Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6972925 | Journal of Loss Prevention in the Process Industries | 2018 | 6 Pages |
Abstract
Trifluoroethylene and its mixtures are useful as next generation refrigerants because of their lower global warming potential (GWP) than that of those ordinarily used. Trifluoroethylene, however, has the potential to disproportionate explosively, as does tetrafluoroethylene. In the present research, we quantitatively searched for conditions in which trifluoroethylene undergoes disproportionation. We modified the ignition apparatus as so it could be performed using electromagnetic force, we simulated spark phenomena in air conditioners and analyzed the disproportionation process of trifluoroethylene using that equipment. The spark energy yielding 1% probability of disproportionation was found to be 6.33Â J, at which pressure was 1Â MPa and temperature was 373Â K. It was revealed that trifluoroethylene had much higher minimum ignition energy than that of ordinary combustible materials such as methane and hydrogen. The reason for the high ignition energy needed to initiate disproportionation of trifluoroethylene was considered to be that the flame kernel needed to have a large size and a long lifetime to propagate the disproportionation reaction because of its lower frequency factor of producing solid graphite. The fact that the delay time of trifluoroethylene disproportionation was 0.1Â s also explained the lower frequency factor of producing solid graphite.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Health and Safety
Authors
Tetsuo Otsuka, Katsuya Ueno, Hidekazu Okamoto, Masamichi Ippommatsu, Ritsu Dobashi,