Comparison of sulfuric and hydrochloric acids as catalysts in hydrolysis of Kappaphycus alvarezii (cottonii)

In this study, hydrolysis of marine algal biomass Kappaphhycus alvarezii using two different acid catalysts was examined with the goal of identifying optimal reaction conditions for the formation of sugars and by-products. K. alvarezii were hydrolyzed by autoclave using sulfuric acid or hydrochloric...

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Bibliographic Details
Published in:Bioprocess and biosystems engineering 2012-01, Vol.35 (1-2), p.123-128
Main Authors: Meinita, Maria Dyah Nur, Hong, Yong-Ki, Jeong, Gwi-Taek
Format: Article
Language:English
Subjects:
Acids
Biological and medical sciences
Biotechnology
Carbohydrate Metabolism - physiology
Catalysis
Catalysts
Chemistry
Chemistry and Materials Science
Comparative studies
Environmental Engineering/Biotechnology
Food Science
Fundamental and applied biological sciences. Psychology
Hydrochloric Acid - metabolism
Hydrology
Hydrolysis
Industrial and Production Engineering
Industrial Chemistry/Chemical Engineering
Original Paper
Rhodophyta - chemistry
Rhodophyta - classification
Rhodophyta - metabolism
Species Specificity
Sulfuric Acids - metabolism
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Summary:In this study, hydrolysis of marine algal biomass Kappaphhycus alvarezii using two different acid catalysts was examined with the goal of identifying optimal reaction conditions for the formation of sugars and by-products. K. alvarezii were hydrolyzed by autoclave using sulfuric acid or hydrochloric acid as catalyst with different acid concentrations (0.1–1.0 M), substrate concentrations (1.0–13.5%), hydrolysis time (10–90 min) and hydrolysis temperatures (100–130  ° C). A difference in galactose, glucose, reducing sugar and total sugar content was observed under the different hydrolysis conditions. Different by-product compounds such as 5-hydroxymethylfurfural and levulinic acid were also observed under the different reaction conditions. The optimal conditions for hydrolysis were achieved at a sulfuric acid concentration, temperature and reaction time of 0.2 M, 130 °C and 15 min, respectively. These results may provide useful information for the development of more efficient systems for biofuel production from marine biomass.
ISSN:1615-7591
1615-7605
DOI:10.1007/s00449-011-0609-9