Superior activity of non-interacting close acidic protons in Al-rich Pt/H-*BEA zeolite in isomerization of n-hexane

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00476872" target="_blank" >RIV/61388955:_____/17:00476872 - isvavai.cz</a>

Alternative codes found

RIV/61388980:_____/17:00476872 RIV/00216275:25310/17:39910588

Result on the web

<a href="http://dx.doi.org/10.1016/j.apcata.2016.12.016" target="_blank" >http://dx.doi.org/10.1016/j.apcata.2016.12.016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcata.2016.12.016" target="_blank" >10.1016/j.apcata.2016.12.016</a>

Result language

angličtina

Original language name

Superior activity of non-interacting close acidic protons in Al-rich Pt/H-*BEA zeolite in isomerization of n-hexane

Original language description

Skeletal isomerization of linear alkanes, an essential reaction for the production of gasoline, relies on environmentally questionable chlorinated catalysts, whose activity exceeds that of alternative zeolite catalysts. This work describes an attempt to understand relations between the local arrangement of active sites and skeletal isomerization of n-hexane in order to adapt the structure of zeolite catalysts to increase the reaction rates. For this purpose, we used a combination of synthesis of zeolites of *BEA structural topology with unique density and distribution of strongly acid sites, analysis of the nature of the acid sites by H-1 MAS NMR spectroscopy and FTIR spectroscopy of the OH groups and adsorbed d(3)-acetonitrile, UV-vis-NIR spectroscopy of carbocations formed by protonization, and kinetic analysis. We demonstrate that the high density of noninteracting but close and strongly acidic structural hydroxyl groups significantly lower the activation barrier in the isomerization reaction compared to far-distant acid sites. The organotemplate-free synthesized Al-rich Pt/H-*BEA zeolite (Si/AI 4.2) with an unparalleled high concentration of the noninteracting close H+ ions balancing the charge of the Al-Si-Al sequences forming a wall between the two channels yields 6 times higher reaction rates compared to state-of-the-art Si-rich Pt/H-zeolite catalysts. (C) 2017 Elsevier B.V. All rights reserved.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10403 - Physical chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Applied Catalysis A - General

ISSN

0926-860X

e-ISSN

—

Volume of the periodical

533

Issue of the periodical within the volume

MAR 2017

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

28-37

UT code for WoS article

000394065300004

EID of the result in the Scopus database

2-s2.0-85009230801