A dehydrogenation reaction system for a liquid hydrogen source material includes a storage device used for storing a liquid hydrogen source material and a liquid hydrogen storage carrier, a reaction still for dehydrogenation of the liquid hydrogen source material, a gas-liquid separator for separating the products, hydrogen and liquid hydrogen storage carrier which are generated after dehydrogenation of the liquid hydrogen source material, a buffer tank used for storing hydrogen, and a heating device used for heating the reaction still. The liquid hydrogen source material is input into the reaction still by means of a pump through an input pipe, dehydrogenation reaction of the liquid hydrogen source material is conducted in the reaction still, generated hydrogen is conveyed to the buffer tank, and the liquid hydrogen storage carrier generated after dehydrogenation is conveyed back to the storage device.

A dehydrogenation reaction system for a liquid hydrogen source material includes a storage device used for storing a liquid hydrogen source material and a liquid hydrogen storage carrier, a reaction still for dehydrogenation of the liquid hydrogen source material, a gas-liquid separator for separating the products, hydrogen and liquid hydrogen storage carrier which are generated after dehydrogenation of the liquid hydrogen source material, a buffer tank used for storing hydrogen, and a heating device used for heating the reaction still. The liquid hydrogen source material is input into the reaction still by means of a pump through an input pipe, dehydrogenation reaction of the liquid hydrogen source material is conducted in the reaction still, generated hydrogen is conveyed to the buffer tank, and the liquid hydrogen storage carrier generated after dehydrogenation is conveyed back to the storage device.

A formic acid decomposition catalyst system includes organometallic complexes having formula 1: ##STR00001## wherein: M is a transition metal; E is P, N, or C (as in imidazolium carbene); R.sub.1, R.sub.2 are independently C.sub.1-6 alkyl groups; o is 1, 2, 3, or 4; R.sub.3 are independently hydrogen, C.sub.1-6 alkyl groups, OR.sub.14, NO.sub.2, halogen; R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, R.sub.12, R.sub.13, R.sub.15, R.sub.16 are independently hydrogen or C.sub.1-6 alkyl groups; R.sub.14 is a C.sub.1-6 alkyl group; and X.sup. is a negatively charge counter ion.

A formic acid decomposition catalyst system includes organometallic complexes having formula 1: ##STR00001## wherein: M is a transition metal; E is P, N, or C (as in imidazolium carbene); R.sub.1, R.sub.2 are independently C.sub.1-6 alkyl groups; o is 1, 2, 3, or 4; R.sub.3 are independently hydrogen, C.sub.1-6 alkyl groups, OR.sub.14, NO.sub.2, halogen; R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, R.sub.12, R.sub.13, R.sub.15, R.sub.16 are independently hydrogen or C.sub.1-6 alkyl groups; R.sub.14 is a C.sub.1-6 alkyl group; and X.sup. is a negatively charge counter ion.

A metal compound-graphene oxide composite that can be used for manufacture of hydrogen. A composite has graphene oxide and at least one metal compound selected from cobalt compounds, nickel compounds, and molybdenum compounds. If the metal compound includes a cobalt compound or a nickel compound, in the infrared absorption spectrum of the complex, absorption derived from CO groups is present and absorptions derived from OH groups and CO groups and absorption derived from bonds between graphene oxide and cobalt or nickel via oxygen atoms are essentially absent. If the metal compound is a molybdenum compound, in the infrared absorption spectrum of the complex, absorptions derived from CO groups, OH groups, and CO groups, and absorption derived from bonds between graphene oxide and cobalt or nickel via oxygen atoms, are all essentially absent.

A metal compound-graphene oxide composite that can be used for manufacture of hydrogen. A composite has graphene oxide and at least one metal compound selected from cobalt compounds, nickel compounds, and molybdenum compounds. If the metal compound includes a cobalt compound or a nickel compound, in the infrared absorption spectrum of the complex, absorption derived from CO groups is present and absorptions derived from OH groups and CO groups and absorption derived from bonds between graphene oxide and cobalt or nickel via oxygen atoms are essentially absent. If the metal compound is a molybdenum compound, in the infrared absorption spectrum of the complex, absorptions derived from CO groups, OH groups, and CO groups, and absorption derived from bonds between graphene oxide and cobalt or nickel via oxygen atoms, are all essentially absent.

A process and system for preparing C.sub.2 to C.sub.5 hydrocarbons includes introducing a feed stream containing hydrogen gas and a carbon-containing gas selected from carbon monoxide, carbon dioxide, and mixtures thereof into a first reaction zone, contacting the feed stream and a hybrid catalyst in the first reaction zone, introducing a reaction zone product stream into a water removal zone that is downstream from the first reaction zone, and introducing a product stream from the water removal zone into a second reaction zone, resulting in a final stream comprising C.sub.2 to C.sub.5 hydrocarbons. The hybrid catalyst includes a methanol synthesis component and a microporous solid acid component; the microporous solid acid component is a molecular sieve having 8-MR access. The water removal zone removes at least a portion of water from the reaction zone product stream.

A process and system for preparing C.sub.2 to C.sub.5 hydrocarbons includes introducing a feed stream containing hydrogen gas and a carbon-containing gas selected from carbon monoxide, carbon dioxide, and mixtures thereof into a first reaction zone, contacting the feed stream and a hybrid catalyst in the first reaction zone, introducing a reaction zone product stream into a water removal zone that is downstream from the first reaction zone, and introducing a product stream from the water removal zone into a second reaction zone, resulting in a final stream comprising C.sub.2 to C.sub.5 hydrocarbons. The hybrid catalyst includes a methanol synthesis component and a microporous solid acid component; the microporous solid acid component is a molecular sieve having 8-MR access. The water removal zone removes at least a portion of water from the reaction zone product stream.

Provided are a method by which hydrogen can be continuously and efficiently produced through a dehydrogenation reaction of a formic acid solution even at a low concentration and/or low grade, and a system therefor. This method involves a reaction step for, while supplying formic acid, catalytically degrading the formic acid into carbon dioxide and hydrogen to thereby continuously produce hydrogen. This method is characterized by involving an extraction step for extracting formic acid from the formic acid solution serving as the starting material with the use of carbon dioxide obtained in the reaction step, and then supplying the formic acid to the reaction step.

Provided are a method by which hydrogen can be continuously and efficiently produced through a dehydrogenation reaction of a formic acid solution even at a low concentration and/or low grade, and a system therefor. This method involves a reaction step for, while supplying formic acid, catalytically degrading the formic acid into carbon dioxide and hydrogen to thereby continuously produce hydrogen. This method is characterized by involving an extraction step for extracting formic acid from the formic acid solution serving as the starting material with the use of carbon dioxide obtained in the reaction step, and then supplying the formic acid to the reaction step.