Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction
Abstract
The acidity of hierarchical USY, Beta and ZSM-5 zeolites obtained by alkaline treatment was investigated. Samples were characterized by low temperature nitrogen adsorption, X ray diffraction and solid-state (27)AI MAS NMR. Acidity of parent and mesoporous samples was estimated through the adsorption of typical probe molecules - measurements were conducted in both gas phase (microcalorimetry/volumetry of ammonia adsorption, FTIR spectrometry of pyridine adsorption/desorption) and aqueous phase (calorimetry of phenylethylamine adsorption). Quantitative distributions in strength of the acid sites were determined, as well as acid sites concentrations. No significant changes in total acidity were detected for ZSM-5. Acid sites strength was decreased in modified Beta and USY zeolites. The samples were probed as catalysts for the dehydration of fructose. Higher selectivities towards 5-hydroxymethylfurfural were detected for all modified zeolites, compared to the parent ones.
Keywords:
Hierarchical zeolites / Acidity / Calorimetry / Fructose dehydrationSource:
Microporous and Mesoporous Materials, 2014, 194, 126-134Publisher:
- Elsevier Science Bv, Amsterdam
Funding / projects:
- Oxide-based environmentally-friendly porous materials for genotoxic substances removal (RS-MESTD-Basic Research (BR or ON)-172018)
DOI: 10.1016/j.micromeso.2014.04.003
ISSN: 1387-1811
WoS: 000337867300018
Scopus: 2-s2.0-84899460596
Collections
Institution/Community
Poljoprivredni fakultetTY - JOUR AU - Rac, Vladislav AU - Rakić, Vesna AU - Stošić, Dušan AU - Otman, Otman AU - Auroux, Aline PY - 2014 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/3414 AB - The acidity of hierarchical USY, Beta and ZSM-5 zeolites obtained by alkaline treatment was investigated. Samples were characterized by low temperature nitrogen adsorption, X ray diffraction and solid-state (27)AI MAS NMR. Acidity of parent and mesoporous samples was estimated through the adsorption of typical probe molecules - measurements were conducted in both gas phase (microcalorimetry/volumetry of ammonia adsorption, FTIR spectrometry of pyridine adsorption/desorption) and aqueous phase (calorimetry of phenylethylamine adsorption). Quantitative distributions in strength of the acid sites were determined, as well as acid sites concentrations. No significant changes in total acidity were detected for ZSM-5. Acid sites strength was decreased in modified Beta and USY zeolites. The samples were probed as catalysts for the dehydration of fructose. Higher selectivities towards 5-hydroxymethylfurfural were detected for all modified zeolites, compared to the parent ones. PB - Elsevier Science Bv, Amsterdam T2 - Microporous and Mesoporous Materials T1 - Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction EP - 134 SP - 126 VL - 194 DO - 10.1016/j.micromeso.2014.04.003 ER -
@article{ author = "Rac, Vladislav and Rakić, Vesna and Stošić, Dušan and Otman, Otman and Auroux, Aline", year = "2014", abstract = "The acidity of hierarchical USY, Beta and ZSM-5 zeolites obtained by alkaline treatment was investigated. Samples were characterized by low temperature nitrogen adsorption, X ray diffraction and solid-state (27)AI MAS NMR. Acidity of parent and mesoporous samples was estimated through the adsorption of typical probe molecules - measurements were conducted in both gas phase (microcalorimetry/volumetry of ammonia adsorption, FTIR spectrometry of pyridine adsorption/desorption) and aqueous phase (calorimetry of phenylethylamine adsorption). Quantitative distributions in strength of the acid sites were determined, as well as acid sites concentrations. No significant changes in total acidity were detected for ZSM-5. Acid sites strength was decreased in modified Beta and USY zeolites. The samples were probed as catalysts for the dehydration of fructose. Higher selectivities towards 5-hydroxymethylfurfural were detected for all modified zeolites, compared to the parent ones.", publisher = "Elsevier Science Bv, Amsterdam", journal = "Microporous and Mesoporous Materials", title = "Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction", pages = "134-126", volume = "194", doi = "10.1016/j.micromeso.2014.04.003" }
Rac, V., Rakić, V., Stošić, D., Otman, O.,& Auroux, A.. (2014). Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction. in Microporous and Mesoporous Materials Elsevier Science Bv, Amsterdam., 194, 126-134. https://doi.org/10.1016/j.micromeso.2014.04.003
Rac V, Rakić V, Stošić D, Otman O, Auroux A. Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction. in Microporous and Mesoporous Materials. 2014;194:126-134. doi:10.1016/j.micromeso.2014.04.003 .
Rac, Vladislav, Rakić, Vesna, Stošić, Dušan, Otman, Otman, Auroux, Aline, "Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction" in Microporous and Mesoporous Materials, 194 (2014):126-134, https://doi.org/10.1016/j.micromeso.2014.04.003 . .