低温环境下路面喷涂纳米TiO2降解汽车尾气效能的试验研究

-10 %：时，在0 ~40 min时间内各有害气体浓度降低速率均较大，在60 min时，气体HC的平均浓度稳定在23.7 ppm,C0的平
均浓度稳定在0.13% ,N0的平均浓度稳定0 ppmo在相同的试验条件下，低温和常温环境，有害气体浓度曲线变化规律具有
一致性，反应仓中HC、CO、NO的浓度均随时间增长逐渐下降，说明低温环境不影响光催化反应的进行，但低温对降解速率有
YANG Yang1* , LIU Haiping1, QIAN Guoping2, WU He1, WANG Guofeng1
(1. College of Civil and Architectural Engineering, Heilongjiang Institute of Technology, Harbin 150050； 2. School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114)
Abstract ：In order to explore the degradation efficiency of automobile exhaust by nano - TiO2 spraying on pavement in low temper­ ature environment and simulate low temperature environment, indoor degradation test of automobile exhaust was designed to observe the degradation efficiency of harmful gases ( CO, HC, NO) . The nano - sized TiO2 slurry was sprayed on the surface of rutting specimens, put into a self - made closed low - temperature test chamber, put into the automobile exhaust, and when the initial concentration was set, the imitation solar lamp was turned on, and the exhaust gas analyzer suction device was turned on every 10 minutes for 6 seconds to record the corresponding gas concentration. The results show that the decreasing rate of harmful gas concentration is larger in 0 - 40 min at - 10 C. At 60 min, the average concentration of HC, CO and NO is stable at 23. 7 ppm, 0.13% and 0 ppm respectively. Un­ der the same experimental conditions, the concentration curve of harmful gases is consistent at low and normal temperatures. The concen­ tration of HC, CO and NO in the reactor decreases gradually with the increase of time, which indicates that the low temperature environ­ ment does not affect the photocatalytic reaction, but the low temperature has some effect on the degradation rate. Nano -TiO2 can degrade NO in automobile exhaust effectively. It is 100% higher than HC and CO, reflecting that nano - TiO2 material has the best degradation effect on NO gas. At a low temperature of -10 °C, the average degradation rate of NO is higher than the temperature of 20 °C, indica­ ting that the temperature has no effect on the degradation efficiency of NO, but has a certain effect on the degradation rate of N0・
一定的影响；纳米Tit)?对汽车尾气中的NO气体降解效能可达100% ,明显高于HC和CO,反映出纳米材料对NO气体
降解效果最佳。在低温-10咒时,NO的平均降解速率高于常温20咒时，说明试验时温度对NO降解效能没有影响，但对NO 降解速率有一定的影响。
关键词:低温;路面;喷涂;TiO2；降解;汽车尾气
中图分类号:U414；U416.2
文献标识码:A
文章编号：1006 - 8023(2019)06 - 0072 - 05
Experimental Study on Degradation Efficiency of Automotive Exhaust by Nano - TiO2 Spraying on Pavement in Low Temperature Environment
第35卷第6期 2019年11月
森林工程 FOREST ENGINEERING
Vol. 35 No. 6 Nov. ,2019
低温环境下路面喷涂纳米TiO2降解 汽车尾气效能的试验研究
杨扬"，刘海苹1，钱国平彳，武鹤1，王国峰1
（1.黑龙江工程学院土木与建筑工程学院,哈尔滨150050； 2.长沙理工大学交通运输工程学院，长沙410114）
摘要:为探究低温环境下路面喷涂纳米TiOz降解汽车尾气效能，模拟低温环境,设计汽车尾气室内降解试验，观察有害
气体(CO、HC、NO)的降解效能。将纳米TiO2浆料喷涂至车辙试件表面，放入自制密闭的低温试验仓,通入汽车尾气，达到设
定的初始浓度时，开启仿太阳光灯，每隔10 min开启尾气分析仪吸气装置6 s,记录对应的气体浓度。试验结果表明：温度为