Preparation and Performance of Fluorine‐Functionalized Ni‐MOF‐74 Adsorption Columns

ABSTRACT Gas tracer technology plays a crucial role in enhancing oil recovery during oil and gas field development. However, the limited storage capacity and detection efficiency of current gas tracers hinder their broader application. In this study, Ni‐MOF‐74 was successfully synthesized through a solvothermal method and subsequently modified by grafting perfluoroalkyl chains. The results demonstrated that the crystal structure and morphology of the material remained stable following fluorination, while its thermal stability was significantly improved. Notably, the specific surface area decreased with the increasing length of the grafted perfluoroalkyl chains, accompanied by a reduction in surface free energy. Additionally, the number of Lewis acidic sites increased, while the number of Lewis basic sites decreased. Adsorption performance tests revealed that the modified Ni‐MOF‐74 exhibited high adsorption capacities for difluorochloromethane (R22) and tetrafluoroethane (R134a), with values of 2.623 mmol·g −1 and 2.385 mmol·g −1 , respectively. These capacities were significantly higher than those of conventional activated carbon adsorption tubes. This study offers a novel approach to efficient gas tracer storage/detection and provides theoretical insights into the potential application of metal–organic frameworks (MOFs) in oil and gas field development.