1、天津大學(xué)碩士學(xué)位論文吸熱燃料超臨界熱裂解過程抑焦技術(shù)研究姓名：朱玉紅申請學(xué)位級別：碩士專業(yè)：化學(xué)工藝指導(dǎo)教師：米鎮(zhèn)濤20070101ABSTRACTCarbondepositionfromjetfuelonmetalsurfaceswillcreateproblemsfortheoperationoffutureaircraftAsetofcontinuousflowreactorwhichsimulatesenginesystemin

2、hypersonicaircraftwassetuptOevaluatecokeformationfromthermalcrackingofjetfuelRP3undersupercriticalconditionsandthreemethodssuppressingdepositsbuildupSoliddepositscollectedonthesubstrateswereexaminedbyscanningelectronmicr

3、oscopy(SEM)，energydispersiveXrayspectroscopy(EDS)，andtemperatureprograrmnedoxidation(TPO)andcrackingproductswasanalyzedTherealethreedifferentspeciesincludingchemisorbedcarbon，amorphouscarbonandfilamentouscokeinthesolidde

4、positswhichformingfromthermalcrackingofRP一3jetfuel；Beyond90％ofcokedepositsarecarriedawaybysupercriticalfluidwhichhavehighlycapabilitiesofextractionforcokeprecursorsanddissolutionforcokedepositsCokeformationresultscarbure

5、tiononalloyThecokeinhibitor，dibenzyldiselenides，couldsuppressfilamentouscokebyformingthermalstableM2SeoverthestainlesssteelsurfaceatthehighertemperatureItisfoundthatwiththeadditionof100ppmdibenzyldiselenidesthetotalcoked

6、epositswerereducedby496％，andyieldsofgaswasreducedby20％withoutsignificantcompositionvariationchangeThepassivationofmetalsurfacecouldsuppressfilamentouscokebyformingpassivationfilmBeyond98％ofcokedepositsWasdecreasedandinfl

7、uenceoftemperaturetocokeformationareweakenedbysurfacepassivation，whichtheabilityofcokeinhibitionaredurative；Thedistributionofgasproductsproducedfrompassivereactorwasnotchanged，butthe1447％ofgasyieldswasdecreasedbypassivef

8、ilmHydrogendonors，BzOHWasaddedintofuelwhilereactormetalsurfacewaspassivedtosuppressamorphouscarbonandfilamentouscokesynchronouslyComparationtothepassivationfilm，theadditionof05％BzOHcouldreducethe15％ofcokedepositionamount

9、sandtheyieldsofgaswasreducedby16％withoutsignificantcompositionvariationchangeThethreecokeinhibition’methodsdiscussedaboveallsuppressedthecokeprecursorsformingKEYWORDS：Endothemicfuel，Thermalcracking，Coke，CokeinhibitorPass