1,1,1,2-Tetrafluoroethane (HFC 134a), a chlorine-free hydrofluoroalkane, is internationally replacing billions of pounds of dichlorodifluoromethane (CFC 12) for coolant, refrigerant and aerosol propellant applications. The ALC50 for HFC 134a in rats is 567,000 ppm for 4 h; its potential for cardiac
Guang pu xue yu guang pu fen xi = Guang pu, 18(3), 319-324 (2005-04-07)
For the management of refractory hazardous wastes, an innovative technology emerging recently is the application of ultra high temperature plasma. The preliminary study on destruction of Freon 12 by ICP (1-2kW) under a joint program between Xiamen Univ. and Hong
The Review of scientific instruments, 80(11), 113106-113106 (2009-12-02)
We introduce a beam profiler of pulsed lasers based on the photoacoustic technique. The method assumes that the initial pressure distribution inside the acoustic cell follows the laser intensity pattern if absorbed energy relaxes rapidly. This initial pressure condition can
Gas-phase reaction of CFC-12 (CCl2F2) with methane was carried out in a plug flow reactor over the temperature range of 873-1123 K. The major organic halocarbons formed during the reaction were C2F4, C2H2F2, CHClF2, CH3Cl, C3H2F6 and CCl3F. The formation
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering, 46(9), 989-996 (2011-08-19)
The hydrodechlorination of chlorodifluoromethane (HCFC-22) was performed by a catalytic reaction and noncatalytic thermal decomposition at high temperatures of 400-800 °C. After 47 h of time-on-stream on a supported palladium (Pd) catalyst, the gas phase composition of difluoromethane (HFC-32) is
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