The large-scale anthropogenic carbon dioxide (CO2) emission has aroused world-wild concerns nowadays. One of the key steps in carbon mitigation is CO2 capture from stationary CO2 emission sources such as power plants. Metal-organic frameworks (MOFs) are coordination polymers consisting of metal ions or clusters as nodes and organic ligands as spacers. The study of CO2 capture using MOFs as adsorbents is booming because of their ultra-high surface area, uniform yet tunable pore size, and versatile chemical compositions. However, several issues still exist preventing their large scale applications, such as selectivity, stability, and material cost. In our research, we aim at circumventing the above problems through rational ligand design and crystal engineering based on UiO-66-type MOFs, with the emphases on 1) mitigating moisture interference, 2) increasing CO2 selectivity, 3) strengthening materials stability, and 4) reducing material cost. The synthesized MOFs have undergone various tests for their eligibility in CO2 capture, such as stability, gas sorption, and breakthrough tests. We have identified several promising MOF candidates with the CO2 capture performance equivalent or even better than the industrial benchmark material zeolite 13X. These materials will be integrated into the next-level process and system studies.

Water stable Metal-Organic Frameworks (MOFs) for CO2 capture

253rd National Meeting (2017)

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