scholarly journals Acid Hydrolysis of Lignocellulosic Materials for The Production of Second Generation Ethanol

2021 ◽  
Author(s):  
Mariane Daniella Silva ◽  
João Pedro Cano ◽  
Fernanda Maria Pagane Guereschi Ernandes ◽  
Crispin Humberto Garcia-Cruz
Keyword(s):  
Acid Hydrolysis ◽  
Agricultural Production ◽  
Fossil Fuels ◽  
Second Generation ◽  
Reducing Sugars ◽  
Lignocellulosic Materials ◽  
Sugar Release ◽  
Different Types ◽  
Hydrolysis Of ◽  
Second Generation Ethanol

Abstract Brazil is one of the countries with the largest agricultural production in the world. Therefore, it is capable of generating large amounts of agro-industrial waste that can be used as biomass for the production of biofuels. Second generation ethanol is a renewable energy alternative, capable of replacing fossil fuels. Within this context, the objective of the present work was to study the effect of diluted acid hydrolysis in different types of lignocellulosic residues and the consequent production of 2G ethanol from these hydrolysates using different fermenting microorganisms. The acid concentration that released the highest content of fermentable sugars from the acid hydrolysis of lignocellulosic materials was 5.0% of sulfuric acid and the contact time with the biomass was 15 min. while heating in autoclave. The material that showed the highest sugar release after acid hydrolysis was cassava residues, with 131.09 g.L− 1 of reducing sugars. The fermentations were carried out with microorganisms alone and also in consortium. The largest production of 2G ethanol was from the hydrolyzate of soybean hulls, of 47.70 g.L− 1 of ethanol by the consortium of Zymomonasmobilis and Candida tropicalis, during 8 h of fermentation and showed productivity of 5.96 g.L− 1.h− 1.

Base-catalyzed Degradations of Carbohydrates. IX. β-Eliminations of 4-O-Substituted Hexopyranosiduronates

1975 ◽  
Vol 53 (14) ◽  
pp. 2182-2188 ◽  
Author(s):  
Gerald O. Aspinall ◽  
Thinnayam N. Krishnamurthy ◽  
Walter Mitura ◽  
Masuo Funabashi
Keyword(s):  
Acid Hydrolysis ◽  
Reducing Sugars ◽  
Model Compounds ◽  
Methyl Methyl ◽  
Hydrolysis Of

Two methylated disaccharides, methyl [methyl 4-O-(2,3,4,6-tetra-O-methyl-α-D-glucopyranosyl)-2,3-di-O-methyl-β-D-glucopyranosid]uronate (9) and methyl 6-O-(methyl 2,3,4-tri-O-methyl-α-D-galactopyranosyluronate)-2,3,4-tri-O-methyl-β-D-glucopyranoside (15) have been synthesized and used as model compounds for the study of the base-catalyzed β-elimination of 4-O-substituted hexopyranosiduronates without degradation of exposed reducing sugars and of the selective acid hydrolysis of hex-4-enopyranosiduronates.

Production of xylooligosaccharides by controlled acid hydrolysis of lignocellulosic materials

2009 ◽  
Vol 344 (5) ◽  
pp. 660-666 ◽  
Author(s):  
Ozlem Akpinar ◽  
Kader Erdogan ◽  
Seyda Bostanci
Keyword(s):  
Acid Hydrolysis ◽  
Lignocellulosic Materials ◽  
Hydrolysis Of

Sulfuric acid hydrolysis of various lignocellulosic materials and its mixture in ethanol production

Biofuels ◽  
2015 ◽  
Vol 6 (5-6) ◽  
pp. 331-340 ◽  
Author(s):  
Megawati ◽  
Wahyudi Budi Sediawan ◽  
Hary Sulistyo ◽  
Muslikhin Hidayat
Keyword(s):  
Sulfuric Acid ◽  
Ethanol Production ◽  
Acid Hydrolysis ◽  
Lignocellulosic Materials ◽  
Hydrolysis Of

scholarly journals Physicochemical characterization of agro-industrial residues for second-generation ethanol production

2021 ◽  
Vol 10 (8) ◽  
pp. e33110817151
Author(s):  
Igor Vieira Evangelista ◽  
Adam Gonçalves Arruda ◽  
Larissa Soares de Menezes ◽  
Janaína Fischer ◽  
Carla Zanella Guidini
Keyword(s):  
Ethanol Production ◽  
Rice Straw ◽  
Sugarcane Bagasse ◽  
Second Generation ◽  
Physicochemical Characterization ◽  
Industrial Wastes ◽  
Biofuel Production ◽  
Lignocellulosic Materials ◽  
Solid Waste Disposal ◽  
Second Generation Ethanol

Ethanol production from renewable sources, such as lignocellulosic materials, is already underway in several countries. The interest in the technology stems from concerns about global warming and the environmental impacts of solid waste disposal. Moreover, the conversion of agro-industrial wastes into ethanol is a value-adding strategy. This study aimed to evaluate the physicochemical characteristics of three lignocellulosic materials— rice straw bran, sugarcane bagasse, and corn peel bran—and determine, on the basis of these analyses, their suitability as feedstocks for second-generation ethanol production. Physicochemical characterization included the determination of particle size, moisture, ash, total solids, water activity, crude fat, protein, total extractives, soluble and insoluble lignin, holocellulose, cellulose, hemicellulose, and total carbohydrates. Rice straw bran is composed of 38.33% cellulose and 19.73% hemicellulose, sugarcane bagasse is composed of 27.09% cellulose and 5.61% hemicellulose, and corn peel bran is composed of 55.75% cellulose and 12.93% hemicellulose. The characterization showed the high concentration of cellulose in the residue of the corn peel bran. The results indicate that the three biomasses are suitable raw materials for biofuel production.

Investigation on Acid Hydrolysis of Inulin: A Response Surface Methodology Approach

2009 ◽  
Vol 5 (3) ◽  
Author(s):  
Ebrahim Eskandari Nasab ◽  
Mehran Habibi-Rezaei ◽  
Afshin Khaki ◽  
Mohammad Balvardi
Keyword(s):  
Response Surface Methodology ◽  
Acid Hydrolysis ◽  
Response Surface ◽  
Reducing Sugars ◽  
Experimental Program ◽  
Central Composite Rotatable Design ◽  
Alkaline Ph ◽  
Inulin Hydrolysis ◽  
Hydrolysis Of ◽  
Central Composite

In this study, the acid hydrolysis of inulin was investigated as a function of three variables: pH, temperature and time. Inulin hydrolysis was detected by measurement of reducing sugars, using Dinitro Salicylic acid (DNS) method. The central composite rotatable design (CCRD) was applied to design an experimental program to model the effects of acidic and alkaline pH on the inulin hydrolysis. Additionally, response surface methodology (RSM) was utilized for data analysis. The statistical analysis of the results confirmed that pH, temperature and time are significant variables at acidic pH, whereas at alkaline pH, these variables are insignificant. The maximum amount of inulin hydrolysis obtained at the pH < 2, temperature > 90°C and the time of 1 hrs.

Strategic role of nanotechnology for production of bioethanol and biodiesel

2016 ◽  
Vol 5 (2) ◽  
Author(s):  
Mahendra Rai ◽  
Júlio César dos Santos ◽  
Matheus Francisco Soler ◽  
Paulo Ricardo Franco Marcelino ◽  
Larissa Pereira Brumano ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
Energy Demand ◽  
Fossil Fuels ◽  
Second Generation ◽  
Greenhouse Gas Emission ◽  
Production Costs ◽  
Biofuel Production ◽  
Animal Fats ◽  
Second Generation Ethanol

AbstractIn spite of the limited sources of fossil fuels, energy demand has been considerably increased since the last century. The problems associated with global warming due to rising atmospheric greenhouse gas levels and scarcity of fossil fuels make it imperative to reduce our heavy dependency on fossil fuels. These reasons forced countries throughout the world to search for new fuel alternatives. Biofuel have gathered considerable attention due to their inherent benefits, like lower greenhouse gas emission, renewability, and sustainability. Commercially, biofuels are produced from vegetable oils, animal fats, and carbohydrates by using transesterification and fermentation. However, biofuel production suffers from high production costs and other technical barriers. Considering the environmental and economic issues, use of nanotechnology seems to be a viable solution. Nanoparticles have a number of interesting properties for the production of second-generation ethanol or transesterification of oils and fats to yield biodiesel. It is advantageous for recovery and reuse of catalysts. The present review discusses the role of nanotechnology in the production of bioethanol and biodiesel. Moreover, applications of nanoparticles for the production of biodiesel and second-generation ethanol with special reference to enzyme immobilization and chemical nano-catalysis have been described.

Prediction of acid hydrolysis of lignocellulosic materials in batch and plug flow reactors

2013 ◽  
Vol 142 ◽  
pp. 570-578 ◽  
Author(s):  
Oscar Johnny Jaramillo ◽  
Miguel Ángel Gómez-García ◽  
Javier Fontalvo
Keyword(s):  
Acid Hydrolysis ◽  
Plug Flow ◽  
Lignocellulosic Materials ◽  
Flow Reactors ◽  
Hydrolysis Of
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