A high space velocity methanol water hydrogen production catalyst and its preparation method and application

Abstract

The invention discloses a high-space velocity catalyst for hydrogen production from methanol-water and a preparation method and an application thereof. The high-space velocity catalyst for hydrogen production from methanol-water contains a modified cerium zirconium oxide solid solution carrier having a mass fraction of 70%-95% and active components having a mass fraction of 5%-30%. The active components include Pt and MnO2. The mass of the Pt is 10%-50% of the mass of the active components. The mass of the MnO2 is 50%-90% of the mass of the active components. The high-space velocity catalyst for hydrogen production from methanol-water of the invention has good catalytic performance at high space velocity, realizes the capacity of production of a large amount under the condition of small volume space, provides good conditions for a hydrogen source for fuel cells, and makes the application of the hydrogen production from methanol on hydrogen production on site (vehicle) such as automobiles and ships possible.

Description

technical field

[0001] The invention belongs to the technical field of hydrogen production, and in particular relates to a high space velocity methanol-water hydrogen production catalyst and its preparation method and application. Background technique

[0002] Hydrogen is an element with abundant reserves and high combustion calorific value on the earth. After burning, only water will be produced without any other pollution products. It is the cleanest energy source. Therefore, hydrogen energy is also called the ultimate energy source for mankind. A hydrogen fuel cell is a device that converts chemical energy directly into electrical energy without going through the Carnot cycle of hydrogen and oxygen, and the energy conversion efficiency can reach more than 60%. The emergence of fuel cell technology makes hydrogen the best energy source to replace fossil energy. In recent years, with the development of proton exchange membrane fuel cells, especially its application in auto...

Examples

Embodiment 1

[0029] A high space velocity methanol-water hydrogen production catalyst, which contains a modified cerium-zirconium oxide solid solution support with a mass fraction of 81%, and an active component with a mass fraction of 19%; the active component includes Pt and MnO 2 , the mass of the Pt accounts for 26% of the active component mass, the MnO 2 The mass accounts for 74% of the active component mass; the molecular formula of the modified cerium-zirconium oxide solid solution carrier is: Ce 0.7 Zr 0.3 Zn 0.1 (La 0.05 Y 0.05 ) 0.1 o 2.25 , where O is oxygen, and M is La and Y in rare earth metals.

[0030] The preparation method of the methanol water hydrogen production catalyst of high space velocity described in the present embodiment, it comprises the steps:

[0031] (1) Preparation of modified cerium-zirconium oxide solid solution carrier: The modified cerium-zirconium oxide solid solution carrier was prepared by coprecipitation method or sol-gel method, specifically...

Embodiment 2

[0036] A high space velocity methanol-water hydrogen production catalyst, which contains a modified cerium-zirconium oxide solid solution support with a mass fraction of 90%, and an active component with a mass fraction of 10%; the active component includes Pt and MnO 2 , the mass of the Pt accounts for 40% of the active component mass, the MnO 2 The mass accounts for 60% of the active component mass; the molecular formula of the modified cerium-zirconium oxide solid solution carrier is: Ce 0.6 Zr 0.4 Zn 0.07 La 0.05 o 2.145 , where O is oxygen, and M is La in rare earth metals.

[0037] The preparation method of the methanol water hydrogen production catalyst of high space velocity described in the present embodiment, it comprises the steps:

[0038] (1) Preparation of modified cerium-zirconium oxide solid solution carrier: The modified cerium-zirconium oxide solid solution carrier was prepared by coprecipitation method or sol-gel method, specifically, 260.5g cerium nitr...

Embodiment 3

[0042] A high space velocity methanol-water hydrogen production catalyst, which contains a modified cerium-zirconium oxide solid solution support with a mass fraction of 95%, and an active component with a mass fraction of 5%; the active component includes Pt and MnO 2 , the mass of the Pt accounts for 20% of the active component mass, the MnO 2 The mass accounts for 80% of the active component mass; the molecular formula of the modified cerium-zirconium oxide solid solution carrier is: Ce 0.65 Zr 0.35 Zn 0.09 Y 0.02 o 2.12 , where O is oxygen, and M is Y in rare earth metals.

[0043] The preparation method of the methanol water hydrogen production catalyst of high space velocity described in the present embodiment, it comprises the steps:

[0044] (1) Preparation of modified cerium-zirconium oxide solid solution carrier: The modified cerium-zirconium oxide solid solution carrier was prepared by coprecipitation method or sol-gel method, specifically, 282.2g cerium nitrat...

technical field

[0001] The invention belongs to the technical field of hydrogen production, and in particular relates to a high space velocity methanol-water hydrogen production catalyst and its preparation method and application. Background technique

[0002] Hydrogen is an element with abundant reserves and high combustion calorific value on the earth. After burning, only water will be produced without any other pollution products. It is the cleanest energy source. Therefore, hydrogen energy is also called the ultimate energy source for mankind. A hydrogen fuel cell is a device that converts chemical energy directly into electrical energy without going through the Carnot cycle of hydrogen and oxygen, and the energy conversion efficiency can reach more than 60%. The emergence of fuel cell technology makes hydrogen the best energy source to replace fossil energy. In recent years, with the development of proton exchange membrane fuel cells, especially its application in auto...

Examples

Embodiment 1

[0029] A high space velocity methanol-water hydrogen production catalyst, which contains a modified cerium-zirconium oxide solid solution support with a mass fraction of 81%, and an active component with a mass fraction of 19%; the active component includes Pt and MnO 2 , the mass of the Pt accounts for 26% of the active component mass, the MnO 2 The mass accounts for 74% of the active component mass; the molecular formula of the modified cerium-zirconium oxide solid solution carrier is: Ce 0.7 Zr 0.3 Zn 0.1 (La 0.05 Y 0.05 ) 0.1 o 2.25 , where O is oxygen, and M is La and Y in rare earth metals.

[0030] The preparation method of the methanol water hydrogen production catalyst of high space velocity described in the present embodiment, it comprises the steps:

[0031] (1) Preparation of modified cerium-zirconium oxide solid solution carrier: The modified cerium-zirconium oxide solid solution carrier was prepared by coprecipitation method or sol-gel method, specifically...

Embodiment 2

[0036] A high space velocity methanol-water hydrogen production catalyst, which contains a modified cerium-zirconium oxide solid solution support with a mass fraction of 90%, and an active component with a mass fraction of 10%; the active component includes Pt and MnO 2 , the mass of the Pt accounts for 40% of the active component mass, the MnO 2 The mass accounts for 60% of the active component mass; the molecular formula of the modified cerium-zirconium oxide solid solution carrier is: Ce 0.6 Zr 0.4 Zn 0.07 La 0.05 o 2.145 , where O is oxygen, and M is La in rare earth metals.

[0037] The preparation method of the methanol water hydrogen production catalyst of high space velocity described in the present embodiment, it comprises the steps:

[0038] (1) Preparation of modified cerium-zirconium oxide solid solution carrier: The modified cerium-zirconium oxide solid solution carrier was prepared by coprecipitation method or sol-gel method, specifically, 260.5g cerium nitr...

Embodiment 3

[0042] A high space velocity methanol-water hydrogen production catalyst, which contains a modified cerium-zirconium oxide solid solution support with a mass fraction of 95%, and an active component with a mass fraction of 5%; the active component includes Pt and MnO 2 , the mass of the Pt accounts for 20% of the active component mass, the MnO 2 The mass accounts for 80% of the active component mass; the molecular formula of the modified cerium-zirconium oxide solid solution carrier is: Ce 0.65 Zr 0.35 Zn 0.09 Y 0.02 o 2.12 , where O is oxygen, and M is Y in rare earth metals.

[0043] The preparation method of the methanol water hydrogen production catalyst of high space velocity described in the present embodiment, it comprises the steps:

[0044] (1) Preparation of modified cerium-zirconium oxide solid solution carrier: The modified cerium-zirconium oxide solid solution carrier was prepared by coprecipitation method or sol-gel method, specifically, 282.2g cerium nitrat...

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