Electrons-2-Chemicals - E2C

Publications

Journal of CO2 Utilization, 37, 2020, 295-308

Sorption enhanced dimethyl ether synthesis for high efficiency carbon conversion: Modelling and cycle design

Jasper van Kampena,b, Jurriaan Boona,b, Jaap Ventea, Martin van Sint Annalandb

a Sustainable Process Technology, ECN part of TNO, P.O. Box 15, 1755ZG Petten, the Netherlands
b Chemical Process Intensification, TU/e, P.O. Box 513, 5600MB Eindhoven, the Netherlands
 

https://doi.org/10.1016/j.jcou.2019.12.021

Abstract

Dimethyl ether is one of the most promising alternative fuels under consideration worldwide. Both the conventional indirect DME synthesis and the improved direct DME synthesis process are constrained by thermodynamics, which results in limited product yield, extensive separations and large recycle streams. Sorption enhanced DME synthesis is a novel process for the production of DME. The in situ removal of H2O ensures that the oxygen surplus of the feed no longer ends up in CO2 as is the case for direct DME synthesis. As a result CO2 can be converted directly to DME with high carbon efficiency, rather than being the main byproduct of DME production.

The sorption enhanced DME synthesis process is a promising intensification, already achieving over 80 % single-pass CO2 conversion for a non-optimized system. The increased single-pass conversion requires less downstream separation and smaller recycle streams, especially for a CO2-rich feed. A key optimization parameter for the process performance is the adsorption capacity of the system. This capacity can be improved by optimizing the reactive adsorption conditions and the regeneration procedure. In this work, a detailed modelling study is performed to investigate the impact of various process parameters on the operating window and the interaction between different steps in a complete sorption enhanced DME synthesis cycle, and to compare its performance to other direct DME synthesis processes. The development of sorption enhanced DME synthesis, with its high efficiency carbon conversion, could play a significant role in the energy transition in which the carbon conversion will become leading.

ChemPhysChem, 2019, 20, 2926

Electrolyte Effects on the Electrochemical Reduction of CO2

Marilia Moura de Salles Pupoa, Ruud Kortlevera

a Department of Process & Energy Faculty of Mechanical, Maritime & Materials Engineering, Delft University of Technology, Leeghwaterstraat 39, 2628 CB Delft, The, Netherlands

 

https://doi.org/10.1002/cphc.201900680

Abstract

The electrochemical reduction of CO2 to fuels or commodity chemicals is a reaction of high interest for closing the anthropogenic carbon cycle. The role of the electrolyte is of particular interest, as the interplay between the electrocatalytic surface and the electrolyte plays an important role in determining the outcome of the CO2 reduction reaction. Therefore, insights on electrolyte effects on the electrochemical reduction of CO2 are pivotal in designing electrochemical devices that are able to efficiently and selectively convert CO2 into valuable products. Here, we provide an overview of recently obtained insights on electrolyte effects and we discuss how these insights can be used as design parameters for the construction of new electrocatalytic systems.

Current Opinion in Green and Sustainable Chemistry, 16, April 2019, 47-56

Recent advances in industrial CO2 electroreduction

Oriol Gutiérrez Sánchez1,2, Yuvraj Y. Birdja1, Metin Bulut1, Jan Vaes1, Tom Breugelmans1,2, Deepak Pant1

1 Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, Mol 2400, Belgium
2 University of Antwerp, Research Group Advanced Reactor Technology, Universiteitsplein 1, 2610 Wilrijk, Belgium

 

https://doi.org/10.1016/j.cogsc.2019.01.005

Abstract

In light of the energy transition, electrochemical CO2 reduction (CO2R) has commonly been postulated as a favorable strategy for renewable energy storage and electrification of the chemical industry. However, for an effective impact of CO2R, large-scale implementation of this technology is required. The majority of research in this field has focused on fundamental and mechanistic understanding of the CO2R reaction and on the development of highly active and selective catalytic materials. Herein, we review the current status of the technology and discuss very recent developments and remaining challenges from an industrial perspective. We underscore the importance of system-level investigation and optimization of CO2R aimed at industrialization of the technology.

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