三室太阳能电解槽气相阴极利用地球上丰富的金属从二氧化碳和水生产甲酸的演示

IF 2.5 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Frontiers in chemical engineering Pub Date : 2022-11-09 DOI:10.3389/fceng.2022.1028811
B. Thijs, Lucas Hanssens, G. Heremans, Wauter Wangermez, J. Rongé, J. Martens
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引用次数: 1

摘要

采用锡铜泡沫阴极和镍铁阳极构建了三室太阳能甲酸发生器。在阳极和中间隔间之间安装了Fumasep FAD-PET-75和Nafion 117膜的双极组合,其中填充了Amberlyst 15H离子交换珠。一层Fumasep FAD-PET-75膜将中间隔室与阴极隔开。发电机由光伏板供电,并以气态二氧化碳和水为燃料。稀释甲酸溶液是通过流动的水通过中间隔间。普通的PV-EC装置使用水性电解质并产生水性甲酸盐。在我们的PV-EC装置中,甲酸直接产生,避免了下游操作将甲酸转化为甲酸的需要。该电解槽与太阳能光伏电池相匹配,耦合效率高达95%。我们的装置产生甲酸的法拉第效率约为31%,太阳能制甲酸效率约为2%。通过从二氧化碳和水中生产甲酸而不需要任何额外的化学物质,这种电解器的概念对于在太阳能丰富的偏远地区使用是有吸引力的。甲酸可作为液体可再生燃料或化学构件。
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Demonstration of a three compartment solar electrolyser with gas phase cathode producing formic acid from CO2 and water using Earth abundant metals
A three compartment solar formic acid generator was built using a Sn on Cu foam cathode and NiFe anode. A bipolar combination of a Fumasep FAD-PET-75 and Nafion 117 membrane was mounted between anode and middle compartment, which was filled with Amberlyst 15H ion exchanger beads. A Fumasep FAD-PET-75 membrane separated the middle compartment from the cathode. The generator was powered with a photovoltaic panel and fed with gaseous CO2 and water. Diluted formic acid solution was produced by flowing water through the middle compartment. Common PV-EC devices are operated using aqueous electrolyte and produce aqueous formate. In our PV-EC device, formic acid is produced straight away, avoiding the need for downstream operations to convert formate to formic acid. The electrolyser was matched with solar photovoltaic cells achieving a coupling efficiency as high as 95%. Our device produces formic acid at a faradaic efficiency of ca. 31% and solar-to-formic acid efficiency of ca. 2%. By producing formic acid from CO2 and water without any need of additional chemicals this electrolyser concept is attractive for use at remote locations with abundant solar energy. Formic acid serves as a liquid renewable fuel or chemical building block.
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CiteScore
3.50
自引率
0.00%
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审稿时长
13 weeks
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