学科分类
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2 个结果
  • 简介:对我国环境大气中PM2.5的污染状况以及石化行业对大气中PM2.5来源的贡献等进行了综述,对国家新颁布的《环境空气质量标准》(GB3095-2012)中对PM2.5的管理内容进行了解读。分析了在国家日益严格的大气细颗粒物防控形势下,石化行业所面临的环保工作任务进一步加重,环保资金和技术投入进一步增加的压力,提出了石化行业的应对措施:对PM2.5排放情况进行摸底调查,开展固定污染源排气中PM2.5的减排工作,加快油品质量升级步伐,推进挥发性有机物控制等应对措施。

  • 标签: PM2 5 大气细颗粒物 污染控制 石化行业
  • 简介:K2Ti2O5andLixK2-xTi2O5sampleswithvaryingKcontents(x=0.125,0.15,0.3),targetedonremovaloftwomainenvironmentalpollutants:PMandNOx,weresynthesizedbythesolidstatemethodusingTiO2,KNO3andLiOH·H2OasstartingmaterialsandwerecharacterizedbyX-raydiffractometry,scanningelectronmicroscopy,andBET.ThecatalyticactivityoftitanatecatalystsonPMoxidationwasevaluatedusingthetemperatureprogrammedoxidation(TPO)method.ThetestresultsshowedthattheperovskitestructureofK2Ti2O5wasstillretainedafterdopingasmallamountofLi,andthecatalyticperformanceofLixK2-xTi2O5hadbeenimprovedsignificantlycomparedwiththatofK2Ti2O5.Li0.15K1.85Ti2O5catalysthadthehighestcatalyticactivitywithanignitiontemperatureof210℃andapeaktemperatureof290℃.ThecatalyticactivityofbothK2Ti2O5andLixK2-xTi2O5underintimatecontactwashigherthanthatunderloosecontact.Whentheexhaustgasflowratewasaround100mL/min,thecatalystsamplesshowedahighestactivity.TheLidopedK2Ti2O5couldbeanexcellentcandidateforPMoxidationduetoitshighoxidationactivity,waterstability,resistancetosulfurpoisoningandeconomicaladvantages.

  • 标签: 氧化催化剂 选择性氧化 钛酸钾 PM 扫描电子显微镜 催化活性