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Preparation method of catalyst

A technology of catalyst and catalytic activity, applied in the preparation of organic compounds, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of deactivation, carbon deposition, poor stability, etc., and achieve the effect of good catalytic performance

Pending Publication Date: 2020-02-04
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, these catalysts are prone to carbon deposition during the reaction, resulting in deactivation and poor stability at high temperatures.

Method used

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  • Preparation method of catalyst
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Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: preparation embodiment

[0033] Based on the principle of isotope separation, the natural metal platinum powder is separated by the CAE-1 magnetic separation device of the Institute of Nuclear Technology, China Institute of Atomic Energy (the natural abundance of platinum isotope is: Pt-190 is 0.01%, Pt-192 is 0.79% , Pt-194 is 32.9%, Pt-195 is 33.8%, Pt-196 is 25.3%, Pt-198 is 7.2%), the specific operating conditions are: vaporization temperature 2500 degrees, magnetic field voltage 1000 volts, magnetic separation parameter Pt- 195-98. The separated platinum was collected at the outlet, and detected by ICP-MS, the abundance of Pt-194 was 1.5%, the abundance of Pt-195 was 98%, and the abundance of Pt-196 was 0.5%.

[0034] Add 4 times the mass of conductive graphite as a carbon source to the above separated platinum, and through the hydrothermal method (weigh the salt of the catalytically active substance and dissolve it in deionized water, add the carrie...

Embodiment 2

[0035] Embodiment 2: preparation embodiment

[0036] Based on the principle of isotope separation method, the natural metal platinum powder is separated through the CAE-1 magnetic separation device of the Institute of Nuclear Technology, China Institute of Atomic Energy. The specific operating conditions are: vaporization temperature 2500 degrees, magnetic field voltage 1000 volts, magnetic separation parameters Pt-190 -20. The separated platinum is collected at the outlet, and detected by ICP-MS, the abundance of Pt-190 is 20%, the abundance of Pt-194 is 50%, and the abundance of Pt-198 is 30%.

[0037] 4 times the mass of conductive graphite was added to the platinum after the above separation as a carbon source. After hydrothermal method (weigh the salt of the catalytic active material, dissolve it in deionized water, add the carrier conductive graphite, immerse it for 1h, keep it at 40°C for 2h, 80 drying at ℃ to obtain catalyst precursor. A small amount of urea solution wa...

Embodiment 3

[0038] Example 3: Preparation Example

[0039] Based on the principle of isotope separation method, the natural metal platinum powder is separated by the CAE-1 magnetic separation device of the Institute of Nuclear Technology, China Institute of Atomic Energy. -100. The separated platinum was collected at the discharge port, and detected by ICP-MS, the abundance of Pt-190 was 100%.

[0040] Add 4 times the mass of conductive graphite as a carbon source to the platinum after the above separation to prepare a Pt / C catalyst with a mass fraction of Pt of 20%. The specific preparation method is as follows:

[0041] Preparation of metal Pt into H 2 PtCl 6 solution, prepared as 1 mol / L of H 2 PtCl 6 . Add conductive graphite, stir evenly, use NaOH as a precipitant, adjust the pH to 7.5, and obtain a black precipitate by centrifugal washing, which is calcined at 500°C under hydrogen to obtain a catalyst.

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Abstract

The invention belongs to the technical field of catalysts and relates to a preparation method of a catalyst. The preparation method comprises the following steps: (1) preparation of catalytically active substances: preparing catalytically active substances or compounds thereof with changed isotopic compositions and / or abundances by using a suitable method; and (2) preparation of the catalyst: preparing the catalyst by using the catalytically active substances or the compounds thereof. The catalyst comprises the catalytically active substances, the catalytically active substances comprise at least one metal or a compound thereof, and a metal element in the metal or the compound of the metal is composed of a non-radioactive isotope with a changed composition and / or abundance compared with nature, wherein the abundance of at least one of the non-radioactive isotope is changed by 1 / 20 or above and not less than 20% on the basis of natural abundance. By using the preparation method of the catalyst, the obtained catalyst has better catalytic performance.

Description

technical field [0001] The invention belongs to the technical field of catalysts and relates to a preparation method of catalysts. Background technique [0002] Catalyst materials and catalytic technology are one of the basic and key materials and technologies for the development of today's chemical industry. In modern industry, the output value generated by the use of catalytic technology has accounted for about 30% of the total output value of the national economy. [0003] In Catalyst: [0004] Platinum catalysts are mainly used in the fields of inorganic chemical industry, petroleum refining, organic chemical industry, C1 chemical industry, fine chemical industry, automobile exhaust and industrial gas purification, as well as fuel cells and sensors, so they have great potential in industrial catalysis, environmental protection and green energy technology. Very important position, and shows broad application prospects. [0005] The price of ruthenium catalyst is relati...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/89C07C51/00C07C53/02
CPCB01J23/42B01J23/8946C07C51/00C07C53/02
Inventor 肖松涛欧阳应根叶国安刘协春王玲钰
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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