The Possibility of Balancing VOC Concentration Fluctuations by a Flow through an Activated Carbon Bed

摘要

Waste gases from periodic processes often contain VOC concentrations which fluctuate significantly. This causes trouble during their cleaning, for example by thermal destruction. A simple experiment has demonstrated that such concentration fluctuations can be dampened by flowing the polluted gas through a layer of adsorbent. Measurements of balancing the concentration fluctuations of triethylamine (TEA) by flowing through an activated carbon bed showed that balancing average TEA inlet concentrations of 7-30 g/m(3) occurs at a superficial velocity lower than 4-0.6 cm/s, which corresponds to a residence time of 37-250 s. An important notion is that balancing the fluctuations may be achieved independently of dividing the time of TEA presence in the inlet air if the given average 8 h TEA concentration at the inlet can be retained.