CARBOXYLIC ACIDS ELECTROOXIDATION ON SHUNGITE ELECTRODE
Journal Title: Вісник Національного Авіаційного Університету - Year 2017, Vol 70, Issue 1
Abstract
Purpose: This article discusses the electrochemical method of directional conversion of carboxylic acids, which are the most aggressive hydrocarbons oxidation products back into the corresponding hydrocarbons. Existing methods for the regeneration of waste petroleum oils have significant drawbacks, which include the formation of new hard-reclaimed waste and loss of a significant part of the oil during regeneration. Methods: Electrooxidation processes of carboxylic acid on various electrode materials: platinum, graphite and shungite anodes were studied. Results: Potentiostatic polarization curves with simultaneous measurement of near-electrode solution pH showed differences in the process on these anode materials: dimer yield for Kolbe is decreased under the transition from platinum to shungite. At potentials higher than 2.0 v, carboxylic acid has a higher adsorbability compared to water. Therefore Faraday’s side-process of water oxidation doesn’t almost occur, which contributes to high yield of expected product according to current. Electrolysis of carboxylic acids solutions under controlled potential (2.0 and 2.4 V) and chromatographic analysis of the formed products showed that along with the dimeric structures formation for Kolbe reaction, the occurrence of a hydrocarbons mixture takes place, which may be the result of disproportionation of hydrocarbon radicals (alkane and alkene ) and hydrocarbons of isomeric structure, by further oxidation of the hydrocarbon radical to carbocation and its subsequent transformation into the corresponding saturated and unsaturated isomers. Such statement is not supported by conception of the process of one- and two-electron carboxylic acid oxidation. Discussion: General carboxylic acid oxidation scheme according to one-electron mechanism (dimerization and disproportionation of the radical) and twoelectron mechanism (formation and carbocation rearrangement) is proposed. The formation of hydrocarbons under carboxylic acid electrooxidation of waste oils during their regeneration can promote the increase of oil yield without formation of dangerous by-products.
Authors and Affiliations
Oleksandr Davydenko, Volodymyr Ledovskykh
Keywords
Related Articles
- EP ID EP459719
- DOI 10.18372/2306-1472.70.11432
- Views 118
- Downloads 0
STOCHASTIC METHODS OF STEEL CONSTRUCTIONS’ CALCULATION OF THE SILO CAPACITIES AT THE SEISMIC STABILITY
The paper deals with the technique of assessment of the re liability function of the construction of vertical cylindrical silos under the seismic influen ce. The developed approach is based on the th e...
LIFE AND SCIENTIFIC ACHIEVEMENTS OF TRYPHON MAKSYMOVYCH BASHTA
The article considers life and scientific achievements of T. M. Bashta (1904 -1987), a product manager of aircraft industry and the founder of home scientific school of industrial hydraulics....
FEATURES OF TESTING OF INERTIALLY STABILIZED PLATFORMS
Purpose: the paper focuses on problems of testing of inertially stabilized platforms operated on ground vehicles. The main goal is to consider possibilities to test such systems using simulation. Methods...
THE AIRCRAFT ACCIDENT PROBABILITY MODEL IN THE VICINITY OF THE AIRPORT
This paper describes the results of processing and statistical analysis of accident data involving different types of Ukrainian-registered aircraft and including data from the CIS. The proportions of aircraft accidents b...
RESEARCH AND MATHEMATICAL MODELING OF TURBULENT BOUNDARY LAYER AT POSITIVE PRESSURE GRADIENT
Purpose: Mathematical modeling of complex turbulent near-wall flows, that occur during the flow of airfoils, is impossible without understanding the nature of the flow in boundary layer. From...