Countermeasures for Exhaust Prevention of Organic Solvents at Print Shop III Removal of Organic Solvents by Catalytic Oxidation Method

• Published in: Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi Vol. 32; no. 3; pp. 223 - 230
• Main Authors: YANO, Hisato, SHODA, Makoto
• Format: Journal Article
• Language: English; Japanese
• Published: Japan Society for Atmospheric Environment 1997
• Subjects: catalytic oxidation method; concentration in working environment; organic solvents; print shop; removal efficiency
• ISSN: 1341-4178; 2185-4335
• DOI: 10.11298/taiki1995.32.3_223

The purpose of this paper is to examine countermeasures for exhaust prevention of organic solvents at a given print shop in preparation for its reconstruction. Experiment on the removal of organic solvents with a bench-scale catalytic oxidative deodorization apparatus was performed on the actual exhaust gas of the print shop. The relation between the reaction temperature and the removal efficiency, with space velocity (SV) as the parameter, in four kinds of catalysts were investigated. The removal efficiency of platinum catalyst (catalyst A) for ethyl acetate and that of manganese plus copper catalyst (catalyst C) for toluene were low. The catalyst which showed the highest removal efficiency was a combination of catalyst A (platinum) and catalyst C (manganese plus copper). Removal efficiency was nearly 100% under conditions of SV = 33, 000 hr-1 and reaction temperature of 20°C Taking these results into consideration, the exhaust gas was treated by catalytic oxidative deodorization method when a new print shop was constructed. The results were as follows: the average concentration of the inlet exhaust gas was 528 ppm, the removal efficiency of the catalytic oxidative deodorization apparatus was 97.9-98.7% at a reaction temperature of 20°C, and the concentration in the working environment was 120.9 ppm. All data were satisfactory to meet the initial purpose.