, ALESSANDRA MARIA DE LIMA
Palavra-chave:
Glycine max (L.) Merrill;
Indústria Esmagadora;
Modelo Matemático;
Retorno Financeiro;
Fatores Ambientais
Áreas do conhecimento:
Engenharias; Engenharia de Produção; Pesquisa Operacional; Programação Inteira
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HASLER, CRISTINA F.S.;
Elizete Maria Lourenço;
TORTELLI, ODILON L.;
PORTELINHA, RENAN K.
Palavra-chave:
Power System State Estimation;
FACTS;
Fast Decoupled State Estimation
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Sistemas Elétricos de Potência; Geração da Energia Elétrica;
Engenharias; Engenharia Elétrica; Sistemas Elétricos de Potência; Estimação de Estados Em Sistemas Elétricos de Potência
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