In situ FT-IR characterization of CuZnZr/ferrierite hybrid catalysts for one-pot CO2-to-DME conversion

Ivana Miletto; Enrico Catizzone; Giuseppe Bonura; Chiara Ivaldi; Massimo Migliori; Enrica Gianotti; Leonardo Marchese; Francesco Frusteri; Girolamo Giordano

doi:10.3390/ma11112275

In situ FT-IR characterization of CuZnZr/ferrierite hybrid catalysts for one-pot CO₂-to-DME conversion

Ivana Miletto, Enrico Catizzone, Giuseppe Bonura, Chiara Ivaldi, Massimo Migliori, Enrica Gianotti, Leonardo Marchese, Francesco Frusteri, Girolamo Giordano

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

CO₂ hydrogenation to dimethyl ether (DME) is a promising strategy to drive the current chemical industry towards a low-carbon scenario since DME can be used as an eco-friendly fuel as well as a platform molecule for chemical production. A Cu-ZnO-ZrO₂/ferrierite (CZZ/FER) hybrid grain was recently proposed as a catalyst for CO₂-to-DME one-pot conversion exhibiting high DME productivity thanks to the unique shape-selectivity offered by ferrierite zeolite. Nevertheless, such a catalyst deactivates but no direct evidence has been reported of activity loss over time. In this work, CZZ/FER catalysts with different acidity levels were characterized with the FTIR technique before and after reactions, aiming to give new insights about catalyst deactivation. Results show that activity loss can be related to both (i) copper particle sintering, which decreases CO₂ activation towards methanol, and (ii) acidity loss due to H⁺/Cu²⁺ ion exchange.

Lingua originale	Inglese
Numero di articolo	2275
Rivista	Materials
Volume	11
Numero di pubblicazione	11
DOI	https://doi.org/10.3390/ma11112275
Stato di pubblicazione	Pubblicato - 14 nov 2018

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10.3390/ma11112275

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title = "In situ FT-IR characterization of CuZnZr/ferrierite hybrid catalysts for one-pot CO2-to-DME conversion",

abstract = "CO2 hydrogenation to dimethyl ether (DME) is a promising strategy to drive the current chemical industry towards a low-carbon scenario since DME can be used as an eco-friendly fuel as well as a platform molecule for chemical production. A Cu-ZnO-ZrO2/ferrierite (CZZ/FER) hybrid grain was recently proposed as a catalyst for CO2-to-DME one-pot conversion exhibiting high DME productivity thanks to the unique shape-selectivity offered by ferrierite zeolite. Nevertheless, such a catalyst deactivates but no direct evidence has been reported of activity loss over time. In this work, CZZ/FER catalysts with different acidity levels were characterized with the FTIR technique before and after reactions, aiming to give new insights about catalyst deactivation. Results show that activity loss can be related to both (i) copper particle sintering, which decreases CO2 activation towards methanol, and (ii) acidity loss due to H+/Cu2+ ion exchange.",

keywords = "CO hydrogenation, Catalyst deactivation, Cu-ZnO-ZrO, Dimethyl ether, FTIR, Ferrierite zeolite, Zeolite Br{\o}nsted/Lewis acidity",

author = "Ivana Miletto and Enrico Catizzone and Giuseppe Bonura and Chiara Ivaldi and Massimo Migliori and Enrica Gianotti and Leonardo Marchese and Francesco Frusteri and Girolamo Giordano",

note = "Publisher Copyright: {\textcopyright} 2018 by the authors.",

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AU - Miletto, Ivana

AU - Catizzone, Enrico

AU - Bonura, Giuseppe

AU - Ivaldi, Chiara

AU - Migliori, Massimo

AU - Gianotti, Enrica

AU - Marchese, Leonardo

AU - Frusteri, Francesco

AU - Giordano, Girolamo

PY - 2018/11/14

Y1 - 2018/11/14

N2 - CO2 hydrogenation to dimethyl ether (DME) is a promising strategy to drive the current chemical industry towards a low-carbon scenario since DME can be used as an eco-friendly fuel as well as a platform molecule for chemical production. A Cu-ZnO-ZrO2/ferrierite (CZZ/FER) hybrid grain was recently proposed as a catalyst for CO2-to-DME one-pot conversion exhibiting high DME productivity thanks to the unique shape-selectivity offered by ferrierite zeolite. Nevertheless, such a catalyst deactivates but no direct evidence has been reported of activity loss over time. In this work, CZZ/FER catalysts with different acidity levels were characterized with the FTIR technique before and after reactions, aiming to give new insights about catalyst deactivation. Results show that activity loss can be related to both (i) copper particle sintering, which decreases CO2 activation towards methanol, and (ii) acidity loss due to H+/Cu2+ ion exchange.

AB - CO2 hydrogenation to dimethyl ether (DME) is a promising strategy to drive the current chemical industry towards a low-carbon scenario since DME can be used as an eco-friendly fuel as well as a platform molecule for chemical production. A Cu-ZnO-ZrO2/ferrierite (CZZ/FER) hybrid grain was recently proposed as a catalyst for CO2-to-DME one-pot conversion exhibiting high DME productivity thanks to the unique shape-selectivity offered by ferrierite zeolite. Nevertheless, such a catalyst deactivates but no direct evidence has been reported of activity loss over time. In this work, CZZ/FER catalysts with different acidity levels were characterized with the FTIR technique before and after reactions, aiming to give new insights about catalyst deactivation. Results show that activity loss can be related to both (i) copper particle sintering, which decreases CO2 activation towards methanol, and (ii) acidity loss due to H+/Cu2+ ion exchange.

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KW - Catalyst deactivation

KW - Cu-ZnO-ZrO

KW - Dimethyl ether

KW - FTIR

KW - Ferrierite zeolite

KW - Zeolite Brønsted/Lewis acidity

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M3 - Article

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