Method for preparing carbon monoxide low-shift catalyst by far infrared roasting

Abstract

The invention relates to the field of preparation of a carbon monoxide low-shift catalyst, and relates to a process for producing the carbon monoxide low-shift catalyst by using a far infrared roasting method. According to the far infrared roasting method, electric energy is used for heating in a far infrared heating tube, through an accurate temperature control technology, the temperature of a hearth reaches a specified operating temperature, the fluctuation of the temperature is controlled within a set range, dried particle materials are roasted, and basic carbonate is decomposed into copper, zinc and aluminum oxides. The roasting temperature of each section is adjusted to the set temperature, the temperature fluctuation is within the allowable positive and negative value range, the far infrared running speed is set, and the fed materials are uniformly distributed into the chain disc. The low-shift catalyst produced by the far infrared roasting method has the advantages of uniform burning weight loss, ideal pore structure, more than or equal to 70% of pores of 10-20 nm, total specific surface area of more than 100 m < 2 > / g, stable catalyst performance, more than or equal to 85% of activity of carbon monoxide after heat resistance, and low bulk density.

Description

technical field [0001] The invention relates to a preparation method of a carbon monoxide low-swing catalyst, in particular to a preparation method of a carbon monoxide low-swing catalyst by adopting a far-infrared roasting process. Background technique [0002] There are many kinds of carbon monoxide low-swing catalyst components, and copper-zinc-aluminum series is commonly used in industrial production, and its active center is copper microcrystals produced after copper oxide is reduced; The destruction of the active center; alumina can improve the strength of the catalyst and increase the specific surface. The preparation of copper-zinc-aluminum catalysts generally adopts the co-precipitation method. The nitrate mixed solution of copper, zinc, and aluminum is neutralized and precipitated with sodium carbonate, sodium bicarbonate or ammonium bicarbonate, and then washed, dried, and ground. , and then enter the roasting process. The material obtained after roasting is mix...

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Problems solved by technology

Rotary calciners generally use liquefied petroleum gas, coal or electric heating as heat sources for heating. There are problems of uneven roasting, which may easily lead to catalyst sintering or insufficient decomposition of materials; in addition, it is difficult to achieve precise temperature control, resulting in temperature fluctuations. Large fluctuations can adversely affect the grain and pore structure of the catalyst

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