Best available control technology (BACT) of VOC for PU (polyurethane) synthetic leather surface coating industry in Taiwan
In Taiwan, the polyurethane (PU) synthetic leather surface coating industry produced about 61,400 tons of volatile organic compound (VOC) emissions, accounting for 11 % of total stationary emissions of VOC. The industry is the largest VOC emission source in Taiwan. Major pollutants are dimethyl formamide (DMF), toluene, and methyl ethyl ketone (MEK). To obtain the best available control technology (BACT) of VOC emissions for the PU synthetic leather surface coating industry, this study followed the BACT guidelines of US EPA. For DMF, the BACT was the wet scrubbing technology for exhaust gas treatment, followed by a solvent recovery system. The change of coating methods or solvents, e.g., the use of water-base instead of organic-base solvents, was found to be the BACT for toluene and MEK. Through computer simulation, a wet scrubber with three in-series packing towers was found to be the most effective and economic for DMF. Based on the simulation, a full scale of plant was built and the test results were presented in this study. Results showed that 99% removal efficiency of DMF was achieved and the annual operation cost could be retrieved through the recovery of DMF solvent. The regulation for the industry established based on the BACT was also described in this study.
- Research Organization:
- Industrial Technology Research Inst., Hsinchu (TW)
- OSTI ID:
- 20002218
- Report Number(s):
- CONF-990608--
- Country of Publication:
- United States
- Language:
- English
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