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IR Operando Study of Ethanol Dehydration over MFI Zeolites: Structure-Activity Relationships

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F18%3A00506518" target="_blank" >RIV/61388955:_____/18:00506518 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216208:11310/18:10386117

  • Result on the web

    <a href="http://hdl.handle.net/11104/0297751" target="_blank" >http://hdl.handle.net/11104/0297751</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1021/acs.jpcc.8b05697" target="_blank" >10.1021/acs.jpcc.8b05697</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    IR Operando Study of Ethanol Dehydration over MFI Zeolites: Structure-Activity Relationships

  • Original language description

    The effect of MFI zeolite morphology (2D-nanosheets vs conventional 3D structure) on ethanol dehydration was probed by FTIR operando spectroscopy. Simultaneous examination of turnover rates and Bronsted acid sites coverage under different reaction conditions allowed determining activation energies for monomolecular and bimolecular dehydration pathways, as well as thermodynamic parameters (Delta H-ads and Delta S-ads) for the adsorption of the most abundant surface species (i.e., ethanol monomers and dimers). The catalytic results showed smaller first-order activation energy (E-first) for 2D-MFI (E-first = 16 +/- 4 kJ mor(-1)) nanosheets vs 3D-MFI (E-first = 41 +/- 1 kJ mol(-1)) and similar zero-order activation energies (E-zero) for both 2D-(E-zero = 117 +/- 4 kJ mol(-1)) and 3D-MFI (E-zero = 124 +/- 1 kJ mol(-1)). Correlating the kinetic and thermodynamic parameters revealed that the different in stabilization of adsorbed ethanol monomers and dimers is the origin behind the differences in the intrinsic activities of 2D- and 3D-MFI zeolites which is refected in the corresponding zero-order activation entropies (Delta S-zero(double dagger)).

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10403 - Physical chemistry

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2018

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Journal of Physical Chemistry C

  • ISSN

    1932-7447

  • e-ISSN

  • Volume of the periodical

    122

  • Issue of the periodical within the volume

    42

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    13

  • Pages from-to

    24055-24067

  • UT code for WoS article

    000448754300026

  • EID of the result in the Scopus database

    2-s2.0-85054870284