_活性炭复合材料负载催化剂催化臭氧氧化处理石化废水
- 张立中
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2020-04-22 18:18:58
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·152·化工环保ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY2018年第38卷第2期活性炭复合材料负载催化剂催化臭氧氧化处理石化废水赵越,蒋广安,李宝忠,马传军,王雪清(中国石油化工股份有限公司抚顺石油化工研究院,辽宁抚顺113001)[摘要]采用催化臭氧氧化深度处理某石化厂炼油废水,制备了活性炭复合材料负载催化剂(Fe2O3/ACNT),与几种常见负载催化剂进行了物性和COD去除效果的对比,并对Fe2O3/ACNT的催化效果和稳定性进行了详细分析。结果表明:催化剂的催化臭氧氧化活性由高到低的顺序为Fe2O3/ACNT>Fe2O3/活性炭>Fe2O3/Al2O3>Fe2O3/陶粒;Fe2O3/ACNT催化剂具有较高的比表面积、孔体积、强度和吸水率,使COD去除率由单独臭氧氧化时的约20%提高到66.8%。在催化剂填充量200mL、废水pH7.6、臭氧投加量200mg/L、体积空速1h-1的条件下运行30d,COD去除率平均达65.1%,出水COD均值为40.8mg/L,最高值为44.3mg/L,满足外排水COD小于50mg/L的指标。催化剂稳定性良好,运行30d活性未见明显降低,具有在环保领域应用的前景。[关键词]催化臭氧氧化;石化废水;活性炭;复合催化剂[中图分类号]X703[文献标志码]A[文章编号]1006-1878(2018)02-0152-05[DOI]10.3969/j.issn.1006-1878.2018.02.005TreatmentofpetrochemicalwastewaterbycatalyticozoneoxidationwithactivatedcarboncompositesupportedcatalystsZhaoYue,JiangGuangan,LiBaozhong,MaChuanjun,WangXueqing(SinopecFushunResearchInstituteofPetroleumandPetrochemicals,FushunLiaoning113001,China)Abstract:Thepetrochemicalwastewaterwastreatedbycatalyticozoneoxidation.Theactivatedcarbon(AC)compositesupportedcatalyst(Fe2O3/ACNT)waspreparedandcomparedwithseveralcommonsupportedcatalystsonphysicalpropertiesandCODremovaleffect.ThecatalyticeffectsandstabilityofFe2O3/ACNTwereanalyzed.Theresultsshowedthat:TheorderofcatalyticozoneoxidationactivityofthecatalystswasFe2O3/ACNT>Fe2O3/AC>Fe2O3/Al2O3>Fe2O3/ceramic;Becauseofthehigherspecificarea,porevolume,strengthandwaterabsorption,Fe2O3/ACNTcouldincreasetheCODremovalratefromabout20%ofozoneoxidationaloneto66.8%;Undertheconditionsofcatalystloading200mL,wastewaterpH7.6,ozoneamount200mg/L,spacevelocity1h-1andrunningtime30d,theaverageCODremovalratewas65.1%,theaverageeffluentCODwas40.8mg/Landthehighestvaluewas44.3mg/L,whichmetthedrainagestandard(COD≤50mg/L).Thecatalysthadgoodstabilitywithoutsignificantactivityreductionin30dofoperation,whichshowedafavorableapplicationprospectinenvironmentalprotection.Keywords:catalyticozoneoxidation;petrochemicalwastewater;activatedcarbon;compositecatalyst[收稿日期]2017-08-04;[修订日期]2017-12-27。[作者简介]赵越(1983—),男,辽宁省朝阳市人,博士,工程师,
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