Combination Of Ionic Liquid And Instant Catapult Steam Explosion For Lignocellulose Pretreatments

The lignocellulose feedstocks were used for the study of biorefinery,but due to the inefficiency of natural lignocellulose hydrolysis process.Developing novel and high efficient pretreatment methods to increase the monosaccharide conversion from regenerate materials,which is the inevitable choice for developing countries to protect their food and ecological security.1.The comparison of component features of various lignocellulose and the impact of different pretreatment.four typical lignocellulose materials were chosen for this study,by employing components analysis to select one of them for subsequent search.Jerusalem artichoke stalks was dealt with acid,alkali,soda lime,ionic liquid and instant catapult steam explosion(ICSE),respectively.Investigated component change and enzymolysis improvement of the materials after different pretreatment.Consequently,alkali can significantly change component content that the cellulose and lignin of treated materials were 57.74% and 8.23%,finally.The hemicellulose component was significantly removed by acid and ICSE,with a removal rate of 64.01% and 27.88%,respectively.ALP can significantly improve the sugar yield of feedstocks,which can reach 46.39%;and the sugar yield of ACP materials is the lowest with 21.39%.ICSE was the most efficient pretreatment of that 5 methods,the second one is ILP.2.the enhancement of ionic liquid pretreatment on rice straw by instant catapult steam explosion.In this study,1-ethyl-3-methylimidazolium chloride([Emim]Cl)were used to pretreat rice straw with ICSE.The rearrangement of components was caused by ionic liquid pretreatment,which made more cellulose exposed at the surface of rice straw and weakened the cross-link between lignin and cellulose.Through enzymatic hydrolysis analysis,ICSE enhanced the effects of ionic liquid pretreatment by improving the sugar yield.Compared with the sugar yield as using ionic liquid alone,the sugar yield as combination of ICSE and ionic liquid increased by 13.14%([Emim]Cl).The highest value reached 80.87% under the pretreatment by ICSE combine with [Emim]Cl.The structural changes were also analyzed by scanning electron microscope and thermo gravimetric analysis.The pretreated materials became more porous with larger amorphous region,and consequently the sugar yield raised.3.Combination of Ionic Liquid and Instant Catapult Steam Explosion Pretreatments for Enhanced Enzymatic Digestibility of Rice Straw.Lignocellulose rice straw was pretreated by three ionic liquids and ICSE,and their effects on feedstock morphology,chemical composition,crystallinity index,thermos ability,and glucose yield after enzymatic hydrolysis were investigated.Results showed that ionic liquid performed ideally in separation of lignocellulose components.Compared with the untreated feedstock,the addition of [Emim]Ac increased the glucose yield by 70.35% thanks to its marvelous solubility for cellulose and lignin.Moreover,the incorporation of ICSE further enhanced the degradation of lignocellulose.Compared to the sole utilization of ionic liquid,ICSE plus ionic liquid increased the glucose yield by 73.38%([Emim]Cl)and 74.01%([Bmim]Cl),respectively.ICSE tore up the feedstock into small and porous biomass with large specific surface area,which contributed to the superior performance of ionic liquid on rice straw dissolution.The structure changes of feedstock were observed by scanning electron microscopy,Fourier transformation infrared spectrometry,X-ray diffraction,and thermogravimetric analysis.