超臨界條件下正構(gòu)烷烴催化裂解和積碳研究.pdf

1、超臨界條件下正構(gòu)烷烴催化裂解和積碳研究CatalyticCrackingofnAlkanesandCokeDepositeunderSupercriticalCondition國家“八六三”計(jì)劃項(xiàng)目(2003AA723101)(申請(qǐng)碩士學(xué)位)專業(yè)：研究生：指導(dǎo)教師：化學(xué)工藝王占衛(wèi)張香文天津大學(xué)化工學(xué)院2005年1月AbstractAbstractAstheavailableeffectivecoolantusedinhypersonic

2、vehiclesover5Mach，thephysicalheatcannotmeetthedemandofhypoersonicflightover5MachTomeetthischallege，endothermicfuels，whichcallchemicallydecomposeintoenergeticgasesviacrackingreactionsandprovideextremelyhighchemicalheatsin

3、khavebeendevelopedThesefuelsprovidethecoolingfurhypersonicflightandconvertthefuelintosmallhydrcarbonsthatcanbeburnedinahypersoniccombustorNumerousstudieshavebeenpublished011theendothermicfuels，whichincludedthechoiceoffue

4、ls，thetypesofcrackingreaction，theimprovementoffuelspefurmanceandtestoffuelsonpracticalaircraftThepresentworkisfocusedoncatalyticcrackingoffuelsThemaincontentswere∞follows：thecatalyticcrackingofndecaneandndodecanethecoked

5、epositeonthecatalystThesupercriticalpropertiesoffuelswerecalculatedbyusingSUPERSTRAPPsoftware(codedbyNISnTheresultsshowedthatthepeopertiesoffuelsaresignificantlydifferentfromthatunderatmosphere，whichhavegreateffectonreac

6、tionoffuelsThesupercriticalcatalyticcrackingofndecaneandndodecanewasstudiedTheeffectsofpressure、temPeratureandfeedstock’SfluxrateontheconversitionandyieldsofgaswerestudiedTheresultsshowedthattheconversitionsandyieldsofga

7、sincreasedasthecrackingtemperaturerisedAsincreasingofthecrackingpressuretheconversitionandyieldofgasdecreasedAfteranalyzingthecompentsofthetwofuelscarekingproducts，thecontentofarcomaticcompentswerehigherunderatmosphereth

8、anthatundersupercriticalconditionThemajorgasproductsincludedC3C4compentsandH2ThestudyoncokedepositsshowedthatthecokedepositesdecreasedasthecrackingtemperatureincreasedThehighercrackingpressureledtOmorecokedepositesAsthec

9、rackingtemperaturerising，theoutsidecokedepositesincreasedandtheinsidecokedepositedeclinedResearchwasputonthesupercriticalcatalyticcrackingofTJ一02ThegasproductsincludedgreatamountofH2Keywordsendothermicfuels，n—decane，n—do