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A kind of high temperature proton membrane catalyst and its preparation method and application

A proton membrane, catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to reduce sintering problems, improve life, and improve activity.

Active Publication Date: 2022-07-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ni-based catalysts generally use carbon nanotubes (CNTs) as supports, but the activity of Ni is significantly lower than that of Ru and Fe.

Method used

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  • A kind of high temperature proton membrane catalyst and its preparation method and application
  • A kind of high temperature proton membrane catalyst and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of high temperature proton membrane catalyst precursor includes the following steps:

[0028] 1) Weigh 3.487 g of samarium oxide and 3.442 g of cerium oxide, mix the samarium oxide and cerium oxide uniformly, and grind for 2 hours to obtain uniformly mixed samarium oxide and cerium oxide powder;

[0029] 2) The powder obtained in step 1) was calcined at a temperature of 500 °C for 12 hours in an argon atmosphere, and then cooled to room temperature naturally. The calcined product was ball-milled again to be uniform, and then shaken and sieved. The obtained powder was statically pressed and formed in an argon atmosphere. calcined again at 1200°C for 10 hours to form a solid solution, that is, to obtain a dense ceramic film;

[0030]3) Weigh 0.28g RuCl 3 Dissolve in 5.0 mL of deionized water to prepare the dipping solution, and evenly drop the dipping solution on one side wall of the ceramic membrane obtained in step 2) to make it saturated with water abs...

Embodiment 2

[0032] The preparation of high temperature proton membrane catalyst precursor includes the following steps:

[0033] 1) Weigh 3.258 g of lanthanum oxide and 2.092 g of germanium oxide, mix lanthanum oxide and germanium oxide uniformly, and grind for 3 hours to obtain uniformly mixed lanthanum oxide and germanium oxide powder;

[0034] 2) The powder obtained in step 1) was calcined at a temperature of 600 ° C for 16 hours in an argon atmosphere, and then cooled to room temperature naturally. The calcined product was ball-milled again to be uniform, and then shaken and sieved. The obtained powder was statically pressed and formed in an argon atmosphere. calcined again at 1500°C for 15 hours to form a solid solution, that is, to obtain a dense ceramic film;

[0035] 3) Weigh 0.22g RuCl 3 Dissolve in 5.0 mL of deionized water to prepare dipping solution A, and evenly drop dipping solution A on one side wall of the ceramic membrane obtained in step 2) to make it saturated with wat...

Embodiment 3

[0038] The preparation of high temperature proton membrane catalyst precursor includes the following steps:

[0039] 1) Weigh 3.365 g of neodymium oxide and 3.442 g of cerium oxide, mix the neodymium oxide and cerium oxide uniformly, and grind for 2 hours to obtain uniformly mixed neodymium oxide and cerium oxide powder;

[0040] 2) The powder obtained in step 1) was calcined at 800°C for 8 hours in an argon atmosphere, and then cooled to room temperature naturally. After the calcined product was ball-milled again, it was shaken and sieved. The obtained powder was statically pressed and formed in an argon atmosphere. calcined again at 1400°C for 10 hours to form a solid solution, that is, to obtain a dense ceramic film;

[0041] 3) Weigh 0.28g RuCl 3 ·3H 2 O was dissolved in 5.0 mL of deionized water to prepare an impregnating liquid, and the impregnating liquid was evenly drop-coated on one side wall of the ceramic membrane obtained in step 2) to make it saturated with wate...

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Abstract

The invention discloses a high-temperature proton membrane catalyst and a preparation method and application thereof. The high-temperature proton membrane catalyst comprises a high-temperature proton membrane carrier and a metal M supported on the high-temperature proton membrane carrier, and the high-temperature proton membrane carrier is an ABOx composite metal Oxide, A represents trivalent metal, B represents tetravalent metal, the molar ratio of A and B is 1:0.5~5; the metal M represents Ru, Fe or Ni, and the metal M on the high temperature proton membrane carrier The loading amount is 0.5~10wt.%. The high temperature proton membrane catalyst of the present invention has good catalytic efficiency in the hydrogen production reaction of ammonia decomposition, the conversion rate of ammonia decomposition can be as high as 99.5% or more, and the separation of hydrogen can be realized while catalyzing ammonia decomposition to hydrogen production.

Description

technical field [0001] The present invention relates to a high temperature proton membrane catalyst and its preparation method and application. Background technique [0002] With the increasingly serious environmental pollution and energy shortage, countries around the world are paying more and more attention to the sustainable development of energy and the environment. Hydrogen energy is a very clean secondary energy that has advantages over traditional energy sources. The large-scale utilization of hydrogen energy involves three corresponding links: hydrogen production, storage and transportation, and application. However, the flammable and explosive nature of hydrogen makes it difficult to find suitable containers or piping materials to store and transport it safely and efficiently. [0003] Ammonia is an ideal hydrogen carrier with the advantages of high hydrogen storage density, easy liquefaction, and mature production, storage and transportation technology. Compared ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63B01J23/83B01J37/00B01J37/08B01J37/02B01J37/18B01D53/86B01D53/58
CPCB01J23/002B01J23/63B01J23/83B01J37/0036B01J37/088B01J37/082B01J37/08B01J37/0201B01J37/18B01D53/8634B01D2256/16B01D2257/406Y02A50/20
Inventor 唐浩东杜傲侠李利春韩文锋李瑛刘宗健
Owner ZHEJIANG UNIV OF TECH
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