Study on adsorption of indoor CO2 by using CO2 adsorption equipment

초록

Indoor CO2 is a representative indicator of ventilation. Therefore, low CO2 concentration means the indoor space is properly ventilated. Though CO2 is not seriously toxic to human at low concentration, there are studies reporting the danger of high indoor CO2 concentration, e.g., headache, sleepiness, and even low concentration. Indoor CO2 concentration can be lowered by ventilation, but there are some cases when the ventilation is not available. For example, the contamination of ambient air may worsen the indoor air during ventilation. In this study, an alternative way to reduce the indoor CO2 concentration using CO2 adsorbent was suggested. CO2 concentration change with and without the operation of CO2 adsorption equipment was monitored. It was found that our CO2 adsorption equipment could keep the indoor CO2 concentration lower than 1,000 ppm without any ventilation in the presence of residents.