Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing hydrogen from hydroboron

A borohydride and hydrogen technology, applied in the field of hydrogen energy, can solve the problems of low hydrogen production rate and reaction conversion rate, difficult recovery of metal catalysts, incomplete reaction, etc., and achieve high hydrogen production rate, low price and easy operation convenient effect

Inactive Publication Date: 2021-04-02
PEKING UNIV +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogen production rate and reaction conversion rate of these methods are very low. The reason is that the alkalinity of the reaction system is continuously enhanced during the reaction, which inhibits the reaction, resulting in a continuous reduction in the reaction rate and an incomplete reaction. , so it is necessary to use a catalyst to promote the reaction. Commonly used catalysts include transition metals such as Co, Ni, and Pt. However, the use of metal catalysts has problems such as difficult recovery, complex reaction equipment, high price, and environmental pollution.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing hydrogen from hydroboron
  • Method for preparing hydrogen from hydroboron
  • Method for preparing hydrogen from hydroboron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0031] According to a preferred embodiment of the present invention, the hydroxyl compound is a polyhydroxy compound.

[0032] Methanol is one of the hydroxyl compounds, NaB(OCH 3 ) 4 Because the B-O bond is not strong, part of the methoxy group is ionized, which enhances the alkalinity of the solution. Therefore, the present invention intends to connect the carbon atoms of the methoxy group through a C-C bond to form a carbon chain with stronger rigidity. Macroscopically, the ionization of products is suppressed and the conversion rate of reactants is increased. Therefore, the present invention preferably adopts polyhydroxy compound and borohydride to react to produce hydrogen.

[0033] In the present invention, the polyhydroxy compound is selected from the group consisting of ethylene glycol, propylene glycol, glycerol, butanediol, butanetriol, butylene glycol, pentaerythritol, pentaerythritol, hexanehexanol, heptanol, polyethylene One or more of alcohol, starch, cellulo...

Embodiment 1

[0059] Example 1 The mass ratio of sodium borohydride, erythritol and water is 1:4:4

[0060] Take 100mg of sodium borohydride (NaBH 4 ), 400mg of erythritol (a kind of butylene glycol, molecular formula CH 2 (OH)CH(OH)CH(OH)CH 2 (OH)), after grinding and mixing, put into a 20mL round bottom flask, put a rubber stopper on the flask, and inject 400mg of water through a syringe. The flask was heated in a water bath at 50°C, and at the same time, a stainless steel pipeline was passed through the rubber stopper to export the gas generated in the flask, and the gas was collected by drainage and gas collection. Within 90 minutes, 240 mL of gas was collected, and the conversion rate of sodium borohydride was calculated to be about 96%.

[0061] Its reaction kinetic curve is as follows figure 1 and figure 2 shown by figure 1 It can be seen that after 5 minutes of reaction, the conversion rate of sodium borohydride can reach more than 70%, and after 15 minutes of reaction, the c...

Embodiment 2

[0062] Example 2 The mass ratio of sodium borohydride, xylitol and water is 1:3.3:0.4 Take 300mg of sodium borohydride (NaBH 4 ), 1000mg of xylitol (a kind of pentapentyl alcohol, molecular formula CH 2 (OH)CH(OH)CH(OH)CH(OH)CH 2 (OH)), after grinding and mixing, put it into a 50mL round bottom flask, put a rubber stopper on the flask, and inject 120mg of water into the flask. The flask was heated in a water bath at 50°C, and at the same time, a stainless steel pipeline was passed through the rubber stopper to export the gas generated in the flask, and the gas was collected by drainage and gas collection. Use a thermocouple to pass through the rubber stopper and extend into the mixture in the flask to monitor the temperature in the flask. When the thermocouple shows that the temperature of the reactants in the flask reaches 46°C, a large amount of hydrogen gas is released instantaneously, and the temperature of the reactants instantly rises to about 100°C, and 520mL of gas i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for preparing hydrogen from hydroboron. The method adopts hydroboron and a polyhydroxy compound as raw materials for preparation, and comprises the following steps: firstly, mixing the hydroboron, the polyhydroxy compound and a solvent, performing heating reaction, and preparing and collecting hydrogen. The method for preparing hydrogen from hydroboron is simple andconvenient to operate, can completely react at a low temperature, avoids the defects that a metal powder catalyst is not easy to recover, a reaction device is complex and high in price and the environment is polluted due to the fact that no catalyst is adopted in the preparation process, and meanwhile, enables the preparation cost to be lower. The preparation process is more environmentally friendly, the preparation method has a high reaction rate and a high hydroboron conversion rate, and a new thought is developed for a portable one-time hydrogen supply technology.

Description

technical field [0001] The invention relates to the field of hydrogen energy, in particular to a method for preparing hydrogen from borohydride. Background technique [0002] A hydrogen fuel cell is a device that directly converts the energy released by the reaction of hydrogen and oxygen into electrical energy, and has broad application prospects. Hydrogen storage is a key technology for hydrogen fuel cell applications. In the process of hydrogen energy utilization, in order to solve the problem of hydrogen storage, various hydrogen storage materials and hydrogen storage methods have been developed. Among them, borohydride has received more attention and research because of its high hydrogen content, stable properties, and easy storage. It is a one-time hydrogen supply technology with great application prospects. [0003] There are pyrolysis, hydrolysis, alcoholysis and so on to produce hydrogen by using borohydride. For example, sodium borohydride can react with water t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B3/02
CPCC01B3/02Y02P20/584
Inventor 王聪曾辉冯利利谭波李昕徐金荣谢镭郑捷李星国
Owner PEKING UNIV