High-pressure hydrogen production system integrating methanol water vapor reforming and hydrogen separation, and method thereof

Abstract

The invention relates to a high-pressure hydrogen production system integrating methanol water vapor reforming and hydrogen separation. 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 pump pressure of a liquid pump is 18-50 MPa. A high-pressure method for producing hydrogen from methanol water includes steps that: the liquid pump feeds methanol water to a feeding pipe of a methanol water vapor pipe, with the pump pressure being 18 to 50MPa; carbon dioxide mixed residual gas is conveyed to the carbon dioxide separation device for carbon dioxide liquefaction and separation; hydrogen mixed residual gas is conveyed to the water gas reforming device for reforming; reformed mixed gas, along with the mixed gas of hydrogen, carbon dioxide and carbon monoxide, is conveyed into the reaction chamber again for hydrogen separation. Cyclic purification for gas in the system is achieved, the theoretical yield can reach 100% and the hydrogen yield of not less than 95% is achieved.

Description

technical field [0001] The invention relates to a 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 storag...

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Problems solved by technology

[0009] At the same time, it provides a 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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