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PtNi/C bimetallic catalyst and preparation method thereof

A bimetallic catalyst, catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of limited application and high price of Pt, and achieve the The effect of conversion rate, efficiency improvement, and production cost reduction

Active Publication Date: 2019-01-18
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pt is an excellent hydrogenation catalyst. There are many reports on Pt as a catalyst for hydrogenation reactions, but the high price of Pt limits its application in industrial production.

Method used

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  • PtNi/C bimetallic catalyst and preparation method thereof
  • PtNi/C bimetallic catalyst and preparation method thereof
  • PtNi/C bimetallic catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of PtNi / C catalyst specifically comprises the steps:

[0029] (1) Weigh 50g of activated carbon to elute the dust in boiling deionized water for 2h, add 400mL of nitric acid solution with a mass fraction of 10% after centrifugation, stir at 80°C for 5h, filter and wash the activated carbon with water until pH = 7, 60°C dry overnight;

[0030] (2) Add 1 g of activated carbon treated in step (1) into 20 mL of deionized water, then add 0.08 g of chloroplatinic acid and 0.148 g of nickel nitrate into the activated carbon aqueous solution, stir at room temperature for 24 h, centrifuge and dry overnight at 60 ° C , to obtain the catalyst precursor;

[0031] (3) Reducing the catalyst precursor obtained in step (2) in a hydrogen atmosphere at 400° C. for 2 h to obtain a Pt(3)Ni(3) / C catalyst.

Embodiment 2

[0033] The preparation method of PtNi / C catalyst specifically comprises the steps:

[0034] (1) Weigh 50g of activated carbon to elute the dust in boiling deionized water for 2h, add 400mL of nitric acid solution with a mass fraction of 10% after centrifugation, stir at 80°C for 3h, filter and wash the activated carbon with water until pH = 7, 60°C dry overnight;

[0035] (2) Add 1 g of activated carbon treated in step (1) into 20 mL of deionized water, then add 0.08 g of chloroplatinic acid and 0.148 g of nickel nitrate into the activated carbon aqueous solution, stir at room temperature for 24 h, centrifuge and dry overnight at 60 ° C , to obtain the catalyst precursor;

[0036] (3) Reducing the catalyst precursor obtained in step (2) at 450° C. for 1 h in a hydrogen atmosphere to obtain a Pt(3)Ni(3) / C catalyst.

Embodiment 3

[0038] The preparation method of PtNi / C catalyst specifically comprises the steps:

[0039] (1) Weigh 50g of activated carbon to elute the dust in boiling deionized water for 2 hours, add 400mL of nitric acid solution with a mass fraction of 10% after centrifugation, stir at 80°C for 4h, filter and wash the activated carbon with water until pH = 7, 60°C dry overnight;

[0040] (2) Add 1 g of activated carbon treated in step (1) into 20 mL of deionized water, then add 0.08 g of chloroplatinic acid and 0.148 g of nickel nitrate into the activated carbon aqueous solution, stir at room temperature for 24 h, centrifuge and dry overnight at 60 ° C , to obtain the catalyst precursor;

[0041] (3) Reducing the catalyst precursor obtained in step (2) in a hydrogen atmosphere at 350° C. for 3 h to obtain a Pt(3)Ni(3) / C catalyst.

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Abstract

The invention provides a PtNi / C bimetallic catalyst and a preparation method thereof. The preparation method comprises the following steps: (1) adding pretreated activated carbon into a nitric acid solution, heating to a temperature of 75-85 DEG C, uniformly stirring, filtering and washing the activated carbon until the pH value is 7, and drying the washed activated carbon; (2) adding the activated carbon into deionized water, sequentially adding chloroplatinic acid and nickel nitrate to be uniformly stirred so as to obtain a catalyst precursor solution, centrifuging the catalyst precursor solution, and drying to obtain a catalyst precursor; (3) reducing the catalyst precursor in a hydrogen atmosphere of 400 DEG C for 2 hours, thereby obtaining the PtNi / C bimetallic catalyst. The bimetallic catalyst provided by the invention has large specific surface area and high reaction activity, and is capable of catalyzing selective hydrogenation of furfural in an aqueous phase at a normal temperature, the reaction efficiency is greatly improved, the reactive energy consumption is reduced, aqueous phase catalysis is realized, and the bimetallic catalyst has excellent economic value and environmental protection significance.

Description

Technical field: [0001] The invention relates to the technical field of catalyst design, in particular to a PtNi / C bimetallic catalyst and a preparation method thereof. Background technique: [0002] With the improvement of people's living standards and the increase of population density, fossil fuels can no longer meet people's needs. Therefore, the development of new renewable energy will become a necessary trend for future development. Biomass energy has attracted more and more attention from researchers due to its advantages of various types and large quantities. Furfural is an important platform compound derived from lignocellulose. A series of chemical substances such as furfuryl alcohol, tetrahydrofurfuryl alcohol, furan, tetrahydrofuran, 2-methylfuran, 2-methyltetrahydrofuran, 1,4-pentanediol, etc. can be produced by selective hydrogenation. Among these chemical substances, tetrahydrofurfuryl alcohol is an important chemical raw material, which can be used to prepa...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J37/02B01J37/18C07D307/12
CPCB01J23/892B01J37/0201B01J37/18C07D307/12
Inventor 王晨光吴景程张兴华陈强徐莹刘琪英张琦马隆龙
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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