H-ZSM-5 Zeolite Model Crystals: Structure-Diffusion-Activity Relationship in Methanol-to-Olefins Catalysis.

Losch, P.; Pinar, A.B.; Willinger, M.G.; Soukup, Karel; Chavan, S.; Vincent, B.; Pale, P.; Louis, B.

doi:https://dx.doi.org/10.1016/j.jcat.2016.11.005

Number of the records: 1

H-ZSM-5 Zeolite Model Crystals: Structure-Diffusion-Activity Relationship in Methanol-to-Olefins Catalysis.

1.

SYSNO ASEP	0469242
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	H-ZSM-5 Zeolite Model Crystals: Structure-Diffusion-Activity Relationship in Methanol-to-Olefins Catalysis.
Author(s)	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)
Source Title	Journal of Catalysis. - : Elsevier - ISSN 0021-9517 Roč. 345, JAN 1 (2017), s. 11-23
Number of pages	13 s.
Language	eng - English
Country	US - United States
Keywords	zeolite ; methanol-to-olefins (MTO) ; model catalyst
Subject RIV	CI - Industrial Chemistry, Chemical Engineering
OECD category	Chemical process engineering
Institutional support	UCHP-M - RVO:67985858
UT WOS	000393529600002
EID SCOPUS	85002376228
DOI	10.1016/j.jcat.2016.11.005
Annotation	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.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2017

Number of the records: 1