简介:Thesupportγ-Al2O3wastreatedwith1-methylnaphthaleneasthemodelreactantbyrespectivelyusingthechemicalstaticadsorptionmethodandtheacceleratedcokingmethodtostudythecokingsitesofγ-Al2O3surface.Thecarbonspeciesformedonγ-Al2O3surfacewereanalyzedbyCAT-CS,TG-MS,IR-OH,andPy-IRtechniques.TheresultsofcharacterizationbyCAT-CSandTG-MStechniquesindicatedthatthecarbonspeciesformedduringthechemicalstaticadsorptionprocessismainlycomposedofthereversiblyadsorbedcokeprecursorswithalowly-condensedstate,whilethatformedaftertheacceleratedcokingprocessisprobablyrelatedwiththeirreversiblyadsorbedcokedepositswithahighly-condensedstate.TheresultsofcharacterizationbyIR-OHandPy-IRtechniquesfurtherimpliedthattheformationofthetwokindsofcarbonspecies,i.e.,cokeprecursorsandcokedeposits,arecloselyrelatedwiththebasichydroxylgroupsandthestrongLewisacidsitesonγ-Al2O3surface.Theresultsleadtoadeepinsightintothecokingmechanismonthealuminasurface.
简介:OnSeptember2―7,2018,theserviceteamcomposedoftechnicalpersonnelfromtheSINOPECShanghaiResearchInstituteofPetrochemicalTechnology(SRIPT)andtheSINOPECNanjingCatalystBranchCompanyhadprovidedtechnicalservicetoloadingofethylbenzenecatalystEBC-1andstart-upoftheguardreactorina500kt/abenzene/ethylenealkylationplantoftheTianjinDaguChemicalCo.,Ltd.
简介:为阐明砂砾岩储层复杂孔隙结构模态对微观剩余油的控制作用,在325块分析样品实验数据基础上,利用针对砂砾岩大颗粒的大铸体薄片分析、核磁共振复杂孔隙结构表征及CT三维立体孔隙空间扫描等技术,研究水驱/聚驱条件下砂砾岩复杂孔隙结构模态对剩余油的控制作用。结果表明:①水驱剩余油分布规律比较明显。水驱时含油饱和度在50%~100%所占频率下降快,优先被动用;②聚驱中后期,聚合物堵塞了部分水驱阶段形成的水流优势通道,形成活塞式的驱动导致含油饱和度在37.5%~50.0%被大量动用。聚驱后剩余油以孤立状分布为主,局部存在连片状;③不同孔隙结构模态在水驱/聚驱剩余油中差异较大。单模态、双模态岩心驱油效率较高,其中聚合物提高驱油效率为9.30%~18.38%。单模态岩心水驱油效率较高,而双模态和复模态岩心水驱油效率相当。聚合物提高驱油效率以双模态岩心最高,单模态次之。单模态和双模态岩心注入聚合物后,含水率下降可达20%。