Sulphur resistant carbon monoxide transfer catalyst and preparation thereof

Abstract

The invention discloses a sulfur resistant carbon monoxide shift catalyst and a preparation method thereof, relates to a carbon monoxide shift catalyst, and provides a sulfur resistant carbon monoxide shift catalyst which is applicable under wide operation conditions with high voltage and steam-gas ratio or low voltage and steam-gas ratio and a preparation method thereof. The active components consist of a Mo compound expressed in MoO3, Co compound expressed in CoO and K compound expressed in K2O, with magnesium aluminate spinel MgAl2O4 as the carrier. According to mol ratio 1:1 of light MgO and aluminum oxide, the light MgO and the porous, aqueous and amorphous aluminum oxide are put in a mix and pinch machine; the aqueous solution of nitrate acid is added in for mixing and pinching, to form a plastic body; the plastic body is extruded, shaped, dried and baked, to obtain the porous MgAl2O4 carrier is obtained. Hoevelite, cobalt salt, ammonium mloybdate and a complex stabilizer are dissolved by water, and the pH value of the solution is regulated by ammonia water; the measured MgAl2O4 carrier is soaked by the prepared mixed solution, and dried.

Description

technical field [0001] The invention relates to a carbon monoxide shift catalyst, in particular to a sulfur-resistant carbon monoxide shift catalyst suitable for wide operating conditions and a preparation method thereof. Background technique [0002] Carbon monoxide shift reaction is widely used in ammonia synthesis, methanol synthesis and hydrogen production industry. This reaction can only have a considerable rate in the presence of a catalyst. There are two main types of catalysts initially used for the reaction: one is a Cu-Zn catalyst suitable for low temperature conditions, but it is easy to lose activity under high temperature conditions and will be poisoned by sulfur in the synthesis gas; the other is suitable for high temperature Conditional Fe-Cr catalyst, but it has the disadvantages of poor low-temperature activity (generally activated at 300°C), poor anti-toxicity, and chromium is harmful to the human body. In order to solve the above problems, Co-Mo series su...

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Problems solved by technology

This type of catalyst has good activity at high pressure and high steam-gas ratio, but its activity at low temperature is poor, and its activity decreases rapidly at low pressure and low steam-gas ratio

Therefore, the above-mentioned catalysts can only be effectively operated under specific conditions, and cannot be used as full-low shift catalysts for medium and low-pressure shift systems. Moreover, with the gradual adoption of different raw material routes and the improvement of the production process of large-scale synthetic ammonia plants, the original catalysts cannot adapt to new ones. operating environment

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