简介：TheproductdistributionandgasolinequalityofFCCprocess,especiallytheolefincontent,heavilydependsonthecatalystperformanceintermsofselective/non-selectivehydrogentransferreactionselectivity.Areliableexperimentalprotocolhasbeenestablishedbyusingn-dodecaneasaprobemoleculetocharacterizetheselectivehydrogentransferabilityofcatalyticmaterials.Theresultsobtainedhavebeencorrelatedwiththeperformanceofthepracticalcatalysts.

简介：

简介：为在裂开的炉子试管由金属的CAS研究所发明了的蒸气的强迫的热传递的技术是成功地在SINOPEC系统以内适用并且被同意SINOPEC“s首先在2006在科技前进上分级奖品。

简介：Inthecourseofsteamcrackingthefurnacetubesareapttocokinginsidethetubewall,whichnotonlycanaffecttheheattransferefficiencyofthefurnace,butalsoneedsregu-larshutdownfordecokingthatcanreducetheoperatingcycle

简介：Thenaturalconvectionheattransferofa60%sucrosesolutioninaverticalconverging-divergingtube(CD)withregularly-spacedtwistedtapes(RSTT)hasbeeninvestigatednumericallyandexperimentally.TheeffectsofwalltemperatureandnumberofRSTTontheNusseltnumberwerestudiedindetail.Thedistributionsofvelocityandtemperatureinthe60%sucrosesolutionwerestudiedandthesimulatedresultsofCDwithRSTTwerecomparedwiththoseofthesmoothtube.TheinfluenceofRayleighnumberandRSTTontheNusseltnumberwasconductedexperimentally.TheresultsindicatethattheNusseltnumberofthe60%sucrosesolutionobviouslyincreasedwiththenumberofRSTTbutincreasedinconspicuouslywith2andmoretwistedtapes.Thesimulationshowsthatthedistanceforachievinganoptimalheattransferperformanceis46timesthediameterofthetube.Themechanismofthenaturalconvectionheattransferenhancementofthe60%sucrosesolutioninrelationshipwiththeCDandtheRSTTwasanalyzed,andthechangeofaveragetangentialvelocitywiththeaxialdistancewaspresentedtodemonstratethattheenhancementofheattransferwasrealizedmainlybecauseoftheincreaseintangentialvelocity.