Experimental Studies on Removal of Air-Borne Haloanisoles by Photocatalytic Oxidation and Plasma Air Purifiers

摘要

A laboratory study was conducted to test the performance of photocatalytic oxidation (PCO) and plasma oxidation air purifiers on their removal effectiveness of the two haloanisoles - 2,4,6–trichloroanisole (TCA) and 2,4,6-Tribromoanisole (TBA).TCA and TBA are the two major compounds found in wine cellars that can contaminate wine to produce unpleasant mouldy and musty odours.The test was conducted in a climate chamber for indoor air quality study.The PCO and plasma air purifiers were installed in a test rig developed for the testing and challenged by airflow with certain concentrations of TCA and TBA.Air samples upstream and downstream of the two air purifiers were collected by Tenax tubes and the concentration of TCA and TBA were analyzed by thermal desorption GC-MS.The results showed that both PCO and plasma are effective on removing TCA and TBA with a single pass efficiency of better than 75 ％.The two technologies may be used in wine cellar to remove the two airborne contaminants and prevent the wine from being contaminated during storage.