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.
简介:石油化工企业生产过程中存在着各种职业危害因素,危害着员工的身体健康,通过开展对员工接触职业危害因素影响的探索和研究,选择了具有典型意义和典型职业危害的苯接触工人作为研究对象,研究苯对于工人的职业健康的伤害,获得现场作业员工接触毒物的真实数据,进而再推广到其它职业危害。提出作业现场职业危害因素监测的新方法和新途径,制定有针对性的预防措施,切实保护员工的身体健康。