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ID:34631933
大小:2.98 MB
页数:69页
时间:2019-03-08
《蜂窝状氧化铝空心微球负载钴-钼脱硫催化剂的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、究,主要得出以下结论:1.研究了葡萄糖交联碳球制备条件对氧化铝载体性能的影响,其中胶体碳球水热合成的温度,时间以及合成之后的洗涤对载体性能影响较大。实验选择180℃,反应6h的碳球作为模板。通过正交实验优化了载体的制备条件,并对所得载体进行了比表面积、孔结构以及XRD,SEM等测试,制备出了比表面积较大,有小孔和过渡孔两种孔结构,形貌均匀的蜂窝状氧化铝空心微球结构的载体。2.以二氧化硫的脱除率为评价标准对催化剂的制备条件进行了筛选,其中钴、钼催化剂采用先浸渍钴、后浸渍钼,其质量含量分别为4%、14%,活性组分浸
2、渍4h,焙烧温度为550℃时,催化剂的活性最好,脱硫率达到92.3%,并且连续运转42h后催化剂仍具有较高的活性,认为此种特殊的空心结构是使催化荆有较好稳定性的重要原因。3.对蜂窝状氧化铝空心微球负载的钴、钼脱硫剂的催化还原机理进行了研究,并进一步研究了反应动力学,得到的动力学方程为:Rs02=6.7X104·exp(.1.669x104/RT)·Cs02·(二()D关键词:脱硫催化还原空心微球钴一钼、蜂窝状氧化铝空心微球负载的钻一钼脱硫催化剂的研究Co—MoDESULFURIZATl0NCATAIYSTLOA
3、DEDONHOLLOWMICRO.SPHERESOFALUMINAWITHHoNE.YCOMBSTRUCTI瓜EABSTRACTCoal,asthemajorsourceofenergyinourcountry,producesalargenumberofS02aftercombustion,anditsemissionreachesthefirstintheworld.ThepollutionofS02hasbecomeadifficultproblem,yetthereisnogoodsolution.We
4、tdesulphurizationiscurrentlythemainmethod,butthisproducesalargenumberofsecondarypollution.Therefore,drydesulfurizationhasbeenraisedinrecentyears,andoneofthismethodistodirectcatalyticreductionofS02tosulfurelement.Tllisnotonlyavoidssecondarypollution,butalsoob
5、tainssulfurwhichisvaluableresource.Inthecoal-firedprocess,incompletecombustionwillproducehazardousCO.IfusingCOasreducingagent,whileitremovess02,italsoreducesCOpollution.Butintheprocessofgascatalyticreduction,thereactiontemperatureishigh,andthecatalystdeactiv
6、ationiseasytohappen.Sointhisarticlewestudiedthedesulfurizationcatalystintermsofthecarrierandthepreparation.Thefollowingarethemainconclusions:1.ItWasstudiedOVertheimpactofpreparationconditionsofcolloidalglucosecarbonspheresonthepropertiesofaluminaearlier.Andi
7、twasconcludedthatthehydrothermalsynthesizingtemperatureandtimeofcolloidalcarbonspheres,thewashingaftersynthesishadlagerimpactonthecarderproperties.Thecolloidalcarbonballwith180"12temperatureand6hreactiontimewereselectedastemplate.Throughorthogonalexperimentt
8、ooptimizethepreparationconditionsandthetestsonsurfacearea,porestructure,XRD,andSEMofthecarrier,wegotthehollowmicro—spheresofalumina丽nlhoneycombstructurecarrierwithlargersurfacearea,twostructurep
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