Hydrocarbon recovery using ultra-microporous fluorinated MOF platform with and without uncoordinated metal sites: I- Structure properties relationships for C2H2/C2H4 and CO2/C2H2 separation
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Chemical Science Program
Functional Materials Design, Discovery and Development (FMD3)
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Online Publication Date2018-11-15
Print Publication Date2019-03
Permanent link to this recordhttp://hdl.handle.net/10754/629940
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AbstractIn this work, the reticular chemistry approach was implemented on a very stable ultra-microporous fluorinated MFFIVE-1-Ni MOFs to unveil the effect of subtle changes of the structure-employment of different fluorinated inorganic block on the adsorption of C2H2, C2H4 and CO2. A series of variable temperature single C2H2, C2H4 and CO2 adsorption isotherms and mixed gas adsorption column breakthrough experiments for different C2H2/C2H4 and CO2/C2H2 gas pair systems were carried out on the two isoreticular NbOFFIVE-1-Ni and AlFFIVE-1-Ni, containing respectively [NbOF5]2- and [AlF5]2- inorganic building blocks. The introduction of potential open metal site in a very confined pores led to favoring interaction of C2H2 but lowering the interaction with CO2, which resulted in enhancement of C2H2/C2H4 selectivity at low C2H2 concentration but a decrease in CO2/C2+ selectivity. The comparison of the C2H2/C2H4 and CO2/C2H2 separation performances with the structures of the MFFIVE-1-Ni MOFs provides useful information to shed light on the relationship between the structural features of this MOF platform and C2H2/C2H4 and CO2/C2H2 separation properties. This is a critical step in the wanted rational discovery/design of materials with enhanced performances for C2H2 recovery from C2H4 and CO2 at different concentration and having different level of input energy for recycling.
CitationBelmabkhout Y, Zhang Z, Adil K, Bhatt PM, Cadiau A, et al. (2019) Hydrocarbon recovery using ultra-microporous fluorinated MOF platform with and without uncoordinated metal sites: I- structure properties relationships for C2H2/C2H4 and CO2/C2H2 separation. Chemical Engineering Journal 359: 32–36. Available: http://dx.doi.org/10.1016/j.cej.2018.11.113.
SponsorsWe would like also to acknowledge the support of King Abdullah University of Science and Technology. The National Natural Science Foundation of China (21725603 and 21476192) and National Program for Support of Top-notch Young Professionals (H. X.)
JournalChemical Engineering Journal