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

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...

AI Technical Summary

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 activated carbon supports are unavoidable, which seriously affects the stability and ammonia synthesis activity of activated carbon-supported ruthenium catalysts.

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