Selective separation of biomass from black liquor waste by inorganic and organic acids
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Lignin biomass has been investigated over the last few decades as a promising resource of many green chemicals and materials. It forms basis of sustainable development but needs scientific support and exploration. In the present work lignin biomass was precipitated from the Kraft black liquor of hardwood and bamboo by using inorganic and organic acids at pH 2, 4, 7,9,10 respectively in order to estimate optimum isolation conditions. A comparative study was performed among the lignin biomass so obtained, based on yield and chemical structure and thermal stability. The results showed that the best conditions occurred with lignin precipitation, at 9 pH temperature 50 oC, using H3PO4 and acetic acids for maximum yield. The residual lignin biomass was subjected to physico - chemical characterization by TGA and DTG to evaluate the lignin for various possible value added applications. The investigations showed that biomass from different acids differ significantly in Td (Thermal decomposition value in OC) values as follows TdH3PO4=304
[Shailaja V. Kamble and Y.C. Bhattacharyulu (2015); Selective separation of biomass from black liquor waste by inorganic and organic acids Int. J. of Adv. Res. 3 (Jan). 0] (ISSN 2320-5407). www.journalijar.com
