An in‐situ thermally regenerated air purifier for indoor formaldehyde removal
An in‐situ thermally regenerated air purifier for indoor formaldehyde removal
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DOI：
10.1111/ina.12441
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发表时间：
2018-03
期刊：
影响因子：
5.8
通讯作者：
Ru Xiao;J. Mo;Yan Zhang;D. Gao
中科院分区：
文献类型：
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作者：
Ru Xiao;J. Mo;Yan Zhang;D. Gao
甲醛是一种常见的室内污染物，具有刺激性，已被归类为对人类的致癌物质。吸附技术安全稳定，能有效去除甲醛，但其使用寿命短，吸附容量低，限制了其在室内的应用。为了克服这些局限性，我们提出了一种原位热再生空气净化器(TRAP)，它可以根据需要进行自我再生。该净化器有四种工作模式：清洁模式、再生模式、排气模式和新风吸入模式，均通过阀门切换进行操作。我们开发了一种以活性碳为吸附剂的真实规模的捕集器原型。实验测试表明，在5次吸附再生循环中，TRAP对甲醛的再生率均大于90%，扫描电子显微镜(SEM)和Brunauer-Emmett-Teller(BET)测试表明，5次循环对吸附材料无损伤。样机净化1000m~3室内空气的总能耗为0.26千瓦时。这种原位热再生方法至少可在5个循环后恢复净化器的吸附能力。
Formaldehyde is a common indoor pollutant that is an irritant and has been classified as carcinogen to humans. Adsorption technology is safe and stable and removes formaldehyde efficiently, but its short life span and low adsorption capacity limit its indoor application. To overcome these limitations, we propose an in-situ thermally regenerated air purifier (TRAP) which self-regenerates as needed. This purifier has four working modes: cleaning mode, regeneration mode, exhaust mode, and outdoor air in-take mode, all of which are operated by valve switching. We developed a real-scale TRAP prototype with activated carbon as adsorbent. The experimental testing showed that the regeneration ratios for formaldehyde of TRAP were greater than 90% during 5 cycles of adsorption-regeneration and that through the 5 cycles, there was no damage to the adsorption material as confirmed by scanning electron microscope (SEM) and Brunauer-Emmett-Teller (BET) tests. The total energy consumption by the prototype for purifying 1000 m3 indoor air was 0.26 kWh. This in-situ thermal-regeneration method can recover the purifier's adsorption ability through at least five cycles.