TiO2光催化净化城市隧道中NOx的行为及经济性

摘要
图/表
参考文献(25)
相关文章 (15)

全文: PDF (617 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要

考察了TiO₂光催化降解模拟城市隧道尾气中NO_x的催化行为，并以一个长度为1km和高度为5m的双向两车道城市隧道为研究对象，分析了其应用的经济性.结果表明，煅烧温度为400℃制备的TiO₂-400催化剂的NO吸附性能和光催化性能最佳，NO_x最大转化率为30%.不同的气体组成会显著影响光催化剂对NO_x的吸附和光催化性能，其中对于NO竞争性吸附抑制效应的影响为CH₄≈CO₂>CO，而对于光催化性能的促进效应影响为CO > CH₄ > CO₂.增大紫外光辐照度可提高光催化活性，但降低了催化剂的稳定性.紫外光辐照度为6.4μW/cm²为合适的光照强度.增加催化剂的用量可显著增强NO的吸附性能和光降解NO_x的稳定性.当催化剂用量为15mg/cm²时，NO吸附容量为0.88mg/g，催化剂的稳定时间可达110min.通过简要分析该技术的经济性，表明光催化降解城市隧道NO_x的成本较低，具有良好的经济性.

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	潘华
	陈雪松
	王莉
	梅瑜
	徐冬梅

关键词 ：二氧化钛, 光催化, 城市隧道, 脱硝, 经济性

Abstract：

Photocatalytic behavior of NO removal on TiO₂ was carried out in the simulated urban tunnel exhaust. The economy of its application was analyzed for an urban tunnel with length of 1km and height of 5m. TiO₂ calcined at 400℃ (TiO₂-400) showed the best adsorption and photocatalytic performance among the samples. The maximum NO_x conversion of 30% was obtained on TiO₂-400. NO_x adsorption and photocatalytic performance was significantly influenced by various feeding gases. The inhibition of NO_x adsorption decreased in the order of CH₄≈CO₂ > CO. The promotion of removal efficiency of NO_x was ranked as CO > CH₄ > CO₂. When the light irradiance increased, the photocatalytic activity and stability of catalyst were enhanced and decreased, respectively. Light irradiance of 6.4ugW/cm² is the appropriate illumination intensity for photocatalysis of DeNO_x. Both NO adsorption capacity and lifetime of catalyst were significantly promoted with the increase of catalyst usage. When catalyst dosage was 15mg/cm², the adsorption capacity of NO was 0.88mg/g, and the stabilization time of the catalyst was 110min. This technology has characteristics with low cost and good economy.

Key words： TiO₂ photocatalysis urban tunnel DeNO_x economy

收稿日期: 2018-06-04

PACS:

X511

基金资助:

浙江省自然科学基金资助项目（LY19E080023）；浙江树人大学中青年学术团队项目（XKJ0516205）；浙江树人大学科研启动基金资助项目（KXJ0517102）.

通讯作者: 徐冬梅,教授,dm25xu@163.com E-mail: dm25xu@163.com

作者简介: 潘华(1980-),男,浙江衢州人,副教授,博士,主要从事大气污染控制技术和环境催化的研究.发表论文40余篇.

引用本文:

潘华, 陈雪松, 王莉, 梅瑜, 徐冬梅. TiO₂光催化净化城市隧道中NO_x的行为及经济性[J]. 中国环境科学, 2019, 39(1): 118-125. PAN Hua, CHEN Xue-song, WANG Li, MEI Yu, XU Dong-mei. Photocatalytic performance and economy of de-NO_x in urban tunnel exhaust by TiO₂. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(1): 118-125.

链接本文:

http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2019/V39/I1/118

[1]	中华人民共和国交通运输部.2017年交通运输行业发展统计公报[R]. 2018. Ministry of Transport of the People's Republic of China. Statistical bulletin on transportation industry development in 2017[R]. 2018.
[2]	肖益民,盘晓红,张锦鹏.连续公路隧道空气污染物窜流影响的模型试验系统设计[J]. 中国公路学报, 2015,28(11):90-97. Xiao Y M, Pan X H, Zhang J P. Model test system design of channeling effects of air pollutants in continuous road tunnels[J]. China Journal of Highway and Transport, 2015,28(11):90-97.
[3]	王伯光,吕万明,周炎,等.城市隧道汽车尾气中多环芳烃排放特征的研究[J]. 中国环境科学, 2007,27(4):482-487. Wang B G, Lǚ W M, Zhou Y, et al. Emission characteristic of PAHs composition in motor vehicles exhaust of city tunnel[J]. China Environmental Science, 2007,27(4):482-487.
[4]	王成辉,闫琨,韩新宇,等.高原城市昆明公路隧道大气中PM2.5理化特征分析[J]. 环境科学, 2017,38(12):4968-4975. Wang C H, Yan K, Han X Y, et al. Physico-chemical characteristic analysis of PM2.5 in the highway tunnel in the Plateau City of Kunming[J]. Environmental Science, 2017,38(12):4968-4975.
[5]	位楠楠,刘卫,肖德涛,等.隧道大气细颗粒物及其元素的粒径分布特征[J]. 环境科学研究, 2011,24(5):475-481. Wei N N, Liu W, Xiao D T, et al. Size distribution characteristics and elemental composition of airborne fine particles inside a tunnel[J]. Research of Environmental Sciences, 2011,24(5):475-481.
[6]	Kristensson A, Johansson C, Westerholm R, et al. Real-world traffic emission factors of gases and particles measured in a road tunnel in Stockholm, Sweden[J]. Atmospheric Environment, 2004,38(5):657-673.
[7]	Indrehus O, Vassbotn P. CO and NO2 pollution in a long two-way traffic road tunnel:investigation of NO2/NOx ratio and modelling of NO2 concentration[J]. Journal of Environmental Monitoring, 2001, 3(2):221-225.
[8]	窦鸿文,明廷臻,许杰,等.城市立体交通系统中污染物传播特性数值模拟[J]. 中国环境科学, 2018,38(1):51-58. Dou H W, Ming T Z, Xu J, et al. Numerical simulation of pollutant propagation characteristics in a three-dimensional urban traffic system[J]. China Environmental Science, 2018,38(1):51-58.
[9]	黄青,宋韬,王伯光,等.城市隧道源排放清单建立方法[J]. 中国环境科学, 2018,38(8):2898-2902. Huang Q, Song T, Wang B T, et al. Method to establish the emission inventory for urban tunnel source[J]. China Environmental Science, 2018,38(8):2898-2902.
[10]	中国环境科学研究院.环境空气质量标准[M]. 北京:中国环境科学出版社, 2012:71. Chinese Research Academy of Environmental Sciences. Ambient air quality standard[M]. Beijing:China Environmental Science Press, 2012:71.
[11]	Guerrini G L. Photocatalytic performances in a city tunnel in Rome:NOx monitoring results[J]. Construction and Building Materials, 2012,27:165-175.
[12]	Hunger M, Hüsken G, Brouwers H J H. Photocatalytic degradation of air pollutants-From modeling to large scale application[J]. Cement and Concrete Research, 2010,40(2):313-320.
[13]	Maggos T, Plassais A, Bartzis J, et al. Photocatalytic degradation of NOx in a pilot street canyon configuration using TiO2-mortar panels[J]. Environmental Monitoring and Assessment, 2008,136:35-44.
[14]	Lasek J, Yu Y, Wu J C S. Removal of NOx by photocatalytic processes[J]. Journal of Photochemistry and Photobiology C:Photochemistry Reviews, 2013,14:29-52.
[15]	王元瑞.以TiO2为基质复合氧化物功能材料的合成及应用研究[D]. 吉林大学, 2013. Wang Y R. Synthesis and application of TiO2 based composite oxides[D]. Jilin University, 2013.
[16]	刘文芳,周汝利,王燕子.光催化剂TiO2改性的研究进展[J]. 化工进展, 2016,35(8):2446-2454. Liu W F, Zhou R L, Wang Y Z. Research progress on modification of TiO2 photocatalyst[J]. Chemical Industry and Engineering Progress, 2016,35(8):2446-2454.
[17]	汪成建.TiO2晶型控制及复合光催化剂性能研究[D]. 天津:天津大学, 2003. Wang C J. Study on crystal form control of TiO2 and properties of composite photocatalysts[D]. Tianjin:Tianjin University, 2003.
[18]	Roy S, Aarthi T, Hegde M S, et al. Kinetics of photocatalytic reduction of NO by CO with Pd2+-ion-substituted nano-TiO2[J]. Industrial & Engineering Chemistry Research, 2007,46(17):5798-5802.
[19]	Roy S, Hegde M S, Ravishankar N, et al. Creation of redox adsorption sites by Pd2+ ion substitution in nano TiO2 for high photocatalytic activity of CO oxidation, NO reduction, and NO decomposition[J]. Journal of Physical Chemistry C, 2007,111(23):8153-8160.
[20]	Bowering N, Croston D, Harrison P G, et al. Silver modified degussa P25 for the photocatalytic removal of nitric oxide[J]. International Journal of Photoenergy, 2007,(2007):1-8.
[21]	Bowering N, Walker G S, Harrison P G, Photocatalytic decomposition and reduction reactions of nitric oxide over Degussa P25[J]. Applied Catalysis B:Environmental, 2006,62(3/4):208-216.
[22]	Mikhaylov R V, Lisachenko A A, Shelimov B N, et al. FTIR and TPD analysis of surface species on a TiO2 photocatalyst exposed to NO, CO, and NO-CO mixtures:Effect of UV-vis light irradiation[J]. Journal of Physical Chemistry C, 2009,113(47):20381-20387.
[23]	Wu Y T, Yu Y H, Nguyen V H, et al. In-situ FTIR spectroscopic study of the mechanism of photocatalytic reduction of NO with methane over Pt/TiO2 photocatalysts[J]. Research on Chemical Intermediates, 2015,41:2153-2164.
[24]	Manzanares M, Fàbrega C, Ossó J O, et al. Engineering the TiO2, outermost layers using magnesium for carbon dioxide photoreduction[J]. Applied Catalysis B, 2014,150-151(18):57-62.
[25]	Choi K M, Kim D, Rungtaweevoranit B, et al. Plasmon-enhanced photocatalytic CO2 conversion within metal-organic frameworks under visible light[J]. Journal of America Chemistry Society, 2017,139(1):356-362.