Method for preparing carbon monoxide low-shift catalyst by far infrared roasting
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A far-infrared and carbon monoxide technology is applied in the field of preparation of carbon monoxide low-change catalysts, which can solve the problems of catalyst sintering, insufficient material decomposition, large temperature fluctuations, etc., and achieve the effects of stable catalyst performance, ideal pore structure, and uniform loss on ignition.
Pending Publication Date: 2021-07-09
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
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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 decomp
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[0035] Example 1
[0036] The precipitation method was obtained from copper-zinc aluminum three-membered materials, washing and filtration, wet filter cake, wet filter cake was processed, dried, and crushed. Weigh 400 kg of dry material (consistency of material basic parameters), invested in far red exterior reservoirs, adjust the temperature of each segment temperature zone temperature to 330 ° C, set control speed 550R / min, adjust the amount of material to 100 kg / h, Adjust the lower tank squeegee, uniform speed, so that the thickness mean of the chain plate tape material is 20 mm ± 2㎜, runs 2 h, and sampling.
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[0037] Example 2
[0038] The precipitation method was obtained from copper-zinc aluminum three-membered materials, washing and filtration, wet filter cake, wet filter cake was processed, dried, and crushed. Weigh 400 kilograms of dry materials (consistency of material basic parameters), invested in far red-exterior reservoirs, adjust the temperature of each segment temperature zone temperature to 350 ° C, set control speed 550R / min, adjust the amount of material to 100 kg / h, Adjust the lower tank squeegee, uniform speed, so that the thickness mean of the chain plate tape material is 20 mm ± 2㎜, runs 2 h, and sampling.
Example Embodiment
[0039] Example 3
[0040] The precipitation method was obtained from copper-zinc aluminum three-membered materials, washing and filtration, wet filter cake, wet filter cake was processed, dried, and crushed. Weigh 400 kg of dry material (consistency of material basic parameters), invested in far red exterior reservoirs, adjust the temperature of each segment temperature zone temperature to 320 ° C, set control speed 600R / min, adjust the amount of material to 100kg / h, Adjust the lower tank squeegee, uniform speed, so that the thickness mean of the chain plate tape material is 20 mm ± 2㎜, runs 2 h, and sampling.
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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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