简介:SINOPECResearchInstituteofPetroleumProcessing(RIPP)hasdevelopedthedieselengineoilAPICJ-4,afterhavingpassedthe9enginetestsrequiredbytherelevantAPIspecificationstofillChina’sgapintheindependentdevelopmentofformulationsfordieselengineoilCJ-4,whichisasuccessfulattemptinbreakingtheforeigncompanies’technicalmonopolyonhigh-gradedieselengineoils.
简介:为了满足2007年美国第Ⅲ阶段排放法规对柴油机的要求,美国OEM在柴油机上普遍采用废气冷却循环(EGR)加带有连续再生催化剂镀层的微粒过滤器(DPF)。API推出了满足其要求的新的重负荷柴油机油规格CJ-4,并于2006年10月15日起进行认证。与CT-4规格相比,CJ-4规格使用了5个新的发动机试验。而且它们都带有废气循环,比CI-4规格苛刻许多。而且CJ-4规格首次提出了对柴油机油的硫、磷及硫酸灰份含量的限制指标,这样将限制含硫的APIⅠ类基础油的使用,而API、ⅡⅢ类基础油的应用将更广泛。无论是对清净剂还是抗氧抗腐剂、抗磨剂、分散剂及粘度指数改进剂,CJ-4规格都提出了新的要求。
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.