TY - JOUR
T1 - 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
AU - Lo, Benedict T.W.
AU - Lin, Wei che
AU - Li, Molly Meng Jung
AU - Day, Sarah
AU - Tang, Chiu
AU - Tsang, Shik Chi Edman
PY - 2020/4/25
Y1 - 2020/4/25
N2 - 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.
AB - 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.
KW - Methanol conversion
KW - Product distribution
KW - SAPO-34 zeolite
KW - Surface methoxy surface
KW - Synchrotron X-ray powder diffraction
UR - http://www.scopus.com/inward/record.url?scp=85082406885&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2020.117528
DO - 10.1016/j.apcata.2020.117528
M3 - Journal article
AN - SCOPUS:85082406885
VL - 596
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
SN - 0926-860X
M1 - 117528
ER -