Influence of Acid-Base Characteristics of Different Structural-Type Zeolites (FER, MFI, FAU, BEA) on Their Activity and Selectivity in Isobutanol Dehydration

0585658 - ÚFCH JH 2025 RIV US eng J - Journal Article
Zikrata, O. V. - Larina, O. V. - Balakin, Dmytro Yu. - Nychiporuk, Yu. M. - Khalakhan, I. - Svegovec, M. - Volavsek, J. - Yaremov, P. S. - Soloviev, S. O. - Orlyk, S. M.
Influence of Acid-Base Characteristics of Different Structural-Type Zeolites (FER, MFI, FAU, BEA) on Their Activity and Selectivity in Isobutanol Dehydration.
ChemCatChem. (2024). ISSN 1867-3880. E-ISSN 1867-3899
Institutional support: RVO:61388955
Keywords : temperature-programmed desorption * x-ray-diffraction * skeletal isomerization * external surface * ab-initio * catalysts * sites * water * ferrierite * conversion * zeolites * isobutanol dehydration * alkenes * structure-activity relationships * acidity.
OECD category: Physical chemistry
Impact factor: 4.5, year: 2022
Method of publishing: Limited access
https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/cctc.202400068

The different structural-type zeolites (FER, MFI, FAU, BEA) are investigated as catalysts in (bio)isobutanol conversion into linear butenes. The zeolites´ structure and morphology are confirmed by XRD, N2 (77 K) ad(de)sorption, SEM, EDX, XPS, and 27Al, 29Si, 1H MAS NMR, 1H-29Si CP MAS NMR. The nature and strength of acid-base sites are determined by FTIR spectroscopy of adsorbed pyridine, potentiometric titration, and TPD of NH3/CO2/H2O with MS control. The acid-base properties of the zeolites ' surfaces influence their catalytic properties in the target process. The higher selectivity towards linear butene isomers achieved over FER and MFI can be explained by the high strength and density of Bronsted acid sites (over 90 % of the total surface acidity). MFI might be regarded as a potential material for the creation of novel catalysts for isobutanol conversion into linear butenes at moderate temperatures (448-473 K) since it offers greater operating stability throughout the process.
Permanent Link: https://hdl.handle.net/11104/0353336