Removal of chemical hazardous compounds using CATACOAT, a nano-platinum thermal catalyst system.

The performance of CATACOAT, a nano-platinum thermal catalyst system, was evaluated for the removal of chemical hazardous compounds from air. Xylene, benzene, styrene, and toluene were selected as standard volatile organic compounds (VOCs) in this study. In addition, formaldehyde was tested as a chemical hazardous compound. Each VOC, or formaldehyde, was evaporated in a 4,000 L chamber under controlled environments. At the maximum concentration point, CATACOAT was turned on and the concentrations of the chemical hazardous compounds were recorded for 5 h. The air purifier based on H-13-grade high-efficiency particulate air (HEPA) filter was tested in the same way to compare the effects of CATACOAT. Compared with the HEPA filter system, every VOC concentration was significantly decreased with the CATACOAT system only 0.025 h after turning on the air purifier (P values for xylene, benzene, styrene, and toluene are 0.00488, 0.01508, 0.00014, and 0.04690, respectively). After running the air cleaners for 5 h, every VOC and formaldehyde demonstrated significantly decreased concentrations with the CATACOAT system, compared with HEPA filter system (P values for xylene, benzene, styrene, toluene, and formaldehyde are 0.00034, 0.00009, 0.00008, 0.00001, and 0.00571, respectively). In conclusion, the CATACOAT may be a viable solution to control indoor air pollution.