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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
The influence of non-ionic surfactants on electrosynthesis in extended channel, narrow gap electrolysis cells
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 of N-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 H2 gas 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.
Electrolysis, Mass transfer, Gas evolution, Flow reactors, Anodic oxidation, surfactants
1388-2481
6-10
Folgueiras Amador, Ana
080c345d-0a05-406a-bf7c-1939ca9c0aaa
Jolley, Katherine E
c2bbafc9-c814-4183-b56f-6235474ae1d9
Birkin, Peter R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Brown, Richard C.D.
21ce697a-7c3a-480e-919f-429a3d8550f5
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Pickering, Stephen
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Sharabi, Medhat
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De Frutos, Oscar
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Mateos, Carlos
92ec7161-7e84-4eee-82c7-9d14ea77d39f
Rincón, Juan A.
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Folgueiras Amador, Ana
080c345d-0a05-406a-bf7c-1939ca9c0aaa
Jolley, Katherine E
c2bbafc9-c814-4183-b56f-6235474ae1d9
Birkin, Peter R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Brown, Richard C.D.
21ce697a-7c3a-480e-919f-429a3d8550f5
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Pickering, Stephen
99b1ad2c-64b7-4423-810b-d90c8dd22745
Sharabi, Medhat
5978e17d-1a0a-4de4-bb1a-5f2e31fb78ce
De Frutos, Oscar
4f5d355a-0871-4f19-bf0a-cf7e36d82a29
Mateos, Carlos
92ec7161-7e84-4eee-82c7-9d14ea77d39f
Rincón, Juan A.
5c4dac4c-9791-44d8-9ca5-b37da7add758

Folgueiras Amador, Ana, Jolley, Katherine E, Birkin, Peter R., Brown, Richard C.D., Pletcher, Derek, Pickering, Stephen, Sharabi, Medhat, De Frutos, Oscar, Mateos, Carlos and Rincón, Juan A. (2019) The influence of non-ionic surfactants on electrosynthesis in extended channel, narrow gap electrolysis cells. Electrochemistry Communications, 6-10. (doi:10.1016/j.elecom.2019.01.009).

Record type: Article

Abstract

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 of N-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 H2 gas 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.

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Accepted/In Press date: 11 January 2019
e-pub ahead of print date: 14 January 2019
Keywords: Electrolysis, Mass transfer, Gas evolution, Flow reactors, Anodic oxidation, surfactants

Identifiers

Local EPrints ID: 427814
URI: https://eprints.soton.ac.uk/id/eprint/427814
ISSN: 1388-2481
PURE UUID: 3dfef98a-39eb-4ac3-aadd-bdaa190e13f4
ORCID for Katherine E Jolley: ORCID iD orcid.org/0000-0001-6223-9808
ORCID for Peter R. Birkin: ORCID iD orcid.org/0000-0002-6656-4074
ORCID for Richard C.D. Brown: ORCID iD orcid.org/0000-0003-0156-7087

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Date deposited: 29 Jan 2019 17:30
Last modified: 24 Apr 2019 00:36

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