【精品】化工工艺专业外语论文

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1、Studyontheco-generationofethyleneandelectricitythroughoxidativecouplingofmethaneNamewangfaSupervisorsnamezhanyuzhongDepartmentchemicalengineeringCONTENTSPAGENosBackground1Objective1Scope1MethodologyandApproach2Facilities5References6ACKGROUNDEthyleneisthemosti

2、mportantbasechemicalinthepetrochemicalindustry.Virtuallyallethyleneworldwideisproducedviacrackingofhydrocarbonfeedstock.ThefeedstockistraditionallynaphthabutnowadaysLPGandgasoilarealsoused.IntheUnitedStatesthemajorfeedstockisethane.Dependingonthefeedstock,ava

3、rietyofby-productsareformedsuchaspropylene,butadiene,andaromatics.Muchresearchhasbeendevotedtoalternativeroutesfortheproductionofethylene.Onerouteisfromnaturalgasviaoxidativecouplingofmethane(OCM).Sofar,themaximumyieldobtainedisabout20%,whichmeansthattheproce

4、ssiseconomicallyunfeasible.Recentstudies[1]haveclaimedthatthismaybeovercomebyproducingnotonlyethylenebutalsoelectricitybymakinguseoftheheatfromtheexothermiccouplingreaction.OBJECTIVE(s)Theobjective(s)ofthisresearchprojectaretodiscussafeasibilitystudyontheco-g

5、enerationofethyleneandelectricitybyoxidativecouplingofmethane.SCOPETheresearchwasevaluatedintermsofenergysavings,CO2-emissionreductionsandcosts,comparedtotheseparateproductionofethyleneandelectricitywithconventionaltechnology.METHODOLOGYANDAPPROACHTheco-gener

6、ationprocesswasevaluatedandcomparedwiththeseparateproductionofethyleneandelectricity,onthebasisofenergyuse,CO2-emissions,andcosts.Thedesignbasiswas106kt/yethylene.Theassessmentofenergyusewasbasedonexergyanalysis[11].Thecostcomparisonwasdoneinthefollowingway.A

7、ssumingthatnewethyleneproductioncapacityisneeded,thechoiceistoeitherbuildaco-generationplantoranaphthacracker・Thecostsofthesetwoplantswereconsideredindetail.Thecostofelectricityproductionisdealtwithbyassumingthattheelectricityproducedbytheco-generationplantis

8、soldatthemarketprice.Thetwopossibilitieswerecomparedbasedontheinternalrateofreturn(IRR)whichisthemaximuminterestratethataprojectcanpayandstillbreakeven[12].(a)Co-generationTheevaluationof