纳滤(nf)2f反渗透(ro)分离和浓缩木质纤维素模型水解液的实验分析

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1、武汉工程大学硕士学位论文(3)Previousresearchesreportedthataceticacidwithhighconcentrationinhydrolyzatescouldstronglyinhibitthemicroorgamismfermentation.However,aceticacidwithlowconcentrationcouldconverselyimprovethegrowthofmicroorganismandincreasetheproductivityofethanol.Thus,ke

2、epingaceticacidwithlowconcentrationinhydrolyzatesisamoreeffectiveandeconomicdetoxificationway.Meanwhile,inordertoretainsugarasmuchaspossible,ROmembraneismoresuitableforseparationaceticacidfromhydrolyzates.(4)Theoptimalseparationparameterswereobtainedbyfurtheroptimiz

3、ationexperimentofoperationconditionsofthebestmembrane(RO98pHt),thatpH2.93o(initialpH),40Cand20bar.(5)Theresultobtainedfromthereal4-timesconcentratingexperimentoflignocellulosicmodelhydrolyzatesisthat99.61%recoveryofxylose,99.69%recoveryofglucoseand66.76%removaloftot

4、alaceticacidcontent.Theresultobtainedfromthediafiltrationexperimentof3-timesconcentratedmodelsolutionisthat99.09%recoveryofxylose,99.22%recoveryofglucoseand75.46%decreasinginaceticacidconcentrationwhentheseparationfactorreached4.Theabovementionedresultsdemonstrateth

5、atseparationprocessofRO98pHtmembranecaneffectivelyandsimultaneouslyseparateaceticacidinhydrolyzatesaswellasrecoverandconcentrate99%ofmonosaccharides.Keywords:Nanofiltration(NF);ReverseOsmosis(RO);Modelhydrolyzates;Aceticacid;MonosaccharidesIV万方数据目录目录摘要..............

6、.........................................................................................1Abstract.....................................................................................................III目录..............................................................

7、............................................V第1章文献综述........................................................................................11.1前言...................................................................................................11.2木质纤维素及其结构........

8、..............................................................21.2.1纤维素...................................................................