The enforcement of a global hydrofluorocarbon (HFC) refrigerant phase down led to the introduction of hydrofluoroolefins (HFOs) as a low Global Warming Potential (GWP) substitute, given their low atmospheric lifetime. However, to this date it is not fully clear the long‐term atmospheric fate of HFOs primary degradation products: trifluoro acetaldehyde (TFE), trifluoro acetyl fluoride (TFF), and trifluoroacetic acid (TFA). It particularly concerns the possibility of forming HFC‐23, a potent global warming agent. Although the atmospheric reaction networks of TFE, TFF, and TFA have a fair level of complexity, the relevant atmospheric chemical pathways are well characterized in the literature, enabling a comprehensive hazard assessment of HFC‐23 formation as a secondary HFO breakdown product in diverse scenarios. A lower bound of the HFOs effective GWP in a baseline scenario is found above regulatory thresholds. While further research is crucial to refine climate risk assessments, the existing evidence suggests a non‐negligible climate hazard associated with HFOs.

中文翻译：

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影响商用氢氟烯烃气体有效全球变暖潜能值的化学途径

鉴于氢氟碳化物 (HFC) 制冷剂在大气中的寿命较短，随着全球逐步减少氢氟碳化物 (HFC) 制冷剂的实施，氢氟烯烃 (HFO) 被引入作为低全球变暖潜能值 (GWP) 的替代品。然而，迄今为止，尚不完全清楚氢氟烯烃主要降解产物：三氟乙醛（TFE）、三氟乙酰氟（TFF）和三氟乙酸（TFA）的长期大气归宿。它特别涉及形成 HFC-23（一种有效的全球变暖剂）的可能性。尽管 TFE、TFF 和 TFA 的大气反应网络具有相当的复杂性，但相关的大气化学路径在文献中得到了很好的描述，使得能够在不同场景下对作为二次 HFO 分解产物的 HFC-23 形成进行全面的危害评估。基准情景中 HFO 有效 GWP 的下限高于监管阈值。虽然进一步的研究对于完善气候风险评估至关重要，但现有证据表明与氢氟烯烃相关的气候危害不可忽视。