| Author Name | Affiliation | | Ge Zhang | School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China | | Yan Li | School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China | | Jiao Bai | School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China | | Qunli Zhang | Beijing Key Lab of Heating, Gas Supply, Ventilating and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
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| Abstract: |
| The purpose of this study is to investigate the practical performance of passive thermal catalysis for indoor formaldehyde. A heating plate coated with noble metal catalyst Pt/TiO2 was made to simulate the radiators with a passive thermal catalysis function. The formaldehyde degradation rate in the presence of the simulated radiator was measured in a stainless-steel chamber under controlled temperature and compared with that in the presence of catalyst powder. The influence of temperature and the concentration of formaldehyde on the degradation performance was measured thoroughly and fitted in the polynomial form. It was found that the degradation capability of the coated catalyst dropped from that of the catalyst power, and the degradation capability trends of both materials in various temperatures were different. The clean air delivery rate (CADR) was found to be merely the function of temperature and irrelevant to indoor formaldehyde concentration in the investigated range. |
| Key words: formaldehyde Pt/TiO2 degradation passive thermal catalysis CADR |
| DOI：10.11916/j.issn.1005-9113.18004 |
| Clc Number:X511 |
| Document Code::A |
| Fund: |
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| Descriptions in Chinese: |
| 室内甲醛被动热催化的实际性能 张 舸1，李 妍1，白 娇1，张群立2，刘 靖3 （1.北京科技大学 土木与资源工程学院，北京 100083；2.北京建筑大学 北京市“供热、供燃气、通风及空调工程”重点实验室，北京 100044; 3.河南理工大学 土木工程学院， 河南 焦作 454000） 创新点说明：创新地提出被动式热催化净化室内甲醛的方法，利用散热器散热助力热催化反应，并搭建试验台进行验证。 研究目的： 研究被动热催化室内甲醛的实际性能。 研究方法： 1)实验研究，制备涂有贵金属催化剂Pt/TiO2的加热板，以模拟具有被动热催化功能的散热器。在受控温度下的不锈钢室中测量模拟散热器存在下的甲醛降解速率，并与在催化剂粉末存在下的甲醛降解速率进行比较。所使用的主要设备包括：气相色谱仪，氢空一体机等。 2)数据分析，温度和甲醛浓度对降解性能的影响进行了测量并以多项式的形式拟合。得到自变量内任意温度和甲醛浓度下，甲醛降解量的取值。 研究结果： 根据实验结果，在25～90 ℃下，甲醛的净化率随温度升高而增大。粉末状甲醛的净化率比被动式热催化的净化率要大。 结论： 1)在基于实验数据的分析中，ISO标准的10至50倍的甲醛浓度可以降低至接近允许极限； 2)发现涂层催化剂性能略差于催化剂粉末，结果差异可归因于辐射器引起的自然对流的传质能力； 3)发现清洁空气输送速率（CADR）仅仅是温度的函数，与研究范围内的室内甲醛浓度无关。 关键词：甲醛;Pt/TiO₂;降解;被动热催化;CADR |
