Dilute-acid hydrolysis of sugarcane bagasse at varying conditions |
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Authors: | Neureiter Markus Danner Herbert Thomasser Christiane Saidi Bamusi Braun Rudolf |
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Institution: | (1) Department of Environmental Biotechnology, Institute for Agrobiotechnology, Konrad Lorenz Str. 20, A-3430 Tulln, Austria |
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Abstract: | Sugarcane bagasse, a byproduct of the cane sugar industry, is an abundant source of hemicellulose that could be hydrolyzed
to yield a fermentation feedstock for the production of fuel ethanol and chemicals. The effects of sulfuric acid concentration,
temperature, time, and dry matter concentration on hemicellulose hydrolysis were studied with a 20-L batch hydrolysis reactor
using a statistical experimental design. Even at less severe conditions considerable amounts (>29%) of the hemicellulose fraction
could be extracted. The percentage of soluble oligosaccharides becomes very low in experiments with high yields in monosaccharides,
which indicates that the cellulose fraction is only slightly affected. For the sugar yields, acid concentration appears to
be the most important parameter, while for the formation of sugar degradation products, temperature shows the highest impact.
It could be demonstrated that the dry matter concentration in the reaction slurry has a negative effect on the xylose yield
that can be compensated by higher concentrations of sulfuric acid owing to a positive interaction between acid concentration
and dry matter contents. |
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Keywords: | Sugarcane bagasse hemicellulose dilute-acid hydrolysis |
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