Study On Microcrystalline Cellulose Decomposition And Its Product Make Ethanol

This paper included:1)study on cellulose liquefaction by polyethylene glycol;2)study on cellulose hydrolysis by high temperature and high pressure;3)study on cellulose hydrolyzate saccharification by Trichoderma koningii;4)study on cellulose fermentation to ethanol; The main results were as follows:1) The optimal liquefaction condition of cellulose by polyethylene glycol at150℃with conventional heating, which was obtained by the single factor experiment, was as following: ratio of liquid and solid was10:1, reaction time was3h, Sulfuric acid percentage was3%, ratio of Glycerol and polyethylene glycol was25:75.Studied the effect of power on reduce sugar rate with Microwave heating,the optimal power was226W.2) Without catalyst,the optimal hydrolysis condition of cellulose by high temperature and high pressure was as following:reaction was stopped immediately under245℃,stayed60min under217℃, stayed30min under230℃,the reduce sugar rate were19.6%、20.43%、21.18%respectively.With FeCl3·6H2O, the optimal reduce sugar rate under200℃was26.5%.3) Non-catalyst cellulose hydrolyzate of200℃、217℃and230℃saccharificated by Trichoderma koningii, the optimal reduce sugar rate were11.5%、25.15%、24.17%respectively at144h.And the optimal reduce sugar rate of hydrolyzate of stayed30min under180℃and reaction was stopped immediately under200℃with FeCl3·6H2O were24.79%.31.3%respectively at120h.4) The optimal fermentation condition of hydrolyzate with anqi yeast:the initial PH was4.8, culture time was96hours, culture temperature was32℃, the ethanol quantity achieved maximum,was0.0363g and0.1719g respectively, its biotransformation rate were70.25%and88.71%respectively.