Provided is a carbon dioxide recovery device including an absorption part that produces a compound of carbon dioxide and an amine contained in an absorbing solution, and a regeneration part that includes an anode that desorbs the carbon dioxide from the compound to produce a complex compound of the amine, and a cathode that is electrically connected to the anode and regenerates the amine from the complex compound.

Provided is a carbon dioxide recovery device including an absorption part that produces a compound of carbon dioxide and an amine contained in an absorbing solution, and a regeneration part that includes an anode that desorbs the carbon dioxide from the compound to produce a complex compound of the amine, and a cathode that is electrically connected to the anode and regenerates the amine from the complex compound.

An electrode 1 includes a resin film 2, a metal underlying layer 3, and an electrically conductive carbon layer 4 having sp.sup.2 bonding and sp.sup.3 bonding in order toward one side in a thickness direction. A ratio of the number of sp.sup.3-bonded atoms to the sum of the number of sp.sup.3-bonded atoms and the number of sp.sup.2-bonded atoms is 0.25 or more. A thickness of the metal underlying layer 3 is below 50 nm.

An electrode 1 includes a resin film 2, a metal underlying layer 3, and an electrically conductive carbon layer 4 having sp.sup.2 bonding and sp.sup.3 bonding in order toward one side in a thickness direction. A ratio of the number of sp.sup.3-bonded atoms to the sum of the number of sp.sup.3-bonded atoms and the number of sp.sup.2-bonded atoms is 0.25 or more. A thickness of the metal underlying layer 3 is below 50 nm.

Methods for electrochemically oxidizing aromatic aldehydes, such as furfural and furfural derivatives, to carboxylic acids in acidic solutions are provided. Also provided are electrochemical cells for carrying out the oxidation reactions. The electrochemical oxidations may be conducted in aqueous media at ambient pressure and mild temperatures.

Methods for electrochemically oxidizing aromatic aldehydes, such as furfural and furfural derivatives, to carboxylic acids in acidic solutions are provided. Also provided are electrochemical cells for carrying out the oxidation reactions. The electrochemical oxidations may be conducted in aqueous media at ambient pressure and mild temperatures.

An ion source and ion recycle module includes an electrolyte reservoir, an eluent recovery chamber, and an ion exchange connector. The electrolyte reservoir includes a chamber containing an aqueous electrolyte solution including an electrolyte having a chamber inlet and a chamber outlet, and a first electrode. The chamber inlet is fluidically connected to a source chamber of an electrolytic eluent generator and configured to receive depleted electrolyte solution from the source chamber of the electrolytic eluent generator. The chamber outlet is fluidically connected to the source chamber of the electrolytic eluent generator and configured to provide recycled electrolyte solution to the electrolytic eluent generator source chamber. The eluent recovery chamber including a second electrode and configured to receive an eluent solution including eluent counter ions from the eluent generator; and the ion exchange connector including an ion exchange membrane stack.

An ion source and ion recycle module includes an electrolyte reservoir, an eluent recovery chamber, and an ion exchange connector. The electrolyte reservoir includes a chamber containing an aqueous electrolyte solution including an electrolyte having a chamber inlet and a chamber outlet, and a first electrode. The chamber inlet is fluidically connected to a source chamber of an electrolytic eluent generator and configured to receive depleted electrolyte solution from the source chamber of the electrolytic eluent generator. The chamber outlet is fluidically connected to the source chamber of the electrolytic eluent generator and configured to provide recycled electrolyte solution to the electrolytic eluent generator source chamber. The eluent recovery chamber including a second electrode and configured to receive an eluent solution including eluent counter ions from the eluent generator; and the ion exchange connector including an ion exchange membrane stack.

The present invention relates to a method for manufacturing hydrogen by an improved electrolytic process; to electrolytic cells (electrolyzers) adapted to such a process and to devices comprising such electrolytic cells. The invention further relates to new uses of aqueous hydrazine; particularly as an electrolyte.

The present invention relates to a method for manufacturing hydrogen by an improved electrolytic process; to electrolytic cells (electrolyzers) adapted to such a process and to devices comprising such electrolytic cells. The invention further relates to new uses of aqueous hydrazine; particularly as an electrolyte.