A closed methanol steam reforming fuel cell hydrogen source system and hydrogen production method

Abstract

A closed methanol steam reforming fuel cell hydrogen source system, including a methanol supply device, a liquid oxygen device, a carbon dioxide storage device, a water storage device and a methanol hydrogen production device system; the methanol hydrogen production device includes a combustion evaporator, a heavy The whole unit, burner, carbon monoxide selective oxidation reactor and other auxiliary systems; the burner, reformer, evaporator and carbon monoxide selective oxidation reactor are modular integrated structures. Hydrogen production method, after methanol and water are gasified by the evaporator, they enter the reformer to react to obtain the reformed gas, and then pass through the carbon monoxide selective oxidation reactor to further reduce the carbon monoxide concentration in the reformed gas, and finally pass it into the fuel cell system for further processing electrochemical reaction. The invention has the advantages of closed operation of the overall system; improved operability and safety of the system; good matching between heat exchange and reaction can be achieved, and high efficiency and compactness of the reforming hydrogen production system are realized.

Description

technical field [0001] The invention relates to the field of hydrogen production, in particular to a hydrogen source system for a closed methanol steam reforming fuel cell. Background technique [0002] Hydrogen energy and fuel cell technology are one of the focuses of international energy technology and industrial development today. The fuel cell-based mobile power and distributed energy supply system is clean, efficient, and flexible, and will provide a new and important form of terminal energy utilization. However, in order to use hydrogen fuel cells to power various distributed energy systems, it is necessary to have a wide range of reliable and cheap hydrogen sources. Although the industrial-scale coal and natural gas hydrogen production technology is mature, the terminal price of hydrogen will rise sharply after hydrogen compression, storage and transportation. At the same time, the supporting infrastructure for hydrogen energy utilization has not been established at ...

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Problems solved by technology

The above process can get pure H through the membrane separator 2 However, the evaporation and gasification of the raw material of methanol and water in the above system need external heat to complete, which increases the energy consumption of the system; and the heat of reforming in the patent mainly depends on H 2 The heat capacity of hydrogen and residual gas is completed, because the specific heat of residual gas and hydrogen is relatively small, and the heat required for reforming is relatively large, which will inevitably increase the difficulty of reformer design

[0011] It is worth pointing out that the reforming hydrogen production system disclosed in the above patents is an open system, and the requirements for exhaust emissions of the entire system are not high.

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