Enclosed methanol-water steam reforming fuel cell hydrogen source system and hydrogen production method

Abstract

The invention discloses an enclosed methanol-water steam reforming fuel cell hydrogen source system, which comprises a methanol supplying device, a liquid oxygen device, a carbon dioxide storage device, a water storage device, and a methanol hydrogen producing device; wherein the methanol hydrogen producing device comprises an evaporation device, a reforming device, a combustion device, a carbon monoxide selective oxidation reactor, and other auxiliary systems; and the combustion device, reforming device, evaporation device, and carbon monoxide selective oxidation reactor are integrated into a module. According to the hydrogen production method, methanol and water are gasified by the evaporation device and then react in the reforming device to obtain reformed gas; then the reformed gas is processed by the monoxide selective oxidation reactor, the concentration of carbon monoxide in reformed gas is further reduced, and finally the reformed gas is introduced into the fuel cell system to carry out electrochemical reactions. The provided system has the advantages that the system operates in an enclosed space, the operability and safety of the system are both improved; the heat exchange and reactions are well matched, and the whole reforming hydrogen production system is high efficient and compact.

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 ...

AI Technical Summary

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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