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新型管状光催化反应器降解VOCs特性

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刘鹏, 郑洁, 周亚亚, 周雪梅. 新型管状光催化反应器降解VOCs特性[J]. 环境工程学报, 2018, 12(7): 2010-2017. doi: 10.12030/j.cjee.201712118
引用本文: 刘鹏, 郑洁, 周亚亚, 周雪梅. 新型管状光催化反应器降解VOCs特性[J]. 环境工程学报, 2018, 12(7): 2010-2017. doi: 10.12030/j.cjee.201712118
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LIU Peng, ZHENG Jie, ZHOU Yaya, ZHOU Xuemei. Removal performance of VOCs with novel annular air purifier[J]. Chinese Journal of Environmental Engineering, 2018, 12(7): 2010-2017. doi: 10.12030/j.cjee.201712118
Citation: LIU Peng, ZHENG Jie, ZHOU Yaya, ZHOU Xuemei. Removal performance of VOCs with novel annular air purifier[J]. Chinese Journal of Environmental Engineering, 2018, 12(7): 2010-2017. doi: 10.12030/j.cjee.201712118
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新型管状光催化反应器降解VOCs特性

  • 1.

    贵州大学土木工程学院， 贵阳 550025

  • 2.

    重庆大学三峡库区生态环境教育部重点实验室， 重庆 400045

  • 3.

    贵州财经大学高等教育研究与评估中心, 贵阳 550025

  • 基金项目:

    国家自然科学基金资助项目（51478058）

    贵州省科技计划项目(黔科合LH字[2017]7242号)

    贵州大学2017年度学术新苗培养及创新探索专项（黔科合平台人才[2017]5788）

    贵州省土木工程一流学科建设项目（2017000006）

    贵州大学引进人才科研项目(贵大人基合字[2015]22号)

Removal performance of VOCs with novel annular air purifier

  • 1.

    College of Civil Engineering, Guizhou University, Guiyang 550025, China

  • 2.

    Key Laboratory of Three Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China

  • 3.

    Center of Higher Education Research and Evaluation, Guizhou University of Finance and Economics, Guiyang 550025, China

  • Fund Project:

  • 摘要: 以一种新型折流式管状光催化反应器为研究对象，选择甲醛、苯和甲苯为目标污染物，以紫外光源、催化剂负载量和反应器内循环流量为关键影响因素，利用非密闭型环境舱，分析了反应器降解室内VOCs特性。结果表明，在254 nm和365 nm紫外光源照射下，VOCs的总衰减系数随初始浓度的增加而增大，且254 nm紫外光源照射下的总衰减系数更大。365 nm紫外光源照射时，VOCs的反应有效度随催化剂负载量的增加而增大；254 nm紫外光源照射时，反应有效度受催化剂负载量变化的影响很小。VOCs的转化率随循环流量的增加而增大，而反应速率受循环流量的影响较小；相同的循环流量下，转化率和反应速率均随着VOCs初始浓度增加而增大。由于增设肋片，折流式管状反应器比传统无肋片管状反应器的洁净空气量提升60%，且反应有效度更接近0.5，说明前者的传质-反应速率更加匹配，降解性能明显更优。
    Abstract: A novel baffled annular air purifier coated with TiO2 was designed. Formaldehyde, benzene and toluene were chosen as the target pollutants. The key influence factors including the catalysts loading, the light intensity and the flow rate were studied. The kinetic characteristics of the reactor were analyzed using an environmental chamber. The total degradation coefficients increased as the initial concentration of VOCs increased, whenever using the 254 nm germicidal lamp or the 365 nm black-light lamp. And the total degradation coefficients under the irradiation of germicidal lamp were higher. Under the irradiation of black-light lamp, the reaction effectiveness was obviously improved as the catalysts loading increased. Under the irradiation of germicidal lamp, the reaction effectiveness had no obvious change with the increase of catalysts loading. The removal efficiency increased with the increase of air flow rate, but the reaction rate had no obvious change with the increase of air flow rate. It was also found that both the removal efficiency and reaction rate was improved as the initial concentration of VOCs increased. In addition, the clean air delivery rate was obviously improved by adding fins to the reactor. Using fins made the mass transfer rate increased to match the reaction rate.
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  • 刊出日期:  2018-07-26

新型管状光催化反应器降解VOCs特性

  • 1. 贵州大学土木工程学院， 贵阳 550025
  • 2. 重庆大学三峡库区生态环境教育部重点实验室， 重庆 400045
  • 3. 贵州财经大学高等教育研究与评估中心, 贵阳 550025
基金项目:

国家自然科学基金资助项目（51478058）

贵州省科技计划项目(黔科合LH字[2017]7242号)

贵州大学2017年度学术新苗培养及创新探索专项（黔科合平台人才[2017]5788）

贵州省土木工程一流学科建设项目（2017000006）

贵州大学引进人才科研项目(贵大人基合字[2015]22号)

摘要: 以一种新型折流式管状光催化反应器为研究对象，选择甲醛、苯和甲苯为目标污染物，以紫外光源、催化剂负载量和反应器内循环流量为关键影响因素，利用非密闭型环境舱，分析了反应器降解室内VOCs特性。结果表明，在254 nm和365 nm紫外光源照射下，VOCs的总衰减系数随初始浓度的增加而增大，且254 nm紫外光源照射下的总衰减系数更大。365 nm紫外光源照射时，VOCs的反应有效度随催化剂负载量的增加而增大；254 nm紫外光源照射时，反应有效度受催化剂负载量变化的影响很小。VOCs的转化率随循环流量的增加而增大，而反应速率受循环流量的影响较小；相同的循环流量下，转化率和反应速率均随着VOCs初始浓度增加而增大。由于增设肋片，折流式管状反应器比传统无肋片管状反应器的洁净空气量提升60%，且反应有效度更接近0.5，说明前者的传质-反应速率更加匹配，降解性能明显更优。

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