In Situ FT-IR Characterization of CuZnZr/Ferrierite Hybrid Catalysts for One-Pot CO2-to-DME Conversion

Materials

Francesco Frusteri¹  Giuseppe Bonura¹  Enrico Catizzone²  Girolamo Giordano²  Massimo Migliori²  Leonardo Marchese³  Ivana Miletto³  Chiara Ivaldi³  Enrica Gianotti³ 

[1] CNR-ITAE, Istituto di Tecnologie Avanzate per l’Energia “Nicola Giordano”, via S. Lucia sopra Contesse 5, 98126 Messina, Italy;Dipartimento di Ingegneria per l’Ambiente e il Territorio e Ingegneria Chimica, Università della Calabria, via P. Bucci, 87036 Rende, Italy;Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale “Amedeo Avogadro”, Viale Teresa Michel, 11. 15100 Alessandria, Italy;

关键词: CO₂ hydrogenation;    dimethyl ether;    Cu‒ZnO‒ZrO₂;    ferrierite zeolite;    catalyst deactivation;    zeolite Brønsted/Lewis acidity;    FTIR;   

DOI  :  10.3390/ma11112275

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown