1. Dioxane-based extraction process for production of high quality lignin
- Author
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Philip Bernstein Saynik, Mriganka Saha, Vijayanand S. Moholkar, Ritesh S. Malani, Shivangi, Prachi Arya, and Arup Jyoti Borah
- Subjects
Environmental Engineering ,Renewable Energy, Sustainability and the Environment ,020209 energy ,Extraction (chemistry) ,Bioengineering ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Solvent ,Gel permeation chromatography ,chemistry.chemical_compound ,chemistry ,Biochar ,0202 electrical engineering, electronic engineering, information engineering ,Lignin ,Char ,Solubility ,Waste Management and Disposal ,Pyrolysis ,0105 earth and related environmental sciences ,Nuclear chemistry - Abstract
In the present study, lignin was extracted from debarked bamboo waste of paper industry by soxhlet extraction method with 1,4–Dioxane as main solvent (along with small quantities of catalyst and water). 10 g of biomass results in 1.5 g of lignin through soxhlet process. The purity of extracted lignin was determined, followed by structural and thermal properties using FTIR and TGA. The elemental composition and mass of lignin was determined by elemental analyser and gel permeation chromatography (GPC). The extracted lignin was found to be highly pure, with very low (0.42% w/w) ash and negligible carbohydrate content. The solubility of extracted lignin in various organic solvents like dioxane, THF, DMF, etc. makes it advantageous over lignin derived from other processes. Pyrolytic oil and char were also obtained through pyrolysis of extracted lignin. The composition of bio-oil and biochar was analysed. The results showed that pyrolytic oil was rich in aromatic content and biochar was high in carbon content.
- Published
- 2019
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