Sponge carrier catalyst for catalytic hydrolysis hydrogen production and preparation method and application thereof

A catalytic hydrolysis and catalyst technology, applied in the direction of catalyst activation/preparation, organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, etc., can solve the problem of inability to realize catalyst recovery and multiple use, weak physical adsorption Effect, transition metal shedding and other problems, to achieve the effect of easy recycling and multiple use, increase hydrogen storage density, and enhance force

Active Publication Date: 2020-10-30
苏州清德氢能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, it should be pointed out that although the preparation method in this patent also involves mixing and drying the transition metal salt solution and the melamine sponge, further research by the research group of the present invention found that there is only weak physical adsorption between the melamine sponge and the transition metal salt role in NaBH 4 During the hydrolysis process, the transition metals are easy to fall off from the surface of the melamine sponge, and the positive effect of catalyst recovery and repeated use in the present invention cannot be realized. In fact, the previous research work of the research group of the present invention does not involve the need for comparison between the sponge and the transition metal. strong interaction

Method used

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  • Sponge carrier catalyst for catalytic hydrolysis hydrogen production and preparation method and application thereof
  • Sponge carrier catalyst for catalytic hydrolysis hydrogen production and preparation method and application thereof
  • Sponge carrier catalyst for catalytic hydrolysis hydrogen production and preparation method and application thereof

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Embodiment 1

[0051] The preparation process of the sponge carrier catalyst is as follows: figure 1 shown. Using polyvinyl formal (PVF) sponge as the carrier, the apparent density is 0.12g cm -3 , cut into a cylinder of Φ20mm*h50mm. The surface of PVF sponge has oxygen-containing groups, which can directly adsorb transition metal ions. Preparation of CoCl with a mass fraction of 10% 2 Put 20mL of aqueous solution into the PVF sponge, squeeze it repeatedly for 3 to 5 times, and fully soak it so that the PVF sponge can fully absorb CoCl 2 aqueous solution. will absorb full CoCl 2 The PVF sponge in aqueous solution was placed in an oven at 60 °C and dried for 24 hours. Put the dried PVF sponge into 50mL NaBH with a mass fraction of 5% 4 Fully react in aqueous solution, wash with water repeatedly, and squeeze 2 to 3 times to obtain a PVF sponge-supported catalyst loaded with Co-B, wherein the molar ratio of Co:B is 2:1, and the mass of Co-B is about that of PVF sponge. 10%, figure 2 S...

Embodiment 2

[0055] Using melamine (MF) sponge as the carrier, the apparent density is 0.008 g cm -3 , the surface of MF sponge has no functional groups that coordinate with transition metal ions, and its interaction force with transition metal ions is enhanced by plasma surface modification. Cut the melamine sponge into small pieces with a side length of 0.5 cm, and place it in a quartz reactor with an inner diameter of 5 cm for plasma modification. The reaction conditions are: at room temperature, the reactor pressure is 100 Pa, and the atmosphere is air containing 30% water vapor. , with a total gas flow rate of 200mL / min, 100W radio frequency glow discharge plasma treatment for 20min, to introduce oxygen-containing functional groups to the surface of MF sponge fibers.

[0056] A total of 300cm of MF sponge after plasma treatment 3 With 250mL Ni(NO 3 ) 2 The solution is fully mixed, and repeatedly squeezed 3 to 5 times to make the sponge fully absorb Ni(NO 3 ) 2 solution, keep the ...

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Abstract

The invention belongs to the technical field of hydrogen storage and the field of fuel cells, and particularly relates to a supported transition metal-based catalyst based on polymer sponge, a preparation method of the supported transition metal-based catalyst and application of the supported transition metal-based catalyst in catalyzing NaBH4 to hydrolyze to produce hydrogen. A carrier of the catalyst is sponge, an active component of the catalyst is transition metal, the mass ratio of the transition metal to the sponge is 1: (1-100), and oxygen-containing groups are arranged on the surface of the sponge. The transition metal and the polymer sponge carrier form strong connection through chemical bonding, and the loaded transition metal does not fall off in gas and liquid scouring and sponge extrusion processes, so that the performance of the NaBH4 hydrolysis hydrogen production system is effectively improved. Based on the fact that the sponge has high water absorption, the sponge carrier catalyst does not contain flowing liquid water in most of time systems in the hydrogen production application process of a simple device, and the use convenience of the device is improved.

Description

technical field [0001] The invention belongs to the field of hydrogen storage technology and the field of fuel cells, and specifically relates to a transition metal-based catalyst based on a polymer sponge and a preparation method thereof and a method for catalyzing NaBH 4 Application in hydrogen production by hydrolysis. Background technique [0002] Hydrogen storage is a key technology for hydrogen fuel cell applications. NaBH 4 Hydrogen production by hydrolysis is an efficient in-situ hydrogen production technology, which has the advantages of high theoretical hydrogen storage density and easy control of the reaction, and is very suitable for hydrogen supply of small and medium-sized fuel cells. [0003] NaBH 4 Can form a very stable alkaline aqueous solution, NaBH 4 Under the catalysis of transition metals such as Co and Ni, the alkaline aqueous solution of NaBH 4 Hydrogen can be rapidly hydrolyzed. Therefore, common NaBH 4 Hydrolysis hydrogen production method is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J37/16B01J37/34B01J37/02C01B3/06
CPCB01J31/06B01J37/16B01J37/349B01J37/0201C01B3/065Y02E60/36
Inventor 邓霁峰谢镭郑捷李星国刘啸时雨
Owner 苏州清德氢能源科技有限公司
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