Preparation and dehydrogenation methods for perhydrogenated hydrogen storage molecule

Abstract

The invention discloses a preparation method for a perhydrogenated hydrogen storage molecule. The preparation method comprises the following steps: S1, precisely weighing quinoline and a catalyst, andadding quinoline and the catalyst into a reactor; S2, connecting the reactor to a temperature induction device; S3, charging hydrogen into the reactor, exhausting air in the reactor, and keeping thepressure in the reactor consistent with atmospheric pressure; S4, setting the reaction temperature, pressure and rotating speed, carrying out constant-speed heating to the reaction temperature, meanwhile, increasing the pressure to a set value, regulating the rotating speed to a set value, and maintaining the pressure at a set value in a reaction process; S5, when quinoline is completely convertedinto a perhydrogenated product, stopping a reaction, setting the temperature of the temperature induction device at 15-25 DEGC, and waiting for cooling; and S6, carrying out filtration, separation and collection to obtain the perhydrogenated hydrogen storage molecule. The preparation method is mild in hydrogenation condition, easy to realize perhydrogenation, incapable of generating the phenomenon of catalyst poisoning in a hydrogenation process and high in hydrogen storage capacity reaching to 6.54wt%.

Description

technical field [0001] The invention relates to the field of organic liquid hydrogen storage, in particular to a method for preparing and dehydrogenating fully hydrogenated hydrogen storage molecules. Background technique [0002] The introduction of nitrogen heteroatoms into aromatic fused ring compounds can significantly reduce the dehydrogenation temperature of its hydrides, increase the number of aromatic rings in fused ring compounds, and reduce the heat of hydrogenation accordingly, reducing the dehydrogenation temperature of its hydrides to a certain extent . Therefore, we consider two methods of introducing nitrogen heteroatoms into the aromatic ring and increasing the number of aromatic rings to find hydrogen storage molecules in organic liquids with lower dehydrogenation temperatures. However, as the number of aromatic rings increases, the melting and boiling point of condensed heterocyclic molecules generally increases with the increase of molecular weight, which...

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Problems solved by technology

However, as the number of aromatic rings increases, the melting and boiling point of fused heterocyclic molecules generally increases with the increase of molecular weight, which makes it unable to exist in liquid form at normal temperature and pressure, such as the melting point of N-ethylcarbazole It is 68°C, and it is solid at room temperature, which does not meet our concept and requirements of liquid organic hydrogen storage

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