- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | FANG Ming, WANG Wei, ZHOU Zhengyu, YANG Bing, FAN Ximei. Experimental Study on Emission Law of VOCs from Non-metallic Materials for Railway Passenger Trains[J]. Journal of Southwest Jiaotong University, 2024, 59(1): 87-93, 112. doi: 10.3969/j.issn.0258-2724.20220294
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In order to study the effect of the temperature on the emission of volatile organic compounds (VOCs) from typical non-metallic materials (heavy anti-corrosion coatings, floor covering, and glassfiber reinforced plastics) for railway passenger trains, tests were carried out to analyze the emission law of VOCs based on multi-gas-solid ratio method and data fitting method. First, the concentrations of VOCs under four different gas-solid ratios were measured, and key parameters (initial emittable concentration and diffusion coefficient) influencing the emission of VOCs were obtained. Then, with the help of vehicle manufacturing technology and application scenarios, the effect of different temperatures on the emission law of VOCs was studied. The results show that the physical and chemical properties of the materials and the temperature greatly affect the emission of VOCs. When the temperature rises from 16 to 55 ℃, the concentrations of benzene compounds and aldehydes decrease; the initial emittable concentration of heavy anti-corrosion coatings is decreased to 1.8%, and its diffusion coefficient is decreased. At the same time, the initial emittable concentrations of both floor covering and glassfiber reinforced plastics are decreased to less than 0.3%; the diffusion coefficient of floor covering is increased, while that of glassfiber reinforced plastics is decreased. Benzene compounds are the main components of VOCs, in which the styrene accounts for the largest proportion, and the ranking rule of toluene, ethylbenzene, and xylene is not obvious. Meanwhile, the benzene is not detected in the test. In the baking process of railway trains for environmental protection, it is suggested that the baking temperature of heavy anti-corrosion coatings should not be less than 55 ℃, and that of floor covering and glassfiber reinforced plastics should not be less than 45 ℃.
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