Preparation method of carbon material-supported ruthenium metal catalyst containing barium auxiliary agent

A technology of metal catalysts and ruthenium catalysts, which is applied in the field of preparation of ruthenium catalysts, can solve problems affecting the stability of ruthenium catalysts and ammonia synthesis activity, and achieve good industrial application prospects, improved activity, and superior heat resistance.

Inactive Publication Date: 2016-03-23
FUZHOU UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Especially under high-temperature and high-hydrogen ammonia synthesis conditions, the carbon gasification reactions such as methane and carbon monoxide produced by

Method used

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  • Preparation method of carbon material-supported ruthenium metal catalyst containing barium auxiliary agent

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Experimental program
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Effect test

Embodiment 1

[0018] Take 5g of graphitized activated carbon, impregnate an equal volume of 0.05g / mL ruthenium chloride solution to a mass ratio of Ru:C of 0.10:1, dry at 120°C for 4 hours; reduce in a hydrogen atmosphere at 500°C for 6 hours , cooled to room temperature in the above atmosphere; impregnated the obtained sample with barium nitrate aqueous solution to a molar ratio of Ba to Ru of 0.6:1, dried at 120°C for 4 hours; heat-treated at 500°C in methane gas for 2 hours, after cooling It can be reduced at 430°C for 6 hours in a hydrogen atmosphere.

Embodiment 2

[0020] Take 5g of graphitized activated carbon, impregnate an equal volume of 0.05g / mL ruthenium chloride solution to a mass ratio of Ru:C of 0.10:1, dry at 120°C for 4 hours; reduce in a hydrogen atmosphere at 500°C for 6 hours , cooled to room temperature in the above-mentioned atmosphere; impregnating the obtained sample with barium nitrate aqueous solution to a molar ratio of Ba to Ru of 0.6:1, and drying at 120°C for 4 hours; : 1) Heat treatment at 500°C for 2 hours, then reduce in hydrogen atmosphere at 450°C for 6 hours after cooling.

Embodiment 3

[0022] Take 5g of graphitized activated carbon, impregnate an equal volume of 0.05g / mL ruthenium chloride solution to a mass ratio of Ru:C of 0.08:1, dry at 120°C for 4 hours; reduce in a hydrogen atmosphere at 500°C for 6 hours , cooled to room temperature in the above-mentioned atmosphere; impregnated the obtained sample with barium nitrate aqueous solution to a molar ratio of Ba to Ru of 0.3:1, and dried at 120°C for 4 hours; : 1) heat treatment at 400°C for 30 hours, and then reduce in a hydrogen atmosphere at 450°C for 16 hours after cooling.

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Abstract

The invention provides a preparation method of a carbon material-supported ruthenium metal catalyst containing a barium auxiliary agent and relates to a preparation method of a catalyst taking a carbon material as a carrier, ruthenium metal as an active component and barium as an auxiliary agent. The preparation method particularly comprises the following steps: firstly, impregnating a ruthenium metal loaded carbon material into a barium nitrate water solution and carrying out reduction treatment under a certain temperature; treating the sample at a certain temperature range under the condition that carbon-containing gas exists; finally, reducing in a hydrogen atmosphere or nitrogen-hydrogen mixed gas to obtain the carbon material-supported ruthenium catalyst containing the barium auxiliary agent. Compared with the carbon material-supported ruthenium metal catalyst containing the barium auxiliary agent, which is prepared by an existing method, the catalyst provided by the invention has relatively high ammonia synthesis activity and heat stability and a relatively good application prospect.

Description

Technical field [0001] The present invention involves a preparation technique of nitrogen and hydrogen synthetic ammonia in the synthetic ammonia industry in the field of chemical fertilizers. Specifically, it is a preparation method for carbon materials containing carbon -containing assistants. Background technique [0002] 优 Catalyst is hailed as the second -generation ammonia synthetic catalyst after its excellent performance. Among them, the catalyst with activated carbon as the carrier has high ammonia synthesis activity and has good industrial application prospects.The catalysts used to synthesize ammonia are usually composed of three parts: carrier, active metal 钌, and auxiliary agent. At present, the catalyst catalysts that are more applied in the application prospects include three components: graphized carbon carrier, cricket metal, and pyrine.US4600571, US7115239, GB2034194, CN100448529C, CN1133492C, CN1299823C, CN101322947A, CN101362080A, CN101579627B and other patent...

Claims

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Application Information

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IPC IPC(8): B01J23/58C01C1/04
CPCY02P20/52B01J23/58B01J2523/25B01J2523/821C01C1/0411
Inventor 林炳裕郭云杰林建新倪军江莉龙
Owner FUZHOU UNIVERSITY
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