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The crucial role of clay binders in the performance of ZSM-5 based materials for biomass catalytic pyrolysis

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F19%3A00517556" target="_blank" >RIV/61388955:_____/19:00517556 - isvavai.cz</a>

  • Výsledek na webu

    <a href="http://hdl.handle.net/11104/0302887" target="_blank" >http://hdl.handle.net/11104/0302887</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1039/c8cy02116c" target="_blank" >10.1039/c8cy02116c</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    The crucial role of clay binders in the performance of ZSM-5 based materials for biomass catalytic pyrolysis

  • Popis výsledku v původním jazyce

    The effect of the agglomeration of the ZrO2/n-ZSM-5 catalyst with two different clays (bentonite and attapulgite) on lignocellulose catalytic pyrolysis has been investigated. The reaction tests have been carried out with an ex situ configuration of the reaction system, which allowed the thermal and catalytic zones to operate at different temperatures (550 and 400 degrees C, respectively). The behavior of the agglomerated catalysts has been compared with those of the binder-free material and the pure clays. The catalyst samples have been characterized by X-ray diffraction, microscopy, chemical analysis and Ar adsorption measurements, as well as by FTIR of both adsorbed pyridine and CO2 to probe their acid-base properties. The occurrence of synergetic effects between the different catalyst components in the agglomerated materials has been denoted in lignocellulose catalytic pyrolysis. Agglomeration caused opposite effects on the catalyst performance depending on the clay. With bentonite as the binder, the technical catalyst showed a reduced bio-oil deoxygenation activity due to a loss of most of its strong acidity by ion-exchange of Na+ cations from the clay. However, the agglomerated catalyst incorporating attapulgite exhibited an enhanced activity leading to the production of a bio-oil with significantly lower oxygen content. For this system a migration of Mg2+ occurs from the attapulgite towards both the zeolitic and ZrO2 components of the parent catalyst. Although this fact partially decreases the concentration of the zeolite BrOnsted acid sites, it also has a promotion effect on both Lewis acidity and basicity due to the interaction between the migrating Mg2+ species and the ZrO2 phase. As a result, the technical catalyst agglomerated with attapulgite exhibits a well-balanced distribution of acid and basic sites, which is responsible for the remarkable enhancement observed in the bio-oil deoxygenation activity in comparison with the binder-free material.

  • Název v anglickém jazyce

    The crucial role of clay binders in the performance of ZSM-5 based materials for biomass catalytic pyrolysis

  • Popis výsledku anglicky

    The effect of the agglomeration of the ZrO2/n-ZSM-5 catalyst with two different clays (bentonite and attapulgite) on lignocellulose catalytic pyrolysis has been investigated. The reaction tests have been carried out with an ex situ configuration of the reaction system, which allowed the thermal and catalytic zones to operate at different temperatures (550 and 400 degrees C, respectively). The behavior of the agglomerated catalysts has been compared with those of the binder-free material and the pure clays. The catalyst samples have been characterized by X-ray diffraction, microscopy, chemical analysis and Ar adsorption measurements, as well as by FTIR of both adsorbed pyridine and CO2 to probe their acid-base properties. The occurrence of synergetic effects between the different catalyst components in the agglomerated materials has been denoted in lignocellulose catalytic pyrolysis. Agglomeration caused opposite effects on the catalyst performance depending on the clay. With bentonite as the binder, the technical catalyst showed a reduced bio-oil deoxygenation activity due to a loss of most of its strong acidity by ion-exchange of Na+ cations from the clay. However, the agglomerated catalyst incorporating attapulgite exhibited an enhanced activity leading to the production of a bio-oil with significantly lower oxygen content. For this system a migration of Mg2+ occurs from the attapulgite towards both the zeolitic and ZrO2 components of the parent catalyst. Although this fact partially decreases the concentration of the zeolite BrOnsted acid sites, it also has a promotion effect on both Lewis acidity and basicity due to the interaction between the migrating Mg2+ species and the ZrO2 phase. As a result, the technical catalyst agglomerated with attapulgite exhibits a well-balanced distribution of acid and basic sites, which is responsible for the remarkable enhancement observed in the bio-oil deoxygenation activity in comparison with the binder-free material.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    10403 - Physical chemistry

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/GBP106%2F12%2FG015" target="_blank" >GBP106/12/G015: Vývoj nových nanoporézních adsorbentů a katalyzátorů</a><br>

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2019

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název periodika

    Catalysis Science &Technology

  • ISSN

    2044-4753

  • e-ISSN

  • Svazek periodika

    9

  • Číslo periodika v rámci svazku

    3

  • Stát vydavatele periodika

    GB - Spojené království Velké Británie a Severního Irska

  • Počet stran výsledku

    14

  • Strana od-do

    789-802

  • Kód UT WoS článku

    000459731200023

  • EID výsledku v databázi Scopus

    2-s2.0-85061181183