Abstract: A method for producing a carbon fiber material is disclosed, the method comprising the steps of a) Preparation of a solution of polyacrylonitrile in a suitable organic solvent b) Electrospinning of the solution obtained in a) and drying of the obtained fiber material c) Crosslinking of the obtained fiber material by heating to 150 to 350° C. in an air or oxygen atmosphere for 1 to 30 h d) Carbonization of the obtained fiber material in an inert gas atmosphere at a temperature in the range of 500 to 2,500° C., characterized in that no silicon, sulfur, metal compounds, intermetallic compounds, silicon compounds and/or sulfur compounds are added to the polyacrylonitrile solution in step a) and that neither stabilization nor surface modification steps are carried out with the fiber material by treatment with chemical reagents and/or exposure to tensile stress.

Abstract: The invention relates to a method for producing carbon monoxide, comprising the following steps: a) humidifying an educt gas containing carbon dioxide with water, b) supplying the humidified educt gas from step a) into an electrolytic cell (1), and c) electrolyzing the humidified educt gas supplied according to step b) in the electrolytic cell (1) such that the carbon monoxide is obtained. With the described method and with the described device (12), carbon monoxide can be produced via CO2 electrolysis with particularly high efficiency. This is achieved with the educt gas containing carbon dioxide being humidified before the electrolysis.

Abstract: A method for producing a synthesis gas including carbon monoxide and hydrogen comprises a number of steps. In particular, the method comprises: a) providing a feedstock gas comprising methane and carbon dioxide, b) converting the feedstock gas into an intermediate product gas comprising carbon dioxide and water vapor and c) converting the intermediate product gas obtained in step b) into the synthesis gas comprising carbon monoxide and hydrogen by means of electrolysis. The synthesis gas including carbon monoxide and hydrogen can be obtained from biogas with particularly high efficiency by means of the described method and an appropriate apparatus. To this end, the conversion of the biogas in a fuel cell is coupled with co-electrolysis in an electrolysis cell.

Abstract: A method for electrolysis, wherein an anolyte is brought into contact with an anode, and a catholyte is brought into contact with a cathode, wherein the anolyte contains hydroxide ions and the catholyte contains an auxiliary, wherein an electrical voltage is applied between the anode and the cathode such that the hydroxide ions in the anolyte are oxidized at the anode and the auxiliary in the catholyte is reduced at the cathode, and wherein H2O and the reduced auxiliary are brought into contact with a catalyst such that the reduced auxiliary is oxidized and hydrogen is formed from the H2O. By means of the auxiliary, the electrolysis can be carried out under low pressure, and hydrogen can still be obtained at high pressure. This facilitates the construction of the electrolytic cell and prevents an efficiency-reducing gas cross-permeation.

Abstract: An arrangement comprising electrochemical cells arranged adjoining one another in a stacking direction (x), wherein adjacent ones of the electrochemical cells are separated from one another by a respective electrically insulating separating element, wherein the electrochemical cells each have an anode chamber comprising an anode, a cathode chamber comprising a cathode, and a membrane arranged between the anode and the cathode chambers, wherein the anodes are each connected to the cathode of the electrochemical cell following in the stacking direction (x) via an electrically conductive connection, and wherein the electrically conductive connections pass through the separating element arranged between the respective anode and the respective cathode, and/or a boundary of the electrochemical cells. The electrically conductive connection between the anodes and the cathodes makes it possible to dispense with bipolar plates in the described arrangement.

Abstract: Method for electrolysis, wherein H2O is brought into contact with an anode, and a catholyte is brought into contact with a cathode, wherein the catholyte contains an auxiliary, wherein an electrical voltage is applied between the anode and the cathode such that oxygen is formed at the anode and the auxiliary is reduced at the cathode, and wherein protons and the reduced auxiliary are brought into contact with a catalyst such that the reduced auxiliary is oxidized and hydrogen is formed from the protons. By means of the auxiliary, the electrolysis can be carried out under low pressure, and hydrogen can still be obtained at high pressure. This facilitates the construction of the electrolytic cell and prevents an efficiency-reducing gas cross-permeation.

Abstract: The invention relates to a method for producing carbon monoxide, comprising the following steps: a) humidifying an educt gas containing carbon dioxide with water, b) supplying the humidified educt gas from step a) into an electrolytic cell (1), and c) electrolyzing the humidified educt gas supplied according to step b) in the electrolytic cell (1) such that the carbon monoxide is obtained. With the described method and with the described device (12), carbon monoxide can be produced via CO2 electrolysis with particularly high efficiency. This is achieved with the educt gas containing carbon dioxide being humidified before the electrolysis.

Abstract: A method for producing a carbon fiber material is disclosed, the method comprising the steps of a) Preparation of a solution of polyacrylonitrile in a suitable organic solvent b) Electrospinning of the solution obtained in a) and drying of the obtained fiber material c) Crosslinking of the obtained fiber material by heating to 150 to 350° C. in an air or oxygen atmosphere for 1 to 30 h d) Carbonization of the obtained fiber material in an inert gas atmosphere at a temperature in the range of 500 to 2,500° C., characterized in that no silicon, sulfur, metal compounds, intermetallic compounds, silicon compounds and/or sulfur compounds are added to the polyacrylonitrile solution in step a) and that neither stabilization nor surface modification steps are carried out with the fiber material by treatment with chemical reagents and/or exposure to tensile stress.