Perovskite catalyst used for autothermal reforming of ethanol for producing hydrogen and preparation method thereof

Abstract

The invention relates to a perovskite catalyst used for the autothermal reforming of ethanol for producing hydrogen and a preparation method thereof. Aiming at the problems of structural change, oxidation and sintering of active ingredients and deactivation of the conventional catalyst during the autothermal reforming of the ethanol, the invention provides a novel catalyst with sintering resistance, carbon deposit resistance, oxidation resistance and high activity. The chemical formula of the catalyst is LaaSrbNicXdO3, wherein X is one of Fe, Mn and Cr, a is 0.7 to 1.0, b is 0 to 0.3, c is 0.7 to 0.95 and d is 0.05 to 0.3. The nickel-based catalyst with an ABO3 perovskite structure is prepared by a glycine complexation method, lanthanum is partially substituted by strontium at a position A and nickel is partially substituted by an auxiliary agent at a position B, so oxygen defects and lattice structure defects on the surface of the perovskite catalyst are increased; meanwhile, the auxiliary agent, namely iron, magnesium or chromium is introduced, so the acidity of the catalyst is inhibited, the reducibility and stability of the active ingredients of the catalyst are improved, and the yield of the hydrogen is obviously improved and remains stable.

Description

technical field

[0001] The invention relates to a nickel-based catalyst for producing hydrogen by autothermal reforming of ethanol and a preparation method thereof, more specifically, to a nickel-based catalyst with a perovskite structure for producing hydrogen by autothermal reforming of ethanol The invention and a preparation method thereof belong to the technical field of producing hydrogen by autothermal reforming of ethanol. Background technique

[0002] Hydrogen is a clean and efficient energy carrier with a high energy density per unit mass, and its high calorific value is about 142.18MJ / kg, which is about 3.06 times that of gasoline (46.54MJ / kg). Hydrogen can be directly burned to convert hydrogen energy into heat energy; in addition, hydrogen can be directly converted into electrical energy with high efficiency through fuel cells, especially proton exchange membrane fuel cells. The production of hydrogen is traditionally produced by traditional methods such as coal...

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