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Experimental evaluation of in-duct electronic air cleaning technologies for the removal of ketones

机译：试管电子空气清洁技术去除酮的试验评价

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摘要

Reducing volatile organic compounds (VOCs) concentrations in built environments is necessary to achieve acceptable indoor air quality or comply with workplace regulations. Different air cleaning technologies are applied for the removal of VOCs. Unlike conventional adsorption-based technologies like activated carbons, socalled electronic air cleaning (EAC) technologies generate reactive species directly or indirectly to oxidize VOCs. In this study, dynamic single pass tests were conducted in a test rig consisting of four identical test ducts with individual flow control, allowing simultaneous evaluation of four different air purification systems under identical conditions. Three oxidation-based air-cleaning technologies were considered: photocatalytic oxidation (PCO), non-thermal plasma (NTP), and ozonation (O3). A total of 17 different configurations of EAC systems were tested for acetone and/or methyl ethyl ketone (MEK) removal. These include 12 different commercial PCO units, one in-house pilot PCO, two plasma, and two ozonation units. Sixteen of them were tested for the removal of 0.1 ppm MEK and their single pass removal efficiencies varied from 0 to 37%. Eleven of them were examined for the removal of 0.1 and 1 ppm of acetone and the removal efficiencies were between 0 and 23%. Ozonation and PCObased system using ozone generating vacuum UV lamps generally showed a higher efficiency than PCO-based system with non-ozone generating UVC lamps or plasma units. Formaldehyde, acetaldehyde, and acetone were detected as the oxidation by-products in MEK testing. PCO-based systems tend to generate more byproducts.
机译：在建造环境中减少挥发性有机化合物（VOCS）浓度是必要的，以实现可接受的室内空气质量或遵守工作场所规定。不同的空气清洁技术用于去除VOC。与常规的基于吸附的技术不同，如激活的碳，商标电子空气清洁（EAC）技术直接产生反应性物种以氧化VOC。在该研究中，动态单通测试在由具有单个流量控制的四个相同的测试管道组成的试验台中进行，允许在相同条件下同时评估四种不同的空气净化系统。考虑了三种氧化的空气清洁技术：光催化氧化（PCO），非热血浆（NTP）和臭氧（O3）。对于丙酮和/或甲基乙基酮（MEK）去除，总共17种不同的EAC系统配置。这些包括12个不同的商用PCO单元，一个内部导频PCO，两种等离子体和两个臭氧单位。测试了十六次去除0.1ppm mek，它们的单次通过去除效率可达0％至37％。检查它们的11个以除去0.1和1ppm的丙酮，去除效率为0和23％。使用臭氧产生真空UV灯的臭氧和PCOBASED系统通常显示出比基于PCO的系统更高的效率，具有非臭氧产生UVC灯或等离子体单元。甲醛，乙醛和丙酮被检测为MEK测试中的氧化副产品。基于PCO的系统倾向于产生更多的副产品。

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