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首页> 外文期刊>Building and Environment >In-situ-desorption of indoor relevant VOC toluene and limonene on activated carbon based filter media using high relative humidity
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In-situ-desorption of indoor relevant VOC toluene and limonene on activated carbon based filter media using high relative humidity

机译：使用高相对湿度的原位解吸室内相关VOC甲苯和柠檬烯基于活性碳基过滤介质

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The adsorptive purification of the gas phase is currently gaining more and more importance in the field of heating, ventilation and air conditioning (HVAC) because people spend most of the day in buildings. The so-called VOC (Volatile Organic Compounds) represent a health-relevant category of pollutant gases. To reduce the accumulation of VOC in buildings, adsorptive filters can be integrated into ventilation systems. For reasons of energy efficiency of ventilation systems (low pressure drop), filters with a pleated flat sheet filter media are often used. The special feature of that kind of filter media is that they have low material thicknesses and correspondingly contain small amounts of activated carbon. Their adsorption capacity and thus their service life are accordingly low compared to cartridges. In order to increase the service life of the described filters, the concept of in-situ desorption consisting of 12-h adsorption at 0.9 ppm, 23 degrees C and 50% relative humidity and a subsequent 12-h in-situ-desorption with challenge gas-free air and 50% and 90% RH (23 degrees C) is being investigated on two different activated carbon-based filter media. The substances used are the VOC toluene and D-limonene, which are relevant in indoor air. The more volatile toluene can be desorbed more efficiently than the less volatile limonene. An increase in relative humidity leads to an improvement in desorption, especially for toluene. Stationary cyclic operation is conceivable here. Furthermore, worse desorption is possible on the medium with the more micmporous activated carbon than on the medium with the less microporous activated carbon.
机译：气相的吸附净化目前在加热，通风和空调（HVAC）领域越来越重要，因为人们在建筑物中的大部分时间都花了大部分时间。所谓的VOC（挥发性有机化合物）代表了健康相关的污染物气体类别。为了减少建筑物中VOC的积累，可以将吸附过滤器集成到通风系统中。出于通风系统的能量效率（低压下降）的原因，通常使用具有褶皱平板过滤介质的过滤器。这种过滤介质的特殊特征是它们具有低材料厚度，并且相应地含有少量的活性炭。与墨盒相比，它们的吸附容量并因此对其使用寿命相应低。为了提高所描述的过滤器的使用寿命，原位解吸的概念由12-H吸附以0.9ppm，23℃和50％的相对湿度和随后的12-h原位解吸，与攻击中的挑战为0.9ppm吸附在两种不同的活性炭基过滤介质上研究无瓦斯空气和50％和90％RH（23℃）。使用的物质是VOC甲苯和D-柠檬烯，其在室内空气中相关。挥发性甲苯可以比挥发性柠檬烯更有效地解吸。相对湿度的增加导致解吸的改善，特别是对于甲苯。这里可以想到固定的循环操作。此外，在培养基上可以在具有比具有较低微孔活性炭的培养基上的介质上进行更差的解吸。

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