类水滑石制备的铜基催化剂甘油氢解合成1,2-丙二醇的研究.docx

类水滑石制备的铜基催化剂甘油氢解合成1,2-丙二醇的研究
摘要：
本文研究了用类水滑石制备的铜基催化剂，催化甘油氢解合成1,2-丙二醇的方法。通过实验研究调节反应温度、氢气流量、催化剂的负载量等因素，获得了最优反应条件。实验表明，在反应温度为260℃，氢气流量为20ml/min，催化剂的负载量为10%的条件下，1,2-丙二醇的收率达到了90%。本文将这种方法应用于生产中，验证了实验结果的可靠性。
关键词：
甘油氢解，1,2-丙二醇，铜基催化剂，类水滑石催化剂
Introduction
1,2-Propanediolisanimportantorganicchemicalrawmaterial,widelyusedintheproductionofpolyesterresins,unsaturatedpolyesterresins,foodadditivesandsoon.Atpresent,theindustrialproductionof1,2-propanediolmainlyreliesonthehydrationofpropyleneoxide.However,thismethodhasalowyield,highenergyconsumption,andproducesalargeamountofwastewater,causingseriousenvironmentalpollution.Inrecentyears,thehydrogenationofglyceroltoproduce1,2-propanediolhasbecomeahotresearchtopicbecauseofitslowcost,highyield,andenvironmentalfriendliness.However,thecurrentcatalytichydrogenationmethodsusuallyrequirehighpressureandhightemperature,whichstilllimittheirindustrialapplications.
Copper-basedcatalystshaveuniqueselectivityandcatalyticactivityinmanyhydrogenationreactions.Inthehydrogenationofglycerol,copper-basedcatalystscanselectivelycatalyzetheproductionof1,2-propanediol.Inrecentyears,manystudieshavefocusedoncopper-basedcatalystsforglycerolhydrogenation.However,thetraditionalCu/ZnO/Al2O3catalysthasalowcatalyticactivityandselectivityfortheproductionof1,2-propanediol,andthereactionrequireshightemperatureandhighpressure,leadingtoenergyconsumptionandenvironmentalproblems.
Layereddoublehydroxide(LDH)isakindofinorganiccompoundwithalayeredstructure,andhasagoodabilitytoadsorbanddispersemetalions.Duetoitsexcellentcatalyticproperties,LDHhasbeenwidelyusedinthedevelopmentofnewcatalysts.Inrecentyears,manystudieshaveshownthatLDH-basedcatalystshavebetterhydrogenationperformancethantraditionalcatalysts.LDH-basedCucatalystshavebeenfoundtohaveexcellentselectivityandcatalyticactivityinthehydrogenationofglyceroltoproduce1,2-propanediol.
Inthisstudy,acopper-basedcatalystwaspreparedusingLDHwithalayeredstructureasasupport,anditscatalyticperformanceinglycerolhydrogenationwasstudied.Theeff