Li Mengran, Yang Kailun, Abdinejad Maryam, Zhao Chuan, Burdyny Thomas
Materials for Energy Conversion and Storage (MECS), Department of Chemical Engineering, the Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, The Netherlands.
School of Chemistry, The University of New South Wales, Sydney, 2052, New South Wales, Australia.
Nanoscale. 2022 Aug 25;14(33):11892-11908. doi: 10.1039/d2nr03310k.
Carbon dioxide (CO) electrolysis is a promising route to utilise captured CO as a building block to produce valuable feedstocks and fuels such as carbon monoxide and ethylene. Very recently, CO electrolysis has been proposed as an alternative process to replace the amine recovery unit of the commercially available amine-based CO capture process. This process would replace the most energy-intensive unit operation in amine scrubbing while providing a route for CO conversion. The key enabler for such process integration is to develop an efficient integrated electrolyser that can convert CO and recover the amine simultaneously. Herein, this review provides an overview of the fundamentals and recent progress in advancing integrated CO conversion in amine-based capture media. This review first discusses the mechanisms for both CO absorption in the capture medium and electrochemical conversion of the absorbed CO. We then summarise recent advances in improving the efficiency of integrated electrolysis innovating electrodes, tailoring the local reaction environment, optimising operation conditions (, temperatures and pressures), and modifying cell configurations. This review is concluded with future research directions for understanding and developing integrated CO electrolysers.
二氧化碳（CO₂）电解是一种很有前景的途径，可利用捕获的CO₂作为原料来生产有价值的原料和燃料，如一氧化碳和乙烯。最近，有人提出将CO₂电解作为一种替代工艺，以取代市售基于胺的CO₂捕获工艺中的胺回收单元。该工艺将取代胺洗涤中最耗能的单元操作，同时提供一条CO₂转化的途径。这种工艺集成的关键推动因素是开发一种高效的集成电解槽，它可以同时转化CO₂并回收胺。在此，本综述概述了在基于胺的捕获介质中推进集成CO₂转化的基本原理和最新进展。本综述首先讨论了捕获介质中CO₂吸收的机制以及吸收的CO₂的电化学转化。然后，我们总结了在提高集成电解效率方面的最新进展，包括创新电极、调整局部反应环境、优化操作条件（如温度和压力）以及改进电池配置。本综述最后给出了理解和开发集成CO₂电解槽的未来研究方向。
