Electrochemical Conversion of CO2 to CO into a Microchannel Reactor System in the Case of Aqueous Electrolyte

Fanghua Zhang; Zhichao Jin; Chengzhen Chen; Yanling Tang; Samah A. Mahyoub; Shenglin Yan; Zhenmin Cheng

doi:10.1021/acs.iecr.9b07014

Electrochemical Conversion of CO₂ to CO into a Microchannel Reactor System in the Case of Aqueous Electrolyte

Fanghua Zhang, Zhichao Jin, Chengzhen Chen, Yanling Tang, Samah A. Mahyoub, Shenglin Yan, Zhenmin Cheng^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

A microchannel electrochemical reactor system was designed to facilitate the reduction of CO₂ to CO, which is composed of a premixing section in the upstream consisting of a circular microchannel for the presaturation of CO₂ in the electrolyte and a reacting section in the downstream consisting of an annular microchannel containing a Ag rod as the catalyst. Such a combined structure exhibited an ultrahigh CO faradaic efficiency of 95.3% due to the efficient mass transfer under Taylor flow. It is interesting to find that CO₂ conversion was increased from 0.94 to 3.66% when the length of the microchannel was increased by connection in series due to the prolonged contacting time between CO₂ and the electrocatalyst. Furthermore, "scale-up" experiments demonstrated that the faradaic efficiency for CO could keep all above 95.0% at a current density of 7.5

Original language	English
Pages (from-to)	5664-5674
Number of pages	11
Journal	Industrial and Engineering Chemistry Research
Volume	59
Issue number	13
DOIs	https://doi.org/10.1021/acs.iecr.9b07014
State	Published - 1 Apr 2020
Externally published	Yes

Bibliographical note

Publisher Copyright:
Copyright © 2020 American Chemical Society.

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acs.iecr.9b07014

Cite this

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abstract = "A microchannel electrochemical reactor system was designed to facilitate the reduction of CO2 to CO, which is composed of a premixing section in the upstream consisting of a circular microchannel for the presaturation of CO2 in the electrolyte and a reacting section in the downstream consisting of an annular microchannel containing a Ag rod as the catalyst. Such a combined structure exhibited an ultrahigh CO faradaic efficiency of 95.3% due to the efficient mass transfer under Taylor flow. It is interesting to find that CO2 conversion was increased from 0.94 to 3.66% when the length of the microchannel was increased by connection in series due to the prolonged contacting time between CO2 and the electrocatalyst. Furthermore, {"}scale-up{"} experiments demonstrated that the faradaic efficiency for CO could keep all above 95.0% at a current density of 7.5",

author = "Fanghua Zhang and Zhichao Jin and Chengzhen Chen and Yanling Tang and Mahyoub, {Samah A.} and Shenglin Yan and Zhenmin Cheng",

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AU - Zhang, Fanghua

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AU - Mahyoub, Samah A.

AU - Yan, Shenglin

AU - Cheng, Zhenmin

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