Treatment of Gaseous Formaldehyde with Continuous Source in a Closed Modeling Room Using Ozonation

Abstract

This research aims to study the treatment of gaseous formaldehyde in a closed modeling room with continuous source using ozonation. The kinetics study of formaldehyde treatment was also included in this work. Gaseous formaldehyde was prepared from analytical grade formalin in a glass preparation room with the dimension of 1.15 x 1.15 x 1.15 m³ which is directly connected to the glass modeling room with the dimension of 1.2 x 1.2 x 1.8 m³. The glass reactor with the dimension of 25 x 40 x 15 cm³ was installed in the modeling room. Factors affecting the treatment of gaseous formaldehyde studied included initial concentration of formaldehyde and dosage of ozone. The initial concentrations and ozone dosages were varied as 5, 7.5, 10 and 15 ppm and 300 and 1,000 mg/hr, respectively. The air flow rate was set at about 5 L/min and the treatment time was around 170 min. Results from treatment efficiency of formaldehyde revealed that at 5 ppm formaldehyde initial concentration and ozone dosage of 1,000 mg/hr yielded the highest efficiency of 100%. The kinetics of formaldehyde treatment follows the zero order reaction.