Effects of alkaline catalysts on acetone-based organosolv pretreatment of rice straw.

摘要: Organosolv is an effective pretreatment strategy for increasing digestibility of lignocellulosic materials owing to selectivity solvents on separating biopolymeric constituents plant biomass. In the present work, a novel low-temperature alkali-catalyzed organosolv rice straw was studied. The effects alkaline catalysts (i.e., NaOH, ammonia, and tri-ethylamine) solvent types acetone, ethanol, water) were carried out. Addition alkalis led sugar from enzymatic hydrolysis while acetone found be superior ethanol water towards cellulose preservation. optimal alkaline-catalyzed reaction contained 5% (w/v) NaOH in aqueous-acetone mixture (1:4) at 80 °C 5 min. A glucose yield 913 mg/g pretreated biomass achieved, equivalent maximal recovery 93.0% glucan native Scanning electron microscope revealed efficient removal non-cellulosic components, resulting exposed microfibers with reduced crystallite size as determined by X-ray diffraction. With potential obtaining high-quality lignin, work demonstrated acetone-based process biorefineries.