Synthesis and characterization of ceria-supported catalysts for carbon dioxide transformation to diethyl carbonate

Abstract

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The support materials Al₂O₃, SiO₂ and TiO₂ were modified with 16 wt% CeO₂, using two different preparation methods evaporation-impregnation and precipitation-deposition. The synthesized 16 wt% CeO₂-Al₂O₃, 16 wt% CeO₂-SiO₂ and 16 wt% CeO₂-TiO₂ materials were characterized by means of X-ray powder diffraction for the phase purity, scanning electron microscopy for the morphology, nitrogen physisorption to determine the specific surface area and X-ray photo electron spectroscopy for the oxidation state of the Ce in the TiO₂, Al₂O₃ and SiO₂ matrices. Transmission electron microscopy was used to study the particle size of CeO₂ whereas CO₂-temperature programmed desorption (TPD) was used to determine the basicity of ceria-modified TiO₂, Al₂O₃ and SiO₂ catalysts. Furthermore, the catalytic performance of the as prepared CeO₂-modified catalysts were compared in the synthesis of diethyl carbonate starting from ethanol and CO₂ using butylene oxide as the dehydrating agent. The physico-chemical characterization results were correlated with the catalytic activity results and discussed in detail.

Authors:
Leino Ewelina, Kumar Narendra, Mäki-Arvela Päivi, Rautio Anne-Riikka, Dahl Johnny, Roine Jorma, Mikkola Jyri-Pekka

Publication type:
A1 Journal article – refereed

Place of publication:

Keywords:
Carbon dioxide utilization, cerium oxide, diethyl carbonate, heterogeneous catalysis

Published:

Full citation:
Ewelina Leino, Narendra Kumar, Päivi Mäki-Arvela, Anne-Riikka Rautio, Johnny Dahl, Jorma Roine, Jyri-Pekka Mikkola, Synthesis and characterization of ceria-supported catalysts for carbon dioxide transformation to diethyl carbonate, Catalysis Today, Volume 306, 2018, Pages 128-137, ISSN 0920-5861, https://doi.org/10.1016/j.cattod.2017.01.016

DOI:
https://doi.org/10.1016/j.cattod.2017.01.016

Read the publication here:
http://urn.fi/urn:nbn:fi-fe2019052116396