Hydrogen production from aluminum alloy hydrolysis on vehicles is a hydrogen production technology, which mainly uses the chemical reaction between aluminum and water to produce hydrogen. Hydrogen produced by aluminum-water reaction can be expressed by the following formula:
2Al +4H2O=2AlO(OH) + 3H2↑
2Al+6H2O=2Al(OH)3+3H2↑
Aluminum is abundant in the earth, with wide sources, low price and low density. No harmful substances containing carbon and nitrogen are produced in the process of aluminum-water reaction, and the products are environmentally friendly. The hydrolysis reaction of metallic aluminum also has high hydrogen production and hydrogen production rate. Although aluminum is easy to react with water, under normal circumstances, due to the contact between aluminum surface and air, it will be covered with a dense oxide film, which will hinder the contact reaction between aluminum and water. Therefore, how to effectively remove the oxide film on the aluminum surface, accelerate the reaction and improve the conversion rate is the key to the aluminum-water reaction. In view of the above difficulties, by optimizing the composition and preparation process of hydrogen-producing aluminum alloy, high-activity hydrogen-producing aluminum alloy can be obtained, and hydrogen can be produced through rapid hydrolysis. The hydrolysis product metaaluminate obtained after hydrogen production can be directly used as flame retardant material. High-quality metaaluminate can be used in battery separator industry and can be further processed into micro-nano alumina, which has high economic value. At the same time, better quality aluminum oxide can be obtained by heating metaaluminate and aluminum hydroxide.
Professor Dong Shijie of Hubei University of Technology led the team to develop related technologies in 2006, and 20 10 was approved by the Ministry of Science and Technology as a special project of "Basic Research on Key Technologies for Preparing Hydrogen Aluminum Alloy by Hydrolysis for Vehicles", and 20 17 was approved as a general project of the National Natural Science Foundation of China "Preparation and Hydrogen Production Mechanism of Highly Active Micro-Nano Al-Ga-in-Bi2O3-SNCl2 Hydrolysis Hydrogen Material".
The authorized patent ZL20 16 10564832.5 discloses an aluminum alloy for hydrogen production by hydrolysis and a preparation method thereof. By mechanical alloying, a small amount of low melting point metals and inorganic salts were added to aluminum powder to prepare aluminum alloy which can react with water at room temperature and pressure. Moreover, aluminum alloys with different hydrogen production can be obtained by adjusting the content of additives. Patent application cn20191017543.4 discloses an Aluminum alloy for hydrogen production by hydrolysis, and its preparation method and application, which consists of 90-95wt% of al and 5- 10wt% of additives, and the additives are simple metal, metal oxide and 0.0wt%. Aluminum alloy for hydrogen production by hydrolysis was prepared by mechanical alloying. According to different needs, aluminum alloys with different hydrogen production properties can be obtained by changing the composition and content of additives and mechanical alloying process parameters. The above two patents have been authorized to Nanyang Dong Qing Energy Technology Co., Ltd., allowing them to be used during the operation period, and the authorized use period is 4 years.