การออกแบบคอลัมน์ดูดซับ เพื่อบำบัดสาร VOC ในอากาศ ในอุตสาหกรรมเคลือบผิว

Abstract

In order to study the removal of volatile organic compounds, the activated carbon adsorption column was conducted in this project. The toluene was selected as a volatile organic compound, and granular activated carbon was used as an adsorbent. The influence of process variables: flow rate of contaminate gas and bed height were investigated in this study. These factors were considered to analyze removal efficiency and can lead to understand in scale-up for adsorption process. The experiments were set to study the impact of contaminate gas flow rate and bed height of the activated carbon adsorption column. The designed column is 5 cm diameter and 30 cm height. The contaminate gas concentration was 850-1000 ppm. The experiments were categorized into two parts; the first part was fixed 20 cm bed height and the flow rate of contaminate gas were from 5, 10 to 20 L/min. It was found that the higher inlet flow rate of contaminate gas, lower removal efficiency for toluene contaminate gas. The second part of experiment, the inlet flow rate of contaminate gas was fixed at 10 L/min and the bed height were varied as 15 and 25 cm. The result was shown that the higher bed height gives higher removal efficiency. Moreover, the data of this project were taken to design the scaling up adsorption column.