Research progress on porous adsorbent materials for fluorinated gas adsorption and separation

Fluorinated gases （F-gases） , primarily consisting of chlorofluorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons, perfluorinated compounds, sulfur hexafluoride, and nitrogen trifluoride, are widely used in the industrial sectors such as refrigeration, semiconductor manufacturing, and electrical insulation for power equipment due to their excellent chemical stability, thermodynamic properties, and electrical insulation capabilities. However, these characteristics also result in their long atmospheric lifetime and strong infrared radiation absorption capacity, leading to a high global warming potential and posing a continuous and severe threat to the global climate system. Although international legal instruments such as The Montreal Protocol on Substances that Deplete the Ozone Layer （hereinafter referred to as the Montreal Protocol） and its Kigali Amendment to the Montreal Protocol on Substances that Deplete the Ozone Layer （hereinafter referred to as the Kigali Amendment）, along with relevant national laws and regulations, have imposed strict controls on the production and use of F-gases, their irreplaceability in many industrial fields has led to a continuous increase in their atmospheric concentrations worldwide. Therefore, the development of efficient and feasible F-gases treatment and disposal technologies is particularly urgent. This review systematically summarizes the emission sources, environmental impacts, and control policies of F-gases; based on literature metrics analysis, it reveals the research progress in F-gases treatment and disposal technologies, with a focus on the current research hotspot—adsorption technology. It summarizes strategies for enhancing the adsorption performance and selectivity of F-gases through structural regulation and surface modification, clarifies the adsorption mechanisms and cycle stability of various materials for different types of F-gases, and further analyzes the challenges faced in scaling up adsorption technology under complex operating conditions such as high humidity and multi-component competitive adsorption. This review aims to provide references for the development of efficient adsorbent materials and the optimization of F-gases adsorption processes, thus offering theoretical support for achieving deep reduction of F-gases and contributing to the realization of the “dual carbon” strategic goals.