Methanol-water steam reforming and hydrogen separation integrated ultrahigh-pressure hydrogen production system and method thereof

Abstract

The invention relates to a methanol-water steam reforming and hydrogen separation integrated ultrahigh-pressure hydrogen production system. The system comprises a reforming separation device, a three-phase heat exchange device, a steam trap, a water-cooled heat exchanger, a carbon dioxide separation device and a water gas reforming device the operating temperature of the water-cooled heat exchanger is less than or equal to 30.8 DEG C; the pump pressure of a liquid pump is 40-100 MPa; and pure hydrogen is fed into a hydrogen storage tank under the pumping pressure of the liquid pump. An ultrahigh-pressure hydrogen production method using methanol water comprises the following steps: the liquid pump feeds methanol water into the inlet pipe of a methanol-water steam pipe under the pump pressure of 40-100 MPa, pure hydrogen and a mixed gas are separated in the reaction cavity of the reforming separation device, the pure hydrogen is fed into the hydrogen storage tank under the pump pressureof the liquid pump, the hydrogen mixed residual gas is subjected to water distribution reforming to obtain a reformed mixed gas, and the reformed mixed gas is fed into the reaction cavity again and undergoes the hydrogen separation operation. The gas in the system is circularly purified, the theoretical yield can reach 100%, and the hydrogen yield is greater than or equal to 95%.

Description

technical field [0001] The invention relates to an ultra-high pressure hydrogen system integrated with methanol steam reforming and hydrogen separation and a method thereof. Background technique [0002] Hydrogen energy is the most ideal energy source in the 21st century. As a fuel for automobiles, it is easy to start at low temperature, and has little corrosion effect on the engine, which can prolong the service life of the engine. Because hydrogen and air can be mixed evenly, the carburetor used in general cars can be completely omitted, thereby simplifying the structure of existing cars. Even more interesting, just add 4% hydrogen to gasoline. Using it as a vehicle engine fuel can save fuel by 40%, and there is no need to make much improvement to the gasoline engine. Hydrogen fuel cell as power generation system. [0003] No pollution, the fuel cell has no pollution to the environment. It uses electrochemical reaction instead of combustion (gasoline, diesel) or energy...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide an integrated ultra-high pressurized hydrogen system for methanol steam reforming and hydrogen separation, and to solve the gap between the reformer and the hydrogen separation device in the current hydrogen production system. Due to the split structure, the hydrogen production system is complicated;

[0009] At the same time, it provides an ultra-high pressure hydrogen method, which solves the problem that the current hydrogen production process is complicated and cannot achieve circular hydrogen production.

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