Boosting Dimethyl Carbonate Production from CO2 and Methanol using Ceria‐Ionic Liquid Catalyst

Author:

Asare‐Bediako Bernard Baffour1ORCID,Li Mi1ORCID,Houston Austin2ORCID,Vilmercati Paolo34ORCID,Mannella Norman34ORCID,Labbé Nicole1ORCID,Abdoulmoumine Nourredine15ORCID

Affiliation:

1. Center for Renewable Carbon University of Tennessee 2506 Jacob Drive 37996 Knoxville TN USA

2. Department of Materials Science and Engineering University of Tennessee 2506 Jacob Drive 37996 Knoxville TN USA

3. Department of Physics and Astronomy The University of Tennessee Knoxville 1408 Circle Drive 37996 Knoxville TN USA

4. Institute for Advanced Materials and Manufacturing 2641 Osprey Vista Way 37920 Knoxville TN USA

5. Department of Biosystems Engineering and Soil Science University of Tennessee 2506 E.J. Chapman Drive 37996 Knoxville TN USA

Abstract

AbstractAs a crucial strategy towards a sustainable chemical industry, the direct synthesis of dimethyl carbonate (DMC) from renewable carbon dioxide (CO2) and methanol (MeOH) is studied using CeO2 nanoparticles modified with 1‐butyl‐3‐methylimidazolium hydrogen carbonate ([BMIm][HCO3]) devoid of stoichiometric dehydrating agents. The synthesized CeO2@[BMIm][HCO3] catalyst having high thermal stability harnesses the unique physicochemical properties of CeO2 and the ionic liquid to exhibit a DMC yield of 10.4 % and a methanol conversion of 16.1 % at optimal conditions (pressure of CO2=5 MPa; temperature=130 °C). The catalytic behavior of CeO2@[BMIm][HCO3] studied with a detailed XRD, XPS, CO2 and NH3‐TPD, Raman spectroscopy, TGA, FTIR, SEM and TEM suggests that the synergy between the two catalytic components originating from an increased surface oxygen vacancies boosts the overall catalytic performance. After several recycling tests, the catalyst demonstrated no significant reduction in DMC yield and methanol conversion. This platform is an attractive approach to synthesize thermally stable nanoparticle@ionic liquid that retains and merges the physical attributes of both materials for producing useful bulk chemicals from readily available chemical resources.

Funder

University of Tennessee

Agricultural Research Service

Publisher

Wiley

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