吸附光催化法用于降解室内VOC的研究进展
- 环保小兵 王续
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2020-03-16 12:30:04
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2016年第35卷第7期CHEMICALINDUSTRYANDENGINEERINGPROGRESS·2215·化工进展吸附-光催化法用于降解室内VOC的研究进展方选政1,张兴惠2,张兴芳1(1太原理工大学化学化工学院,山西太原030024;2太原理工大学环境科学与工程学院,山西太原030024)摘要:吸附-光催化法因其高效、便捷、无污染等特点,在室内挥发性有机物(VOC)治理领域拥有着广阔的应用前景。本文介绍了吸附-光催化降解VOC机理;总结了近年来常用的固定化TiO2的制备方法,以及各自的工艺流程、适用范围和存在的问题;综述了反应环境(风速、初始浓度、温度、相对湿度)对吸附-光催化降解率的影响。分析表明,在选择TiO2固定化工艺时,应当根据吸附剂基材的表面基团、孔隙结构和亲疏水性等特征合理经济地确定制备方法;在探讨反应环境对室内VOC降解率的影响规律时,应综合考虑VOC自身特性和反应器类型等实验条件以得到不同条件下的最佳环境参数。最后指出,低温成膜的制备方法以及对反应环境如何影响低浓度多组分VOC降解的研究将成为今后的发展趋势。关键词:吸附;催化剂;降解;室内挥发性有机物;固定化;反应环境中图分类号:X511文献标志码:A文章编号:1000–6613(2016)07–2215–07DOI:10.16085/j.issn.1000-6613.2016.07.039ResearchprogressondegradationofindoorVOCbyusingadsorption-photocatalyticmethodFANGXuanzheng1,ZHANGXinghui2,ZHANGXingfang1(1InstituteofChemistryandChemicalEngineering,TaiyuanUniversityofTechnology,Taiyuan030024,Shanxi,China;2InstituteofEnvironmentalScienceandEngineering,TaiyuanUniversityofTechnology,Taiyuan030024,Shanxi,China)Abstract:Adsorption-photocatalyticmethodhasabroadapplicationprospectinthefieldofindoorVOCcontrolduetoitshighefficiency,convenience,non-pollution,etc.Inthispaper,adsorption-photocatalyticdegradationmechanismofVOCisintroduced.CommonlyusedpreparationmethodsofimmobilizedTiO2inrecentyears,aswellaseachtechnologicalprocess,applicationscopeandexistingproblemsaresummarized.Meanwhile,theinfluencesofreactionenvironment(windvelocity,initialconcentration,temperature,relativehumidity)onadsorption-photocatalyticdegradationratearereviewed.Analysisshowsthatoneshouldreasonablyandeconomicallydeterminepreparationmethodaccordingtoadsorbentsubstrate’ssurfacegroups,porestructureandhydrophilic-hydrophobicpropertywhenchoosingTiO2immobilizationtechnology,comprehensivelyconsiderself-characteristicsofVOC,reactortypeandotherexperimentalconditionstogetthebestenvironmentalparametersunderdifferentconditionswhendiscussingtheinfluencelawofreactionenvironmentondegradationrateofindoorVOC.Finally,itispointedoutthatlow-temperaturemembranepreparationmethodsandstudiesonhowreactionenvironmentaffectsVOCdeg
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