Abstract: A device for generation of hydrogen gas by dehydrogenation of hydrocarbon fuels. The device includes a fuel reservoir connected to a reactor by a fuel line to supply said reactor with fuel. The reactor has a first discharge for recycling of residual hydrocarbons generated during dehydrogenation to the fuel reservoir and optionally cooperates with a catalyst. The fuel reservoir may contact a heat exchanger by the fuel line and the first discharge. The fuel may be preheated by the heat exchanger which may be introduced to the reactor by the fuel line and the reactor may have a heating device for heating the introduced fuel to reaction temperature. The residual fuel generated by dehydrogenation in the reactor may be cooled by the heat exchanger and may be returned to the fuel reservoir. The reactor may have a second discharge for the extraction of the hydrogen gas generated on dehydrogenation.

Abstract: A method for reversibly switchable cross-linking of monomers includes cross-linking the monomers by adding complexable metal ions to form a polymer, and bond-breaking the polymer formed by applying a direct voltage, by changing the pH value or by changing the temperature. The monomers include compounds of the general formulas R1 through R6 may be equal or different and are selected from the group consisting of H, OH, —NX2, —OX, —SH, and —SX, with X being selected from alkyl and/or aryl groups which are terminally substituted by reactive residues selected from the group consisting of OH, —CH(O)CH2, —NCO, —COOH and NZ2. Z is selected from the group consisting of alkyl groups, aryl groups and a hydrogen atom, one of the groups Z being a hydrogen atom with the proviso that not all residues R1 through R are hydrogen atoms at the same time.