New challenge of microporous metal-organic frameworks for adsorption of hydrogen fluoride gas

[Display omitted] •HF adsorption capacities of four MOFs under unique conditions were studied.•MOFs have higher HF uptakes than commercial Al2O3 and 13X zeolite.•The HF adsorption of MIL-101(Cr) can be regenerated up to 90%. To avoid the health threat and environmental pollution as well as to preserve the life of industrial equipment, it is very important and necessary to find an efficient method for detecting and eliminating HF gas. In the present work, four MOFs including Cu-BTC, ZIF-8, MIL-53(Al) and MIL-101(Cr) with various surface area, functionalities, and pore sizes were selected for their HF adsorption capacities studied under unique conditions. As comparison, commercial Al2O3 powder and 13X zeolite were also investigated under the same conditions. It is resulted that the MOFs have higher HF uptakes than commercial Al2O3 and 13X zeolite. MIL-53(Al) have a highest HF capacity, and the HF adsorption of MIL-101(Cr) can be regenerated up to 90%. To the best of our knowledge, this is the first work of studying the HF adsorption behaviors of MOFs, which provides a new perspective of MOFs in a new field of practical purify application.