The influence of non-ionic surfactants on electrosynthesis in extended channel, narrow gap electrolysis cells

The influence of non-ionic surfactants on electrosynthesis in extended channel, narrow gap electrolysis cells
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非离子表面活性剂对长通道窄间隙电解槽电合成的影响

DOI:
10.1016/j.elecom.2019.01.009
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发表时间:
2019
影响因子:
5.4
通讯作者:
Folgueiras-Amador A
Folgueiras-Amador A
中科院分区:
工程技术3区
文献类型:
--
作者:
Folgueiras-Amador A

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结果表明,在电解质介质中添加非离子表面活性剂(Triton X-100 或 Brij L23)可显着提高水平电解池(具有水平、延长的通道长度和窄电极间间隙(Ammonite 8))中 N-甲酰吡咯烷甲氧基化的电流效率。在存在 Brij L23 的情况下,分数电流效率大大提高并接近 1.0,同时在单程中以非常高的转换率保持 0.99 的分数选择性。电流效率的提高归因于对电极处产生的氢气气泡尺寸的减小,从而导致通过毫米尺寸的扩展通道的流动流中的质量传输状态的增强。
It is demonstrated that the addition of a non-ionic surfactant (Triton X-100 or Brij L23) to the electrolyte medium leads to a significant improvement to the current efficiency for the methoxylation ofN-formylpyrrolidine in a flow electrolysis cell with a horizontal, extended channel length and narrow interelectrode gap (the Ammonite 8). In the presence of Brij L23, the fractional current efficiency is much improved and approaches 1.0 while maintaining a fractional selectivity of 0.99 at a very high conversion in a single pass. The improvement in current efficiency is ascribed to a decrease in the bubble size of the H2gas evolved at the counter electrode leading to an enhancement in the mass transport regime in the flow stream through the extended channel with millimetre dimensions.
气泡柱表面活性剂溶液中气泡尺寸的实验测定
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