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CO2 cycloaddition of styrene oxide over MOF catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
40393 45852 2013 6 PDF Available
Title
CO2 cycloaddition of styrene oxide over MOF catalysts
Abstract

Metal organic framework (MOF) structures of UIO-66, UIO-66-NH2, Mg-MOF-74, MIL-101, CuBTC, ZIF-8, IRMOF-3, and MOF-5 having different acid/base properties were prepared and tested for their catalytic activity in the CO2 cycloaddition to styrene epoxide using a high-pressure batch reactor. The high crystallinity and excellent textural properties of the prepared MOF materials were confirmed by XRD and the N2 adsorption–desorption isotherms at 77 K. Their catalytic cycloaddition activities were found to be well correlated with the Lewis acid/base distributions of the materials examined by NH3- and CO2-TPD, respectively, such that the concurrent presence of Lewis acid and base sites were desirable for high catalytic activity. For a given catalyst weight, UIO-66-NH2 showed the best catalytic performance among the MOF samples tested with close to 100% selectivity to carbonate in chlorobenzene under relatively mild reaction conditions (2.0 MPa, 373 K). UIO-66-NH2 could be reused 3 times without losing catalytic activity in a truly heterogeneous mode without structural deterioration, and it also exhibited excellent cycloaddition activities for different epoxide substrates as well.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (151 K)Download as PowerPoint slideHighlights► Representative MOFs were prepared and tested for CO2 cycloaddition to styrene epoxide. ► Catalytic activities were correlated with their acidity/basicity examined by NH3- and CO2-TPD. ► Reaction mechanism for 3 different cases were proposed. ► Catalyst stabilities were evaluated by hot-filtring and recycle test.

Keywords
Metal organic frameworks (MOFs); CO2 cycloaddition; Lewis acid/base; NH3- and CO2-TPD; UIO-66-NH2
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CO2 cycloaddition of styrene oxide over MOF catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 453, 26 February 2013, Pages 175–180
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us