Publication

Current efficiency losses in indirect electrochemical processing

Christos Comninellis
1987
Journal Articles

Abstract

In this process a carrier (Mn+) is electrochem. oxidized (or reduced) and then allowed to react with the org. compd. in a sep. vessel. When the reaction is complete a sepn. of product is made and the spent liquor is returned to the electrochem. cell where the carrier is regenerated. The loss of current efficiency (CE) using the Mn2+/Mn3+ system in 88% H2SO4 was due to the oxidn. of the org. compd. (mainly to CO2) carried over with the electrolyte back to the cell. The study was extended to 50% H2SO4 and a simple relation proposed which permits the calcn. of the loss in CE from the total org. C present in the recycled electrolyte. The oxidn. of PhMe and its derivs. to the corresponding benzaldehydes was carried out with electrogenerated Mn2(SO4)3 in H2SO4. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/8c033d58-3aee-428d-8209-a61253646855

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Christos Comninellis
1987
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/8c033d58-3aee-428d-8209-a61253646855

About this result

Related concepts (32)

Alum

An alum (ˈæləm) is a type of chemical compound, usually a hydrated double sulfate salt of aluminium with the general formula XAl(SO4)2·12 H2O, where X is a monovalent cation such as potassium or ammonium. By itself, "alum" often refers to potassium alum, with the formula KAl(SO4)2·12 H2O. Other alums are named after the monovalent ion, such as sodium alum and ammonium alum. The name "alum" is also used, more generally, for salts with the same formula and structure, except that aluminium is replaced by another trivalent metal ion like chromium^III, and/or sulfur is replaced by another chalcogen like selenium.

Oxidizing agent

An oxidizing agent (also known as an oxidant, oxidizer, electron recipient, or electron acceptor) is a substance in a redox chemical reaction that gains or "accepts"/"receives" an electron from a (called the , , or ). In other words, an oxidizer is any substance that oxidizes another substance. The oxidation state, which describes the degree of loss of electrons, of the oxidizer decreases while that of the reductant increases; this is expressed by saying that oxidizers "undergo reduction" and "are reduced" while reducers "undergo oxidation" and "are oxidized".

Faraday efficiency

In electrochemistry, Faraday efficiency (also called faradaic efficiency, faradaic yield, coulombic efficiency or current efficiency) describes the efficiency with which charge (electrons) is transferred in a system facilitating an electrochemical reaction. The word "Faraday" in this term has two interrelated aspects: first, the historic unit for charge is the faraday (F), but has since been replaced by the coulomb (C); and secondly, the related Faraday's constant (F) correlates charge with moles of matter and electrons (amount of substance).

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Current efficiency losses in indirect electrochemical processing

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