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Influence of the desilication process on the acidity of HZSM-5 zeolite
dc.creator | Rac, Vladislav | |
dc.creator | Rakić, Vesna | |
dc.creator | Miladinović, Zoran | |
dc.creator | Stosić, Dušan | |
dc.creator | Auroux, Aline | |
dc.date.accessioned | 2023-06-01T09:35:47Z | |
dc.date.available | 2023-06-01T09:35:47Z | |
dc.date.issued | 2013 | |
dc.identifier.issn | 0040-6031 | |
dc.identifier.uri | https://riofh.iofh.bg.ac.rs/handle/123456789/268 | |
dc.description.abstract | The influence of the alkaline treatment on the acidity of zeolite ZSM-5 (SiO2/Al2O3 = 23, 50 and 80) modified by desilication was investigated. The samples were characterized by X-ray diffraction, low temperature adsorption of nitrogen and solid-state Al-27 MAS NMR. Acidity of the samples was investigated using microcalorimetry-volumetry of ammonia adsorption at 423 K. Acid sites accessibility and intracrystalline diffusion were estimated by the thermokinetic parameter. The desilication process was shown to be Si/Al ratio dependant. Relative enhancement of mesopore surface decreased in the following order of SiO2/Al2O3: 50 >80 >23. Pore size distribution broadened and mesopore sizes increased with increasing Si/Al ratio. For samples with SiO2/Al2O3 = 50 and 80 almost full preservation of acid sites strength and distribution was achieved. Significant alteration of the acidity was found for the mesoporous sample with SiO2/Al2O3 = 23. Thermokinetic parameter values indicate facilitated intracristalline diffusion for mesoporous samples. | en |
dc.publisher | Elsevier, Amsterdam | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172018/RS// | |
dc.rights | restrictedAccess | |
dc.source | Thermochimica Acta | |
dc.subject | Thermokinetic parameter | en |
dc.subject | Microcalorimetry | en |
dc.subject | Hierarchical ZSM-5 | en |
dc.subject | Desilication | en |
dc.subject | Acidity | en |
dc.title | Influence of the desilication process on the acidity of HZSM-5 zeolite | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 78 | |
dc.citation.other | 567: 73-78 | |
dc.citation.rank | M22 | |
dc.citation.spage | 73 | |
dc.citation.volume | 567 | |
dc.identifier.doi | 10.1016/j.tca.2013.01.008 | |
dc.identifier.rcub | conv_462 | |
dc.identifier.scopus | 2-s2.0-84884534924 | |
dc.identifier.wos | 000323408100012 | |
dc.type.version | publishedVersion |
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