Production process and equipment for preparing hydrogen by hydrolyzing NaBH4 of fuel cell

Abstract

The invention discloses a production process for preparing hydrogen by hydrolyzing NaBH4 of a fuel cell. The production process comprises the following steps of: a, adding a catalyst; b, adding a reaction solvent; c, performing gas-liquid separation; and d, purification, namely further purifying the hydrogen obtained after gas-liquid separation to remove impurities, metals, nonmetallic ions and salts, wherein after the purified hydrogen reaches 99.99 percent which meets the standard of industrial pure hydrogen, the hydrogen is supplied to the fuel cell. Production equipment for preparing the hydrogen by hydrolyzing the NaBH4 of the fuel cell comprises a liquid storage tank, a liquid conveying pump, a catalyst frame and a purifier, wherein 15 to 30 percent NaBO4 solution is stored in the liquid storage tank; a cooled heat exchanger is fixed in the liquid storage tank; the liquid conveying pump pumps the NaBO4 solution into a reaction tank; a water-cooled tube of the cooled heat exchanger is extended into the reaction tank; the catalyst is placed on the catalyst frame; the reaction tank is communicated with a steam pipeline of the cooled heat exchanger; the air outlet pipeline of the cooled heat exchanger is connected to the purifier; and the purifier supplies the hydrogen to the fuel cell. By the method and the equipment, the purity of the produced hydrogen is high, the specific energy of a system is high and the catalyst can be repeatedly used; and the equipment has high safety performance and long service life.

Description

Technical field: [0001] The present invention relates to the technical field of fuel cell, more specifically relate to the NaBH of fuel cell 4 Hydrolysis hydrogen production process and its equipment. Background technique: [0002] At present, there are two main types of methods for supplying hydrogen to fuel cells: physical methods and chemical methods. Physical methods include: high-pressure steel cylinder storage and supply method, low-temperature liquefied hydrogen method, glass microsphere storage, activated carbon adsorption storage, iron oxide adsorption storage, etc. Chemical methods mainly include: storage of metal hydrides, storage of organic liquid hydrides, storage of inorganic substances, etc. [0003] The technology of hydrogen generation by hydrolysis of NaBH4 is a safe and convenient new technology for catalytic hydrogen generation, and it is also a relatively popular technology for catalytic hydrogen generation. It has the following advantages: ①Sodium bor...

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Problems solved by technology

[0007] At present, sodium borohydride (NaBH 4 ) The catalysts used for hydrogen production by hydrolysis are all disposable, and their disadvantages are: 1. The catalyst cannot be reused after being used up, which makes the cost of hydrogen production high

2. The preparation process is more harmful, and it is easy to cause the harm of alkaline stimulation, which seriously affects the respiratory system and skin of the human body; 3. The manufacturing conditions are relatively high, and it is very inconvenient to operate

4. When using existing catalysts to produce hydrogen, due to the catalysts used, the general conditions of the production process are relatively high, the production equipment is relatively complicated, and the cost is also high

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