Biomass gasification tar vapor translation hydrogen making catalyst and preparation method thereof

Abstract

The invention belongs to the filed of energy sources and chemical industry and in particular relates to a catalyst used for hydrogen production from biomass gasified tar steam reforming and a preparation method thereof. The catalyst takes palygorskite as a carrier and nickel as a main active component for the steam reforming, and contains the promoter components such as iron, potassium, aluminum and the like, and the mass percentage of each component is as follows: the content of NiO is 3 - 30%, that of Fe2O3 is 3 - 20%, that of Al2O3 is 3 -2 5%, and that of K2O is 1 - 10%; the mass percentage of the palygorskite is 60 - 95%. The catalyst is prepared by a co-precipitation absorption method, in which the active components of nickel, iron, aluminum and potassium are loaded on the surface of the palygorskite in the manner of co-precipitation and absorption, and then are filtered, shaped, dried and calcined to obtain a finished catalyst. The catalyst has good activity stability and self-reduction property at the high temperature of 800 DEG C, is applicable to the steam reforming process of tar with biomass or coal gasified gas as a catalyst, and can also be used for hydrogen production reaction via hydrocarbon steam reforming.

Description

technical field [0001] The invention belongs to the field of energy and chemical industry, and in particular relates to a catalyst and a preparation method applicable to the in-situ catalyzed water vapor conversion process of tar in a recycled biomass moving bed gasification furnace or a fluidized bed gasification furnace. Background technique [0002] The present invention is an improvement of the prior art Chinese Invention Patent Publication CN 101172232A. CN 101172232A provides a Ni-Fe / palygorskite catalyst for steam conversion of biomass tar with low-temperature activity and a preparation method thereof. The disadvantage is that although the catalyst exhibits high activity at 480-650°C, the catalyst is prone to gradually deactivate during repeated use at around 800°C. Changes, on the other hand, because the higher content of active components nickel and iron will migrate and grow under high temperature reducing conditions, and the coalescence of active components will ...

AI Technical Summary

Problems solved by technology

The disadvantage is that although the catalyst exhibits high activity at 480-650°C, the catalyst is prone to gradually deactivate during repeated use at around 800°C. The reason is that palygorskite itself dehydrates at high temperatures or its structure On the other hand, because the higher content of active components nickel and iron will migrate and grow under high temperature reducing conditions, the coalescence of active components will lead to the reduction of catalyst activity

On the other hand, the low-temperature reducibility and high-temperature activity stability of catalysts are a pair of contradictions, and they are also problems that need to be solved.

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