ESTIMATIVA DA PRODUÇÃO POTENCIAL DE ETANOL A PARTIR DE DIFERENTES ESPÉCIES DE BRAQUIÁRIAS

2017 ◽  
Vol 32 (2) ◽  
pp. 178
Author(s):  
Itana Neiva Batista ◽  
Flávia Lucila Tonani De Siqueira ◽  
Guilherme Benko De Siqueira ◽  
Walysson Bernardo Rodrigues Santos ◽  
Paulo Ricardo Américo Glória

Alternativas energéticas, por meio de fontes renováveis de energia, tem sido objeto de pesquisas no mundo inteiro. Sendo assim, o material lignocelulósico consiste em uma alternativa interessante de matéria-prima. Diante disso nesse trabalho foi estudada a produção potencial de etanol de quatro espécies de braquiárias. O delineamento experimental foi inteiramente casualizado, com quatro tratamentos (Braquiárias) e quatro repetições. Os dados obtidos foram submetidos ao teste de normalidade Shapiro-Wilk e posteriormente à análise de variância pelo teste F. As médias dos tratamentos e dos seus respectivos desdobramentos foram comparadas pelo teste Scott-Knott a 5% de probabilidade. Foram avaliados os teores de fibra em detergente neutro e ácido, digestibilidade e a estimativa de produção de etanol por estequiometria. Foram observadas diferenças entre as espécies de braquiárias para o potencial de produção de etanol de segunda geração, em função da quantidade de fibra em detergente neutro digestível. As espécies B. decumbens e B. Brizantha cv. Marandu apresentaram menores potenciais de produção de etanol de segunda geração quando comparadas à B. ruziziensis e Convert HD364.Palavras-chave: Digestibilidade, etanol 2G, potencial, hidrólisePOTENTIAL ETHANOL PRODUCTION FROM DIFFERENT BRACHIARIA SPECIES ABSTRACT: Energy alternatives, through renewable energy sources, have been the subject of worldwide researches. Thus, the lignocellulosic material consists of an interesting alternative of raw material. In this work, the potential ethanol production of four Brachiaria species was studied. The experimental design was completely randomized, with four treatments (Brachiaria) and four replications. The data obtained were submitted to the Shapiro-Wilk normality test and later to the analysis of variance by the test F. The means of the treatments and their respective unfolding were compared by the Scott-Knott test at 5% probability. The levels of neutral and acid detergent fiber and digestibility were experimentally assayed and ethanol production was estimated by stoichiometry. Differences were observed between the brachiaria species for the potential of second generation ethanol production, as a function of the amount of digestible neutral detergent fiber. B. decumbens and B. brizantha cv. Marandu presented lower potential of second generation ethanol production when compared to B. ruziziensis and Convert HD364.KEYWORDS: Digestibility, 2G ethanol, potential, hydrolysis.

Author(s):  
Aissata Ousmane Kane ◽  
Vanessa O. Arnoldi Pellergini ◽  
Melissa C. Espirito Santo ◽  
Balla Diop Ngom ◽  
José M. García ◽  
...  

2021 ◽  
Vol 3 (5) ◽  
Author(s):  
Marcos Paulo Gabriel da Costa e Silva ◽  
Júlio Cesar de Carvalho Miranda

Abstract This work presents exergy analyses applied in four different conceptual second-generation ethanol production processes through a thermochemical route using catalysts based on Molybdenum (P-1), Copper (P-2), and Rhodium (P-3 and P-4), aiming to assess their exergetic efficiencies. The results show that the conceptual processes have satisfactory exergy efficiencies in both cases, when compared among themselves and when compared with other processes reported in literature. The processes’ efficiency for P-1, P-2, P-3 and P-4 were, respectively, 52.4%, 41.4%, 43.7% and 48.9%. The reactors were the sections in which exergy destruction was more significant, due to the exothermic reactions and mixing points (where streams with different temperatures were mixed). Such results show the potential of thermochemical ethanol production, besides opening the possibilities of process improvement. Graphic abstract


2017 ◽  
pp. 239-279
Author(s):  
Fernanda Bravim ◽  
Melina Campagnaro Farias ◽  
Oeber De Freitas Quadros ◽  
Patricia Machado Bueno Fernandes

Fuel ◽  
2011 ◽  
Vol 90 (4) ◽  
pp. 1624-1630 ◽  
Author(s):  
M.P. García-Aparicio ◽  
J.M. Oliva ◽  
P. Manzanares ◽  
M. Ballesteros ◽  
I. Ballesteros ◽  
...  

2016 ◽  
Vol 184 ◽  
pp. 353-364 ◽  
Author(s):  
Shveta Soam ◽  
Manali Kapoor ◽  
Ravindra Kumar ◽  
Pal Borjesson ◽  
Ravi P. Gupta ◽  
...  

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