简介:ThepolycrystallinephaseWO3/g-C3N4wassynthesizedunderstirringusingtungstenicacid(H2WO4)andgraphiticcarbonnitride(g-C3N4)asrawmaterials.ThecatalystwascharacterizedbyX-raydiffraction(XRD),scanningelectronmicroscopy(SEM),energydispersivespectroscopy(EDS),theFouriertransforminfraredspectroscopy(FT-IR),andtheBrunauer-Emmett-Telleranalysis(BET).ThepolycrystallinephaseWO3/g-C3N4wasdeterminedbyXRDtechnique.TheoxidativedesulfurizationprocesswasinvestigatedusingWO3/g-C3N4asthecatalyst,30%hydrogenperoxide(H202)astheoxidant,and1-butyl-3-methylimidazoliumtetrafluoroborate([bmim]BF4)ionicliquids(ILs)astheextractant.Theoperatingconditions,includingH2WO4amount,ILdose,H2O2volume,temperature,catalystdosage,andtypesofsulfurcompounds,weresystematicallyresearched.Thedesulfurizationratecouldreach98.46%forremovingdibenzothiophene(DBT)fromthemodeloilunderoptimalreactionconditions.Inaddition,thecatalyticactivitywasslightlydecreasedafterfiverecyclesofcatalysts.Thereactionkineticsanalysisshowsthattheoxidativedesulfurizationsystemwasinaccordwiththefirst-orderreactionkineticsequation.Themechanismofoxidativedesulfurizationwasproposed.
简介:OnOctober18—19,2018,threeR&DachievementsforrealizingtheChinesecontentofcoalchemicalindustry,includingtheDCSsystemforSinopec’slargecoaldeepprocessingproject,themethanolsyngascompressortrain,andthelargewater-cooledandgas-cooledmethanolsynthesisreactors,hadpassedtheappraisalinOrdoscityofInnerMongolia.ItislearnedthatthesethreeprojectsarebeingappliedforthefirsttimeinChina’scoalchemicalindustrytosymbolizenewbreakthroughsintheChinesecontentofmajorequipmentownedbytheSinopecCorp.,whichboastsarangeofindependentintellectualpropertyrightstopushforwardthetechnicaladvancementofnationalindustry.
简介:炼油事业部目前正在采取措施,控制3^#蒸馏原油的硫、酸指标,以确保装置的安全平稳运行。4月底,蜡油加氢装置开工后,3^#蒸馏装置加工的原油硫含量有所提高;由于高酸原油偏多、管输原油受污染、达混原油顶管线油吨位未控制好等原因,导致装置酸指标超标,对装置的平稳运行构成了一定威胁。为确保装置的稳定运行,事业部有关部门在采购原油时尽量减少高酸原油的比例;生产调度全面掌握进厂原油的硫、酸情况,合理安排原油加工方案;所有进厂原油均进行硫、酸分析,在新油种进厂进行提前采样,并抓紧报出采样数据;原油抽用罐使用前进行硫、酸分析,出现超标及时处理;原油酸不准卡边控制,避免混油不均等因素造成原油酸超标;达混原油转输时控制好管线油吨位,以减少污染。