Electrochemical membrane reactor for the reduction of carbondioxide to formate

Abstract

An electrochemical reactor with anode and cathode chambers separated by a composite perfluoro polymer cation exchange membrane was designed, fabricated and used for the reduction of dissolved carbon dioxide under ambient conditions to formate. The flow reactor enhanced the mass transfer of carbon dioxide compared to the batch reactor and maximum current efficiency of 93% for formate formation was obtained. A formate concentration of 1.5 Â 10 )2 mol dm )3 was obtained. Experiments were conducted using two different perfluoro polymer membranes -Nafion 961 and Nafion 430. Optimum values of flow rate and current density were evaluated for the energy efficient formation of formate in aqueous phosphate buffer solutions.

Microstructural surface changes of electrodeposited Pb on gas diffusion electrode during electroreduction of gas‐phase CO2

“…The electroreduction phase involved a preparatory step where fully humidified gases were passed into the zero-gap cell prior to supply of reduction current. In order to characterise the state of the electrode surface and consequently study their behaviour during electroreduction of CO 2 ples from each experimental phase were taken for SEM and XRD analysis. Investigation of the structure and crystalline forms of the freshly deposited Pb was carried out and the results are shown in Fig.…”

“…Kyoto pact was formed to mitigate further CO 2 and other greenhouse gas emmisions. The pact came into effect in 2005 and calls for a 2% reduction in atmospheric concentrations of greenhouse gases below the 1990 levels by 2012.…”

Electro-reduction of carbon dioxide to formate on lead electrode in aqueous medium

“…However, its widespread availability can also contribute as a valuable reactant for synthesizing chemicals [1][2][3][4][5][6][7][8][9]. Today, there is a growing demand for formic acid which is used in pharmaceutical syntheses, as well as paper and pulp production.…”

Transformation of Carbon Dioxide to Useable Products through Free Radical‐Induced Reactions

“…Recently, several reactors with different designs have been used for CO 2 reduction to HCOOH [119][120][121][122][123][124][125][126]. Many of these designs have been based on a fuel cell in which mostly polymer electrolyte membranes were used to separate the anode and cathode.…”