Investigation of Organic Solvents Effects on Kenaf (Hibiscus cannabinus L.) Biomass Conversion in Subcritical Water

Year 2018, Volume: 5 Issue: 3, 1423 - 1430, 01.09.2018

Bahar Meryemoğlu , Arif Hasanoglu , Mehtap Kurtulus Sibel Irmak

https://doi.org/10.18596/jotcsa.427258

Abstract

Kenaf
biomass material was hydrolyzed in subcritical water condition in presence of
various organic solvents. The solvents tested were tetrahydrofurane (THF),
acetone, xylene and methanol. The organic compounds released into hydrolysates,
total organic contents, water soluble total phenol and the molecular weight
distributions of the polysaccharides in the hydrolysates, solid residues
leftover after hydrolysis and gaseous products formed during the solubilization
process were determined.

The
results showed that organic solvents significantly enhanced the dissolution of
kenaf biomass (methanol < xylene ≤ acetone ~ tetrahydrofurane). The
hydrolysis percentage was found to be between 75-82% depending on the type of
the solvent. Hydrolysis yield and total organic carbons released into
hydrolysates highly differed when the solubilization process was performed
under carbondioxide pressure and this effect considerably varied based on the
type of solvent used in hydrolysis process. The main gas product formed during
hydrolysis process was carbon dioxide with ~80% composition.

Morphological
measurements of the solid biomass residues left after hydrolysis showed
substantial degradations with increasing number of pores on the biomass
surfaces.

Keywords

Biomass, Kenaf, Organic Solvent, Hydrolysis

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