Cobalt-based reforming catalyst and modifying preparation method thereof

Abstract

The invention provides a cobalt-based reforming catalyst and a modifying preparation method thereof. The modifying preparation method comprises the following steps: pouring Co(NO3)2-6H2O solution into aluminum oxide to soak, thereby obtaining a catalyst precursor; and roasting the obtained catalyst precursor, grinding the catalyst precursor into particles, and reducing the particles under H2 atmosphere, thereby obtaining the cobalt-based reforming catalyst. The obtained cobalt-based reforming catalyst is finally placed into hydrochloric acid solutions with different concentrations, through the selective corrosion of the hydrochloric acid, a cobalt species which are in intermediate mutual action with an aluminum oxide carrier and show relatively high activity in stream reforming reaction are kept, metal cobalt which enables the catalyst to be quickly inactivated as steam reforming reaction easily generates side reaction is inhibited, and the cobalt-based reforming catalyst is prevented from being quickly inactivated, so that stability of the catalyst is improved.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst in the hydrogen production process by steam reforming, and in particular to a method for modifying and preparing a cobalt-based reforming catalyst. Background technique [0002] Hydrogen is a clean fuel that can be used in fuel cells. Although hydrogen can be produced using fossil energy sources such as natural gas, oil, and coal decades ago, there are problems such as energy depletion and environmental pollution when using them in large quantities to produce hydrogen. Using renewable resources to reform hydrogen production, such as biomass cracking oil (biomass oil) for steam reforming hydrogen production, has no net carbon dioxide emissions, and has very little nitrogen oxide and sulfur oxide emissions. Due to its environmental friendliness, it has gradually become the focus of research in the field of hydrogen production. [0003] Hydrogen production by steam re...

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Problems solved by technology

[0003] Hydrogen production by steam reforming of organic matter is carried out under the action of catalyst, Co / Al 2 o 3 It is a catalyst widely used in steam reforming of organic matter to produce hydrogen. In the process of steam reforming of bio-oil, the catalyst is easy to form carbon deposits, which leads to its rapid deactivation in the process of steam reforming

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