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

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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：与哈尔滨Devi自动化设备发展公司合作的Daqing石油化学的同伴的号码2化学植物，有限公司在butanol/octanol单位的含氧合成的反应堆采用了没有模型的控制系统完全在一次尝试在反应堆解决对CO集中的稳定的控制的问题在与反应化工物品的关系在含氧合成的反应堆优化反应条件，导致反应尾巴气体的分泌物和丙烯的减少的单位消费的重要减小。

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.

简介：TheesterificationoflauricacidwithmethanolcouldbeefficientlycatalyzedbyZrOCl2·8H2O,andthisreactionwasstudiedtodevelopagreenmethodforbiodieselproduction.Theinfluencingfactors,suchasamountofcatalyst,reactiontimeandmolarratioofacidtomethanol,wereinvestigated.TheresultsindicatedthattheZrOCl2·8H2Ocatalystshowedhighcatalyticactivity,andgavea97.0%methyllaurateconversionrateunderthefollowingoptimizedconditions,viz.:alauricacid/methanolmolarratioof1:10,acatalystdosageof4%,andareactiondurationof2hatmethanolrefluxingtemperature.Thecatalystcouldbeeasilyrecoveredwhileitsactivitycouldbewellretainedafterthreecycles.TheZrOCl2·8H2Ocatalystalsoexhibitedexcellentcatalyticactivityfortheesterificationofdifferentfreelong-chainfattyacids(includingnonedibleoilswithhighacidvalue)withdifferentshortcarbonchainalcohols.Therefore,theZrOCl2·8H2Ocatalysthasgoodpotentialforthesynthesisofbiodieselfromlow-costfeedstockssuchaswastevegetableoilsandnon-edibleoils.