Application of bimetallic alloy in anti-carbon-deposition methane steam reforming catalyst

Abstract

The invention discloses a bimetallic alloy for an anti-carbon-deposition methane steam reforming catalyst, the bimetallic alloy is composed of two metals, the general formula is AxBy, A is one of Fe,Co and Ni, and B is one of Ga, Zn and Sn; and 3y > = x > = y; the invention also relates to an application of the bimetallic alloy in the anti-carbon-deposition methane steam reforming catalyst. The invention has the beneficial effects that Fe, Co, Ni and Ga, Sn and Zn alloys are used as methane steam reforming catalysts, so that the price is low; Fe, Co, Ni, Ga, Sn and Zn have a large number of stable alloy phases, and the synthesis method is simple; the activation sites on the surface of the alloy are moderate in carbon and oxygen adsorption capacity and have high methane steam reforming activity; as sites with strong carbon adsorption capacity and sites with weak adsorption capacity on the surface of the alloy appear alternately, carbon atoms on the surface are dispersed on the surfaceof the catalyst, and the catalyst has good carbon deposition resistance.

Description

technical field [0001] The invention relates to a bimetallic alloy, in particular to the application of the bimetallic alloy in a carbon-deposition-resistant methane water vapor reforming catalyst, and belongs to the technical field of carbon-deposition-resistant methane water vapor reforming catalysts. Background technique [0002] At present, the world's energy is scarce, and hydrogen is an important green new energy. As an economical and efficient hydrogen production method, methane steam reforming has attracted more and more attention from domestic and foreign researchers. For example, in the document Journal of Catalysis, 1993, 144(1): 38-49, J.R.Rostrup-Nielsen and J-H.Bak Hansen proved through experiments that Ni has a high methane steam reforming activity, but the surface is extremely easy to deposit carbon; The noble metals Pt and Pd have good methane steam reforming activity and can resist carbon deposition. However, the price of precious metals limits their appli...

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Problems solved by technology

[0003] In addition, in the literature Journal of Power Sources 242(2013) 762-767, P.Zuo et al. proposed to use the combination of C* and C* on the catalyst surface to form The activation energy of C2* molecules judges the anti-carbon deposition performance of the catalyst, and successfully demonstrates that NiAu, NiAg and NiCu alloys have the ability to resist carbon deposition through density functional theory calculations; however, they ignore The fact that NiAu contains precious metals, is expensive, and that NiAg and NiCu alloy phases cannot exist stably

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