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

摘要： 三氟甲烷（CHF3）是一种强温室气体，其温室效应潜值是CO2的14 800倍，因此，CHF3的处理是温室气体减排中一个十分重要和关键的课题。CHF3的排放源相对集中，纯度较高，因此十分有利于对其进行资源化利用而非目前所采取的高温焚烧法。本文主要综述了有关CHF3废气的资源化利用的研究现状，指出对其进行高温裂解（700 ℃以上），可以选择性地合成C2F4（TFE，四氟乙烯）和C3F6（HFP，六氟丙烯）。合适的催化剂可以显著提高CHF3转化率及C2F4和C3F6的收率。CHF3与CH4反应可以高选择性地合成CH2=CF2（VDF，偏氟乙烯），具有一定的工业价值；其缺点是副产物较多。而利用CHF3与I2反应合成CF3I，是另一条较有吸引力的工艺路线。CF3I不仅可以作为灭火剂及制冷剂，而且作为三氟甲基化试剂也具有很大的市场空间。将CHF3直接作为三氟甲基化试剂还处于实验室初步探索阶段，其过程条件较为苛刻及成本较高，将其作为CHF3处理路线还有待长时间探索。

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