简介:Ni2P/ZrO2-SBA-15catalystswithdifferentzirconiumn-propoxide/SBA-15massratiosweresynthesizedtoevaluatetheirdibenzothiophenehydrodesulfurizationcatalyticactivity.EffectofZrO2introductionwasinvestigated.SupportsandcatalystswerecharacterizedbyBET,XRD,29SiNMR,XPSandFTIR.TheresultsindicatedthatzirconiumwasincorporatedintoSBA-15intheformsof[(–O–)2Si(–O–Zr)2]and/or[(–O–)3Si–O–Zr],andthattheSBA-15frameworkstructurewasmaintainedafterincorporationofZrO2.Withzirconiumcontentincreasing,ZrO2wastransformedfromamorphousphasetotetragonalphase.ZirconiumincorporationintoSBA-15supportscouldfacilitatetoformmoredispersedNi2Pactivephase.TheremightbesomeinteractionoccurringbetweenthePandZrspecies.InadditiontoNi2P,anotherkindofactivephase,ZrP,wasformed,whichmightexhibitabetterHDSactivitythanNi2P.Itwasobservedthatatatemperatureof280°C,pressureof3.0MPa,WHSVof6.5h?1andH2tooilratioof450,theNi2P/Zr-SBA(1.5)catalyst,where1.5representszirconiumn-propoxide/SBA-15massratio,showedthehighestDBTconversion,whichwas86.6%,almost35%higherthanthatoftheNi2P/Zr-SBA(0)catalyst.
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简介:摘要目的分析总结阑尾粘液性肿瘤患者的临床特点、疾病诊断和治疗方法。方法回顾性分析2012年3月—2017年9月苏州大学附属太仓医院收治的15例阑尾粘液性肿瘤患者的临床病历资料。结果15例患者中,有10例患者仅行阑尾切除,其中1例病理结果为阑尾粘液囊肿,9例为阑尾粘液性囊腺瘤;2例患者接受右半结肠切除术,病理结果均为粘液性囊腺瘤;1例患者行回盲部+双侧附件切除,病理为阑尾粘液性囊腺癌;1例患者行右半结肠切除+全子宫双附件切除术,病理证实为阑尾粘液性囊腺癌;1例因腹腔广泛转移无法行根治切除者行大网膜部分切除,活检病理证实为阑尾粘液性囊腺癌。所有患者术后定期随访,随访周期为(72±18)个月,14例患者存活,1例患者因腹腔广泛转移死亡,所有病例均无严重术后并发症。结论阑尾粘液性肿瘤临床上发病率低,症状不甚典型,腹部CT可作为进一步明确诊断的首选辅助检查,手术切除是其主要治疗方法,其关键在于尽量保证囊壁完整的情况下切除病灶,若发现及时且处理得当,阑尾粘液性肿瘤往往可获得良好的预后。