关键词: 温室气体, 化学过程, 废物处理, 三氟甲烷, 资源化利用, 高温裂解

Abstract: CHF3 is a potent greenhouse gas with global warming potential of 14 800 times higher than that of CO2. Therefore，it plays a very important and critical role in the reduction of greenhouse gas emission. As CHF3 is produced with relatively high purity，it is very beneficial to realize resource utilization rather than high-temperature incineration which is currently used by industry. This review summarizes the research on the resource utilization of waste CHF3 gas. Via high-temperature pyrolysis (>700℃)，CHF3 can be converted to C2F4 (TFE，tetrafluoroethylene) and C3F6 (HFP，hexafluoropropylene) selectively. The presence of a suitable catalyst can significantly improve the conversion of CHF3 and the yields of C2F4 and C3F6. Reaction of CHF3 with CH4 leads to the formation of CH2=CF2 (VDF，vinylidene fluoride)，making it an alternative route for the resource utilization of CHF3. The major shortcoming of this route is its various by-products. CF3I can be synthesized via reaction of CHF3 with I2 which is another attractive process. As a fire-extinguishing agent and refrigerant，the cost of CF3I is relatively high compared with other substitutes. In addition，CF3I is widely used as trifluoromethyl reagent. It is reported that CHF3 can be directly used as trifluoromethyl reagent in the presence of complicated catalysts under harsh conditions and with high cost. This route is still under preliminary exploration in the laboratory and has a long way to commercial application.

Key words: greenhouse gas, chemical processes, waste treatment, trifluotomethane, resource utilization, pyrolysis