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1、SummaryofMethanolMethanolisthesimplestalcohol,andisalight,volatile,colorless,flammableliquidwithadistinctiveodorverysimilarto,butslightlysweeterthan,thatofethanol(drinkingalcohol).Atroomtemperature,itisapolarliquid,andisusedasanantifreeze,solvent,fuel,andasade
2、naturantforethanoLItisalsousedforproducingbiodieselviatransesterificationreaction.QuestionMethanolisproducedbyreactionofcarbonmonoxidetcarbondioxideandhydrogen.Theoverallchemicalequationis:CO+2H2TCH3OHCO2+3H2TCH3OH+H2Osidereactionisreactatthesametime:CH2H2OTCO
3、+3H2CH4+2H2O—CO2+4H2CO+H2OICO2+H2CH4+CO2t2CO+2H2Thereisareactor.Theflowoffeedmaterialis1OOOkg/h.Thecompositionofsynthesisgasatlatmand40°Cis42%ofCO,22%ofCO2,12%ofH2,18%ofH2O,4%ofCH4and2%ofash.Thenthesynthesisgasiscompressedto5.5MPaand90°C.Andthenitisheatedto225
4、°C.Aftercompressingandheating,synthesisgasreactsinthereactor.Afterreacting.wecangetoutletgasat5.5MPaand255°C.Therelativehumidityofoutletgasis17.7%.Theonce-throughconversionofCO,CO2andH2inthereactoris85%,40%and45%.Afterthecondensationseparationoftheoutletgas,we
5、cangetcrudemethanolandrecycling.Therecyclingismixedwithsynthesisgas.Thecrudemethanolisputintoarectifyingcolumn.Themethanolofthecrudemethanolis60%•AndthetotalconcentrationofCO,CO2、H2andCH4is20%.Finally,wecangettheproductandeffluent.Themethanoloftheproductis85%.
6、AndCO,CO2,H2andashis0.1%,0.3%,0.1%and0.05%.Themethanoloftheeffluentis3%.Allthepercentageismassfraction.(p.s.Thedataisfake.)Pleasecalculate:(a)thecompositionofoutletgas,crudemethanohrecycling,productandeffluent-(b)thepowerrequired(inKW)forthecompressor[assumeth
7、attheheatcapacityofashis0.92x103KJ/(Kg°C)].MaterialBalances：Step1,2，and3Figure1includesalltheknownandunknownvaluesofthevariablesusingappropriatenation.Step4Selectasthebasisthegivenfeed.Basis:t=lh・•・Gs=1000kgStep5and6Theunknownmassofdifferentcomponentsoftheunkn
8、ownstreamflows（ll〜VI）arexl〜x7,yl~y7，zl〜Z7，pl〜p7，el〜e7・Themassofproductstreamisp-Themassofeffluentise.Step7and8Themassbalancesareasfollows.Molesofelementsarebalanced.I+III=III=IVMas
