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A kind of preparation method of non-supported boride catalyst

A catalyst and boride technology, which is applied in the field of preparation of unsupported metal boride catalysts, can solve the problems of insufficient combination of catalyst active substances and supports, reduced catalyst performance, and difficulty in direct application, and achieves low cost and time-consuming. Short, environmentally friendly effects

Inactive Publication Date: 2011-11-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former is difficult to be directly applied because the catalyst is ultrafine powder in shape and is easily carried out of the reactor by the hydrogen gas flow or the mixture of hydrogen and reaction waste liquid; The combination between the active material and the support is not tight enough, it is easy to fall off, and the service life is short.

Method used

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  • A kind of preparation method of non-supported boride catalyst
  • A kind of preparation method of non-supported boride catalyst
  • A kind of preparation method of non-supported boride catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0028] According to CoB:NH 4 HCO 3= The ratio of 100:50 weighs two substances of a certain quality, and after they are fully ground by a mortar, take 0.1512g of them and place them in a ф13mm stainless steel mold, keep them at 14MPa for 1min, and heat treat them according to the following procedures after taking them out: at 1°C The heating rate / min is raised from room temperature to 150°C and kept for 1 hour, and then raised to 245°C for 40 minutes and kept for 40 minutes (the heating rate at this stage has little effect on the final catalyst performance, for example, the temperature is averaged at 0.2-20°C / min Can), finally obtain 0.0981g disc catalyst, can be directly used in the hydrogen production reaction of borohydride hydrolysis. According to Lee et al. (Catalysis Today 120 (2007) 305-310) investigate the method for the hydrogen production catalyst strength of sodium borohydride hydrolysis, this catalyst tablet is placed in ultrasonic cleaner (Kunshan Ultrasonic Instr...

Embodiment 2

[0030] According to CoB:PVDF:NH 4 HCO 3 = 100:40:3 ratio Weigh three kinds of substances with a certain quality, after being fully ground by a mortar, take 0.1442g of them and place them in a ф13mm stainless steel mold, keep at 20MPa for 1min, take them out and heat treat them according to the following procedures: The temperature was raised from room temperature to 150°C at a rate of 1°C / min and kept for 1 hour, and then raised to 245°C for 60 minutes and kept for 40 minutes to obtain 0.1386 g of sheet-shaped catalyst, which can be directly used in the hydrogen production reaction of borohydride hydrolysis. According to Lee et al. (Catalysis Today 120 (2007) 305-310) investigate the method for the hydrogen production catalyst strength of sodium borohydride hydrolysis, this catalyst tablet is placed in ultrasonic cleaner (Kunshan Ultrasonic Instrument Co., Ltd.; model: KQ5200B, 40KHZ; Power: 200W) After ultrasonic vibration for 2 hours, take it out and vacuum dry it at 90°C, ...

Embodiment 3

[0032] According to CoB:PVDF:NH 4 HCO 3 =100:2:30 ratio Weigh a certain mass of the three substances, grind them evenly in a mortar, take 0.1336g of them and put them in a ф13mm stainless steel mold, keep at 2MPa for 1min, take them out and heat treat them according to the following procedures: The temperature increase rate was 1°C / min from room temperature to 150°C for 1 hour, and then 100 minutes to 245°C for 40 minutes to obtain 0.1003 g of sheet-shaped catalyst, which can be directly used in the hydrogen production reaction of borohydride hydrolysis. According to Lee et al. (Catalysis Today 120 (2007) 305-310) investigate the method for the hydrogen production catalyst strength of sodium borohydride hydrolysis, this catalyst tablet is placed in ultrasonic cleaner (Kunshan Ultrasonic Instrument Co., Ltd.; model: KQ5200B, 40KHZ; Power: 200W) After 6 hours of ultrasonic vibration, take it out and vacuum dry it at 90°C, the remaining mass rate is still 100%, indicating that i...

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Abstract

The invention belongs to the technical field of hydrogen preparation, and in particular relates to a method for preparing a non-loaded metal boride catalyst with high activity for hydrolyzing borohydride to produce hydrogen. The catalyst active component is a metal boride. The preparation method is as follows: the precursor metal boride, the binder and the pore-forming agent are uniformly mixed in a certain proportion, and the final catalyst is prepared through molding and heat treatment steps. When the catalyst of the invention is used in the hydrolysis reaction of borohydride to produce hydrogen, it not only has a relatively high and stable hydrogen production rate, but also has high strength, can withstand the impact caused by hydrogen generation under hydrolysis conditions, and has high mechanical strength. Since it is a shaped catalyst, it can be directly used in various types of reactors. The catalyst has the advantages of easy availability of raw materials, low price, simple preparation process, environmental friendliness and the like, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the preparation of hydrogen, in particular to a method for preparing a non-loaded metal boride catalyst with high activity for hydrolyzing borohydride to produce hydrogen. Background technique [0002] Hydrogen is widely regarded as the clean energy of the future because it can be used directly in internal combustion engines, or as fuel in fuel cells to drive vehicles or as a power source for other purposes. [0003] Hydrogen is more thermally efficient than gasoline as a fuel for internal combustion engine vehicles because it burns more completely in excess air than gasoline and can use higher compression ratios; in addition, it has a stronger effect on the air / fuel ratio Adaptability, so it has higher combustion efficiency in the process of frequent starting and braking. Another significant advantage of hydrogen as a fuel for internal combustion engine vehicles is that it does not produce CO, unburned hydrocarbons, smoke, od...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/08B01J21/02B01J23/75C01B3/06
CPCY02E60/36
Inventor 张华民叶威董明全刘宗浩
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI