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

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 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.

DETERMINATION OF MICRO-AMOUNTS OF 5β-PREGNAN-3α-OL-20-ONE IN URINE USING INFRARED-SPECTROMETRY

1962 ◽  
Vol 41 (2) ◽  
pp. 234-246 ◽  
Author(s):  
H. J. van der Molen
Keyword(s):  
Infrared Spectrum ◽  
Quantitative Determination ◽  
Acid Hydrolysis ◽  
Chromatographic Separation ◽  
Pure Form ◽  
Infrared Spectrometry ◽  
Hydrolysis Of

ABSTRACT A procedure for the quantitative determination of 5β-pregnan-3α-ol-20-one in urine is described. After acid hydrolysis of the pregnanolone-conjugates in urine, the free steroids are extracted with toluene. Pregnanolone is isolated in a pure form as its acetate; after chromatographic separation of the free steroids on alumina, the fraction containing pregnanolone is acetylated and rechromatographed on alumina. Quantitative determination of the isolated pregnanolone-acetate is carried out with the aid of the infrared spectrum recorded by a micro KBr-wafermethod. The reliability of the method under various conditions is discussed under the headings, specificity, accuracy, precision and sensitivity. It is possible to determine 30–40 μg pregnanolone in a 24-hours urine portion with a precision of 25%.

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