Splitting Mono- and Dibranched Alkane Isomers by a Robust Aluminum-Based Metal–Organic Framework Material with Optimal Pore Dimensions
Acharya, Shree Ram
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Chemical Science Program
Nanostructured Functional Materials (NFM) laboratory
Physical Science and Engineering (PSE) Division
Online Publication Date2020-03-28
Print Publication Date2020-04-15
Embargo End Date2021-03-28
Permanent link to this recordhttp://hdl.handle.net/10754/662423
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AbstractThe separation of alkanes with different degrees of branching, particularly mono- and dibranched isomers, represents a challenging yet important industrial process for the production of premium gasoline blending components with high octane number. We report here the separation of linear/monobranched and dibranched alkanes through complete molecular sieving by a robust aluminum-based MOF material, Al-bttotb (H3bttotb = 4,4',4″-(benzene-1,3,5-triyltris(oxy))tribenzoicacid). Single- and multicomponent adsorption experiments reveal that the material adsorbs linear and monobranched alkanes, but fully excludes their dibranched isomers. Adsorption sites of alkanes within the MOF channels have been identified by single-crystal X-ray diffraction studies, and the adsorption mechanism was explored through computational calculations and modeling. The highly selective adsorption of the MOF should be attributed to its optimal pore dimensions.
CitationYu, L., Dong, X., Gong, Q., Acharya, S. R., Lin, Y., Wang, H., … Li, J. (2020). Splitting Mono- and Dibranched Alkane Isomers by a Robust Aluminum-Based Metal–Organic Framework Material with Optimal Pore Dimensions. Journal of the American Chemical Society. doi:10.1021/jacs.0c01769
SponsorsWe thank the National Natural Science Foundation of China (21901166) and Guangdong Natural Science Foundation(2019A1515010692) for financial support. Work in the U.S. was entirely supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Award No. DE-SC0019902.
PublisherAmerican Chemical Society (ACS)
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