简介:HighresolutionmassspectrometryincombinationwithdistillationandSARAfractionationprovidesusanopportunityforin-depthunderstandingaboutthehydrotreatingprocessatthemolecularlevel.Inthisstudy,theatmosphericresiduederivedfromArabianheavycrudeanditshydrotreatedproductswereinitiallysubjectedtodistillationandSARAfractionation.ThesaturateswerecharacterizedbyGCFI/FDTOFMS.ThearomaticsandresinswerecharacterizedbyAPPIFT-ICRMS.Compositionalchangesofdifferentcompounds(paraffins,naphthenes,aromatichydrocarbons,andheteroatomiccompounds)containedindifferentdistillates(vacuumgasoil,vacuumresidue)wereobtained.Moredetailedknowledgeaboutthehydrotreatingprocesswasachieved.
简介:三维定量荧光分析在区分真假油气显示、识别井内污染、随钻检测地层含烃量变化、判断含油性质方面具有良好的应用效果。由于该技术中判断油质的关键参数——油性指数依然沿用二维算法,并不能真正反映前后主次峰的峰高变化。通过对三维定量荧光分析中波长的研究,建立了一项新的参数——MS指数,应用该参数评价显示层的原油性质效果显著,并以MS指数建立新的解释评价图板,该图板在华北油田冀中勘探重点区带取得了较好的应用成效。现场应用结果表明,MS指数的建立弥补了现有三维定量荧光技术对油质判断的局限性,新方法科学、准确,是对现有三维定量荧光技术应用的完善和补充。
简介:采用气相色谱内标法测定苯酚中的有机杂质,通过用不同极性的两根毛细管柱作比较,不同的分析要求可以采用不同的毛细管柱,对苯酚的生产和用户的质量控制具有一定的指导作用,为制定企业标准苯酚中有机杂质指标提供一定的理论依据。
简介:ThemoleculartransformationsofcarboxylicacidsinheavyacidicSLcrudebeforeandaftertrueboilingpointdistillationwereexaminedbyultra-highresolutionnegative-ionelectrosprayionization(ESI)Fouriertransformioncyclotronresonancemassspectrometry(FT-ICRMS).Theacidclass(heteroatomnumber),type(znumbers)andcarbonnumberdistributionswerepositivelycharacterized.Itwasfoundoutthatthetotalacidnumber(TAN)ofSLcrudedecreasedaftertrueboilingpointdistillation,andtheabundanceofO2classinmassspectrawasalsofoundtobereducedfrom67.6%to34.5%inSLTBPmixedcrudeasmeasuredbyMSspectra,indicatingtoapotentialcarboxylicaciddecomposition.However,itwasinterestingthatthecarboxylicacidstypedistributioninbothoilswasalmostthesamealthoughtheirrelativeabundanceinSLTBPmixedcrudeturnedtobemuchlower,suggestingthatvariouspetroleumcarboxylicacidtypeshavethesimilarthermaldecompositionreactionbehavior.Furthermore,foreachO2typeofacidsinSLTBPmixedcrude,theabundanceofcarboxylicacidswithcarbonnumberhigherthan35wasreducedgreatly,especiallyforthosewithcarbonnumberhigherthan60,themasspeaksofwhichwerenearlytotallyremoved,indicatingthatthelargecarboxylicacidmoleculesinheavyfractionsdecomposedmoresignificantlybecauseoflongerheatingtimeduringthetrueboilingpointdistillationprocess.Asaresult,thereductionofTANmaybecausedbythethermaldecompositionofcarboxylicacidsespeciallythosewithhighcarbonnumber,suggestingthatquickdistillationormuchlowerpressureisrequiredtoavoidthethermaldecomposition.
简介:本文建立了以气相色谱法测定烃中环丁砜含最的方法。用水将非芳烃和芳烃中微量的环丁砜萃取出来,用气相色谱法分析水中的环丁砜含量,再根据不同组分的萃取系数计算出烃样中的环丁砜含量。色谱柱为DB-FFAP(硝基苯二甲酸改良聚乙二醇)极性柱(10m×0.53mm×1.0μm),分流比5:1,FID检测器,外标法定量。在选定色谱条件下,建立了环丁砜质量浓度与平均峰面积的标准曲线。试验确定的水与试样的萃取比为1:8,非芳烃、苯、甲苯的平均萃取因子分别为1.00、3.00、2.13。给出了萃取系数计算公式,并验证了苯和甲苯的萃取效应不存在正相关、负相关或其他偏导关系。本方法简便可行,可以满足苯抽提装置生产过程中环丁砜含量检测的需要。