Extraction of Sugars and Cellulose Fibers from <i>Cannabis</i> Stems by Hydrolysis, Pulping, and Bleaching
Falguni Pattnaik, Sonil Nanda, Vivek Kumar, S.N. Naik, Ajay K. Dalai, M. Mohanty
Abstract
Abstract Cannabis indica stems were hydrolyzed with subcritical water at various temperatures, reaction times, and feed concentrations. The highest total yield of reducing sugars of 16.4 wt % was obtained at 190 °C in 37.5 min with a feed concentration of 3.5 wt %. Solid residues from the optimized process were treated with 0.5 M NaOH (pulping) and 0.5–3 % H 2 O 2 (bleaching) to isolate cellulose fibers. The maximum yield of cellulose was 34.8 wt % with lowest lignin content of 0.5 wt %. With the removal of hemicellulose and lignin through the integrated hydrothermal processes, the crystallinity index and thermal stability of the cellulose fibers increased.
Topics & Concepts
HemicelluloseCelluloseLigninChemistryHydrolysisCrystallinityExtraction (chemistry)Yield (engineering)Thermal stabilityNuclear chemistryChromatographyOrganic chemistryMaterials scienceComposite materialCrystallographyLignin and Wood ChemistryAdvanced Cellulose Research StudiesBiofuel production and bioconversion