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| Title: | Evaluation of Brønsted and Lewis acid sites in H-ZSM-5 and H-USY with or without metal modification using probe molecule-synchrotron X-ray powder diffraction | Authors: | Lo, BTW Lin, WC Li, MMJ Day, S Tang, C Tsang, SCE |
Issue Date: | 25-Apr-2020 | Source: | Applied catalysis. A, General, 25 Apr. 2020, v. 596, 117528 | Abstract: | The adsorbate interactions of furans as probe molecules in H-ZSM-5 and H-USY with and without metal ion modification have been revealed by synchrotron X-ray powder diffraction (SXRD). The Rietveld refinements give both qualitatively and quantitatively the spatial arrangements and adsorption geometries of furan and 2,5-dimethylfuran (DMF) on the Brønsted acid sites (BAS) and metal Lewis acid sites (LAS). The bonding information between the adsorbate-framework can also be correlated with thermogravimetric findings. The use of probe molecule-SXRD can be used as a new characterisation tool which can spatially interrogate the acidity of crystalline porous catalysts, leading to molecular engineering of new catalytic systems. | Keywords: | Methanol conversion Product distribution SAPO-34 zeolite Surface methoxy surface Synchrotron X-ray powder diffraction |
Publisher: | Elsevier | Journal: | Applied catalysis. A, General | EISSN: | 0926-860X | DOI: | 10.1016/j.apcata.2020.117528 | Rights: | © 2020 Published by Elsevier B.V. © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Lo, B. T. W., Lin, W.-c., Li, M. M. J., Day, S., Tang, C., & Tsang, S. C. E. (2020). Evaluation of Brønsted and Lewis acid sites in H-ZSM-5 and H-USY with or without metal modification using probe molecule-synchrotron X-ray powder diffraction. Applied Catalysis A: General, 596, 117528 is available at https://dx.doi.org/10.1016/j.apcata.2020.117528. |
| Appears in Collections: | Journal/Magazine Article |
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| Lo_Brønsted_Lewis_Acid.pdf | Pre-Published version | 3.18 MB | Adobe PDF | View/Open |
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