IR Operando study of ethanol dehydration over MFI zeolite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F18%3A00506558" target="_blank" >RIV/61388955:_____/18:00506558 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/18:10386114

Výsledek na webu

<a href="http://hdl.handle.net/11104/0297792" target="_blank" >http://hdl.handle.net/11104/0297792</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2017.09.020" target="_blank" >10.1016/j.cattod.2017.09.020</a>

Jazyk výsledku

angličtina

Název v původním jazyce

IR Operando study of ethanol dehydration over MFI zeolite

Popis výsledku v původním jazyce

Zeolite-catalyzed dehydration of ethanol is an attractive economically feasible route for production of ethylene and butenes. The goal of this contribution is to monitor the intermediate species on the surface of ´´working´´ catalyst to rationalize the influence of the reaction conditions and zeolite characteristics on the dehydration pathways. With this respect the rates of diethyl ether (DEE) and ethylene formation in ethanol dehydration along with the quantification of the surface-intermediates (ethanol monomer and dimer) were simultaneously assessed under different reaction conditions in H-MFI zeolite. The reaction conditions (pressure, temperature, and ethanol conversion) control the population of surface intermediates and hence determine the dominant reaction mechanism. The results support the prevalence of dimer-assisted etherification at high ethanol pressures and enhanced contribution of ethoxide-mediated route with increasing the temperature. At high conversion, the DEE decomposition route producing ethylene was confirmed for H-MFI at 488 K along with ethoxide-mediated pathway.

Název v anglickém jazyce

IR Operando study of ethanol dehydration over MFI zeolite

Popis výsledku anglicky

Zeolite-catalyzed dehydration of ethanol is an attractive economically feasible route for production of ethylene and butenes. The goal of this contribution is to monitor the intermediate species on the surface of ´´working´´ catalyst to rationalize the influence of the reaction conditions and zeolite characteristics on the dehydration pathways. With this respect the rates of diethyl ether (DEE) and ethylene formation in ethanol dehydration along with the quantification of the surface-intermediates (ethanol monomer and dimer) were simultaneously assessed under different reaction conditions in H-MFI zeolite. The reaction conditions (pressure, temperature, and ethanol conversion) control the population of surface intermediates and hence determine the dominant reaction mechanism. The results support the prevalence of dimer-assisted etherification at high ethanol pressures and enhanced contribution of ethoxide-mediated route with increasing the temperature. At high conversion, the DEE decomposition route producing ethylene was confirmed for H-MFI at 488 K along with ethoxide-mediated pathway.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Catalysis Today

ISSN

0920-5861

e-ISSN

—

Svazek periodika

304

Číslo periodika v rámci svazku

APR 2018

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

51-57

Kód UT WoS článku

000425179000007

EID výsledku v databázi Scopus

2-s2.0-85029531486