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H-ZSM-5 Zeolite Model Crystals: Structure-Diffusion-Activity Relationship in Methanol-to-Olefins Catalysis.
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SYSNO ASEP 0469242 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název H-ZSM-5 Zeolite Model Crystals: Structure-Diffusion-Activity Relationship in Methanol-to-Olefins Catalysis. Tvůrce(i) Losch, P. (FR)
Pinar, A.B. (CH)
Willinger, M.G. (DE)
Soukup, Karel (UCHP-M) RID, SAI, ORCID
Chavan, S. (NO)
Vincent, B. (FR)
Pale, P. (FR)
Louis, B. (FR)Zdroj.dok. Journal of Catalysis. - : Elsevier - ISSN 0021-9517
Roč. 345, JAN 1 (2017), s. 11-23Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova zeolite ; methanol-to-olefins (MTO) ; model catalyst Vědní obor RIV CI - Průmyslová chemie a chemické inženýrství Obor OECD Chemical process engineering Institucionální podpora UCHP-M - RVO:67985858 UT WOS 000393529600002 EID SCOPUS 85002376228 DOI 10.1016/j.jcat.2016.11.005 Anotace Large ZSM-5 zeolite crystals synthesized in fluoride medium show an astonishing activity, stability as well as selectivity towards light olefins in the Methanol-To-Olefins (MTO) reaction. By proper control of the synthesis parameters, ZSM-5 single crystals of unprecedented high quality are produced. The absence of usually uncontrollable variables such as structural defects, external non selective surface acid sites and extra-framework aluminium (EFAl) species was evidenced by SEM, HRTEM, CO-FTIR, 27Al and 19F MAS-NMR, Rietveld structure refinement and N2- and Ar-gas sorption measurements. Interestingly, diffusivity evaluation of different probe molecules (toluene, benzene and neopentane) has been carried out with PFG-NMR, allowing casting light on an interesting structure-diffusion-activity relationship. A levitation effect could be experimentally demonstrated and its impact on catalysis is highlighted in a rationalization attempt: Maxwell-Boltzmann based diffusion models properly predict product distributions for this counter-intuitively outstanding Methanol-To-Propylene (MTP) catalyst. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2017
Počet záznamů: 1