基于复合纳米光催化材料的隧道尾气降解研究
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摘要
将复合光催化材料TiO_2-CeO_2应用于隧道钢渣沥青混合料中,研究复合光催化材料TiO_2-CeO_2对隧道内汽车尾气的降解效能.首先研发了一套能模拟隧道环境的尾气降解试验装置,然后研究了复合光催化材料TiO_2-CeO_2对隧道钢渣沥青混合料路用性能的影响,最后通过降解效能与降解速率的评价得出了复合光催化材料TiO_2-CeO_2在隧道钢渣沥青混合料中的最佳用量.结果表明:将复合纳米光催化材料应用于隧道钢渣沥青混合料中,在纳米TiO_2的掺量为50%、纳米CeO_2掺量为0.7%时会达到光催化效率、光催化效能的峰值,该掺量下对NO和HC的降解效率峰值高达89%和95%,30 min内降解速率分别高达626.3 mg/(m~3·min)和74.75 mg/(m~3·min),且隧道钢渣沥青混合料的路用性能符合要求.
The composite photocatalytic material TiO_2-CeO_2 was incorporated to steel slag asphalt mixture in tunnel environment in order to study its efficiency for exhaust gas degradation.Firstly,a complete set of tail gas degradation test equipment capable of simulating tunnel environment was developed.Then the influence of composite photocatalytic material TiO_2-CeO_2 on the performance of steel slag asphalt mixture in asphalt pavement was studied.Finally,the optimum doping ratio of TiO_2-CeO_2 composite photocatalytic material was also studied.The results show that when the nano-TiO_2volume is 50% and nano-CeO_2 is 0.7%,the photocatalytic efficiency will reach to the peak value.In this case,the degradation efficiency peak of NO and HC is 89% and 95%,respectively,and exhaust degradation efficiency reach up to 626.3 mg/(m~3· min) and 74.75 mg/(m~3·min) within 30 min,respectively.The road performance of tunnel steel slag asphalt mixture meets the requirements.
The composite photocatalytic material TiO_2-CeO_2 was incorporated to steel slag asphalt mixture in tunnel environment in order to study its efficiency for exhaust gas degradation.Firstly,a complete set of tail gas degradation test equipment capable of simulating tunnel environment was developed.Then the influence of composite photocatalytic material TiO_2-CeO_2 on the performance of steel slag asphalt mixture in asphalt pavement was studied.Finally,the optimum doping ratio of TiO_2-CeO_2 composite photocatalytic material was also studied.The results show that when the nano-TiO_2volume is 50% and nano-CeO_2 is 0.7%,the photocatalytic efficiency will reach to the peak value.In this case,the degradation efficiency peak of NO and HC is 89% and 95%,respectively,and exhaust degradation efficiency reach up to 626.3 mg/(m~3· min) and 74.75 mg/(m~3·min) within 30 min,respectively.The road performance of tunnel steel slag asphalt mixture meets the requirements.
引文
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[16] 谭忆秋,李洛克,魏鹏,等.可降解汽车尾气材料在沥青路面中的应用性能评价 [J].中国公路学报,2010,23(6):21- 27.TAN Yi-qiu,LI Luo-ke,WEI Peng,et al.Application performance evaluation of degradable automobile exhaust materials in asphalt pavement [J].China Journal of Highway and Transport,2010,23(6):21- 27.
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[2] MOJTABA Nasr-Esfahani,SAHAR Fekri.Al-umina/TiO2/hydroxyapatite interface nanostructure composite filters as efficient photocatalysts for the purification of air [J].Reaction Kinetics Mechanisms & Catalysis,2012,107(1):89- 103.
[3] FAN Xiao-fen,LIU Jie-min.Graphene-supported CoPc/TiO2 synthesized by sol-gel-hydrothermal method with enhanced photocatalytic activity for degradation of the typical gas of landfill exhaust [J].Journal of the Air & Waste Management Association,2015,65(1):50- 58.
[4] 王彤.长大型隧道用多功能纳米涂料制备与性能研究 [D].南京:南京林业大学,2017.
[5] CHEN Meng,LIU Yan-hua .NOx removal from vehicle emissions by functionality surface of asphalt road [J].Journal of Hazardous Materials,2010,174(1/2/3):375- 379.
[6] 李博.纳米二氧化钛涂层沥青路面降解汽车尾气应用效果研究 [D].长沙:湖南科技大学,2017.
[7] 方博文.基于沥青路面载体吸附并降解隧道汽车尾气技术研究 [D].南京:南京林业大学,2016.
[8] 李宏,李燕群.TiO2光催化氧化技术在废水处理中的应用 [J].城市建设理论研究,2014,14(8):66- 68.LI Hong,LI Yan-qun.Application of TiO2 photocatalytic oxidation technology in wastewater treatment [J].City Construction Theory Research,2014,14(8):66- 68.
[9] 耿九光,李毅,张晨旭.纳米CeO2基光催化材料的尾气降解效能及最佳掺量 [J].公路交通科技,2014,31(4):153- 158.GENG Jiu-guang,LI Yi,ZHANG Chen-xu.Degradation efficiency and optimum addition of Nano-CeO2 based photocatalytic materials [J].Journal of Highway and Transportation Research and Development,2014.31(4):153- 158.
[10] 徐志军,初瑞清.纳米材料与纳米技术 [M].北京:化学工业出版社,2010:15- 32.
[11] 陈萌,刘艳华,韩相春,等.沥青光催化路面净化机动车排放NO反应动力学研究 [J].武汉理工大学学报,2013,35(8):128- 133.CHEN Meng,LIU Yan-hua,HAN Xiang-chun,et al.Study on NO reaction kinetics of asphalt photocatalytic pavement purification of vehicle emissions [J].Journal of Wuhan University of Technology,2013,35(8):128- 133.
[12] 魏鹏.可降解汽车尾气的沥青混合料路面研究 [D].哈尔滨:哈尔滨工业大学,2008.
[13] 马春磊.纳米TiO2对汽车尾气中NOx的净化效果与测试研究 [D].哈尔滨:东北林业大学,2008.
[14] 雷雨滋.降解汽车尾气与缓减城市热岛效应的沥青混合料研究 [D].西安:长安大学,2014.
[15] 谢杰光,匡亚川.纳米TiO2光催化技术及其在降解汽车尾气中的应用 [J].材料导报,2012,26(15):141- 145.XIE Jie-guang,YAN Ya-chuan.Nano-TiO2 photocatalysis technology and its application in degradation of automobile exhaust gas [J].Materials Re-view,2012,26(15):141- 145
[16] 谭忆秋,李洛克,魏鹏,等.可降解汽车尾气材料在沥青路面中的应用性能评价 [J].中国公路学报,2010,23(6):21- 27.TAN Yi-qiu,LI Luo-ke,WEI Peng,et al.Application performance evaluation of degradable automobile exhaust materials in asphalt pavement [J].China Journal of Highway and Transport,2010,23(6):21- 27.
[17] 赵洺.沥青路面TiO2降解汽车尾气(NOx)监测与效果评价研究 [D].哈尔滨:东北林业大学,2013.