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High-temperature proton membrane catalyst, and preparation method and application thereof

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

Active Publication Date: 2020-04-17
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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  • High-temperature proton membrane catalyst, and preparation method and application thereof
  • High-temperature proton membrane catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0028] 1) Weigh 3.487g of samarium oxide and 3.442g of cerium oxide, mix the samarium oxide and cerium oxide evenly, and then 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 500°C for 12 hours in an argon atmosphere, and then naturally cooled to room temperature. After the calcined product was ball-milled again, it was shaken and sieved. Calcined again at 1200°C for 10 hours to form a solid solution and obtain a dense ceramic film;

[0030]3) Weigh 0.28g RuCl 3 Dissolve in 5.0mL deionized water to prepare impregnating liquid, apply the impregnating liquid evenly on one side wall surface of the ceramic membrane obtained in step 2) to make it reach saturation of water absorption, after impregnating at room temperature for 12 hours, place in an oven at 110°C Dry for 12h. T...

Embodiment 2

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

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

[0034] 2) The powder obtained in step 1) was calcined at 600°C for 16 hours in an argon atmosphere, and then cooled to room temperature naturally. Calcined again at 1500°C for 15 hours to form a solid solution and obtain a dense ceramic film;

[0035] 3) Weigh 0.22g RuCl 3 Dissolve in 5.0mL deionized water to prepare impregnating liquid A, and apply impregnating liquid A evenly on one side wall surface of the ceramic membrane obtained in step 2) to make it reach water absorption saturation, and place it in an oven after immersing at room temperature for 12 hours Dry at 110°C for 12h. The above impregnation steps are repeated until the impregn...

Embodiment 3

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

[0039] 1) Weigh 3.365g of neodymium oxide and 3.442g of cerium oxide, mix the neodymium oxide and cerium oxide evenly, and then 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 naturally cooled to room temperature. After the calcined product was ball-milled again, it was vibrated and screened. Calcined again at 1400°C for 10 hours to form a solid solution and obtain a dense ceramic film;

[0041] 3) Weigh 0.28g RuCl 3 ·3H 2 O was dissolved in 5.0mL deionized water to prepare an impregnating solution, and the impregnating solution was uniformly drip-coated on one side wall of the ceramic membrane obtained in step 2) to make it reach saturated water absorption. After immersing at room temperature for 12 hours, place it in ...

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Abstract

The invention discloses a high-temperature proton membrane catalyst, and a preparation method and an application thereof. The high-temperature proton membrane catalyst comprises a high-temperature proton membrane carrier and metal M loaded on the high-temperature proton membrane carrier, the high-temperature proton membrane carrier is ABOx composite metal oxide, A represents a trivalent metal, B represents a tetravalent metal, and the molar ratio of A to B is 1:(0.5-5); and the metal M represents Ru, Fe or Ni, and the loading capacity of the metal M on the high-temperature proton membrane carrier is 0.5-10 wt.%. The high-temperature proton membrane catalyst has a good catalytic efficiency in an ammonia decomposition hydrogen production reaction, the conversion rate of ammonia decompositioncan reach 99.5% or above, and hydrogen separation can be achieved while ammonia decomposition hydrogen production is catalyzed.

Description

technical field [0001] The invention relates to a high-temperature proton membrane catalyst and its preparation method and application. Background technique [0002] With the increasing 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 source that has advantages that traditional energy sources do not have. The large-scale utilization of hydrogen energy involves three corresponding links of hydrogen production, storage and transportation, and application. However, the flammability and explosive characteristics of hydrogen determine that it is difficult to find suitable container or pipeline materials to store and transport it safely and efficiently. [0003] Ammonia is an ideal hydrogen carrier, which has the advantages of high hydrogen storage density, easy liquefaction, and mature production, storage and tra...

Claims

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Application Information

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Patent Type & Authority Applications(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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