Potassium permanganate assisted organosolv pretreatment enhances enzymatic hydrolysis of corn stover

High efficiency enzymatic hydrolysis of lignocellulose to produce fermentable sugar is important for bioconversion lignocellulosic biomass liquid fuels and chemicals. In this study, a simple pretreatment with potassium permanganate used enhance the organosolv corn stover. It testified that, compared single pretreatment, KMnO4 assisted significantly increase yields carbohydrates through decreasing degradation hemicellulose, decrease formation inhibitors stover pretreated at low temperature. Process conditions are optimized conversion glucan xylan in 72 h reach 89.45% 85.30% respectively when firstly treated 1% (w/w) 40°C 60 min prior ethanol-water 50% ethanol concentration 185°C 90 min. The differences morphological feature, fiber surface chemical compositions, crystallinity degree thermostability by without characterized scanning electron microscope, X-ray photoelectron spectroscopy, diffraction thermogravimetry explore underlying reasons strengthening process.