Bench-scale electrochemical system for generation of CO and syn-gas

被引：126

作者：

Dufek, Eric J. ^{[1
]}

Lister, Tedd E. ^{[1
]}

McIlwain, Michael E. ^{[1
]}

机构：

[1] Idaho Natl Lab, Idaho Falls, ID 83415 USA

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2011年 / 41卷 / 06期

关键词：

Carbon dioxide reduction; Gas diffusion electrode; Syn-gas; Energy storage; Energy conversion; Electrolysis; Load-leveling; CARBON-DIOXIDE; METAL-ELECTRODES; DIMETHYL ETHER; DIFFUSION ELECTRODES; LOW-TEMPERATURE; REDUCTION; SELECTIVITY; CATHODES; METHANE; MEDIA;

D O I：

10.1007/s10800-011-0271-6

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A flow cell based, bench-scale electrochemical system for generation of synthesis-gas (syn-gas) is reported. Sensitivity to operating conditions such as CO(2) flow, current density, and elevated temperature are described. By increasing the temperature of the cell the kinetic overpotential for the reduction of CO(2) was lowered with the cathode voltage at 70 mA cm(-2) decreased by 0.32 V and the overall cell voltage dropping by 1.57 V. This equates to an 18% increase in cell efficiency. By closely monitoring the products it was found that at room temperature and 70 A degrees C the primary products are CO and H(2). By controlling the current density and the flow of CO(2) it was possible to control the H(2):CO product ratio between 1:4 and 9:1. The reproducibility of performing experiments at elevated temperature and the ability to generate syn-gas for extended periods of time is also discussed.

引用

页码：623 / 631

页数：9

共 25 条

[1] ELECTROCHEMICAL REDUCTION OF CARBON-DIOXIDE ON VARIOUS METAL-ELECTRODES IN LOW-TEMPERATURE AQUEOUS KHCO3 MEDIA [J].