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High airspeed iron desulfurizing agent, preparation method and application of desulfurizing agent

An iron-based desulfurization and space velocity technology, applied in the field of desulfurization, can solve the problems of low utilization rate of additives and inability of desulfurizers to apply high space velocity gas desulfurization, etc., to improve unit combination efficiency, increase effective contact area, and unit treatment The effect of volume increase

Active Publication Date: 2017-12-22
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the iron-based desulfurizer in the prior art has a low utilization rate of additives for improving desulfurization accuracy, so that the desulfurizer cannot be used for high space velocity gas desulfurization, thereby providing a Iron-based desulfurizer with high desulfurization precision and large space velocity that can be used for desulfurization at room temperature under high space velocity conditions and preparation method thereof

Method used

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  • High airspeed iron desulfurizing agent, preparation method and application of desulfurizing agent
  • High airspeed iron desulfurizing agent, preparation method and application of desulfurizing agent
  • High airspeed iron desulfurizing agent, preparation method and application of desulfurizing agent

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Embodiment 1

[0041] The high space velocity iron-based desulfurizer provided in this example has a raw material composition comprising: 60 g of high specific surface iron oxyhydroxide, 30 g of active zinc oxide, and 10 g of a 10 wt % aqueous solution of sodium carboxymethyl cellulose.

[0042] It is prepared by the following steps:

[0043] (1) 80 g of high specific surface iron oxyhydroxide, 20 g of active zinc oxide, and 25 g of a 10 wt % aqueous solution of sodium carboxymethylcellulose were mixed for solid-liquid kneading.

[0044](2) Extrude and granulate the mixture obtained in step (1), and then dry it at 50° C. for 1 hour to obtain a high space velocity iron-based desulfurizer.

[0045] The diameter of the desulfurizer is 4 mm, and the average radial crush resistance of the above-mentioned large space velocity iron-based desulfurizer particles is measured to be 51 N / cm.

Embodiment 2

[0047] The preparation method for preparing a large space velocity iron-based desulfurizer provided in this embodiment includes the following steps:

[0048] (1) 80 g of high specific surface iron oxyhydroxide, 20 g of active zinc oxide, and 25 g of a 10 wt % aqueous solution of sodium carboxymethylcellulose were mixed for solid-liquid kneading.

[0049] (2) Extrude and granulate the mixture obtained in step (1), and then dry it at 90° C. for 13 hours to obtain a high space velocity iron-based desulfurizer.

[0050] The diameter of the above-mentioned high space velocity iron-based desulfurizer is 4 mm, and the average radial crush resistance of the above-mentioned high space velocity iron-based desulfurizer particles is measured to be 52 N / cm.

Embodiment 3

[0052] The preparation method for preparing a large space velocity iron-based desulfurizer provided in this embodiment includes the following steps:

[0053] (1) Take 5 ball milling jars, add 18g of high specific surface iron oxyhydroxide and 1g of active zinc oxide into each ball milling jar, then turn on the ball mill for ball milling at a speed of 300 rpm, ball mill for 4 minutes, and let stand after ball milling After settling for 5 minutes, the mixed materials in the 5 ball mill jars were taken out.

[0054] (2) Combine the above-mentioned mixed materials taken out, and then add 40 g of a 5 wt % aqueous solution of sodium carboxymethylcellulose and mix for solid-liquid kneading.

[0055] (3) The mixture obtained by kneading is extruded and granulated, and then dried at 60° C. for 24 hours to obtain a high space velocity iron-based desulfurizer.

[0056] The diameter of the above-mentioned high space velocity iron-based desulfurizer is 4 mm, and the average radial crush r...

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Abstract

The invention belongs to the technical field of desulfurization and particularly relates to a high airspeed iron desulfurizing agent, a preparation method and application of the desulfurizing agent. The desulfurizing agent provided by the invention takes activated zinc oxide with nanoparticle small size effect as an additive; the additive is fully utilized; when hydrogen sulfide molecules escape under the condition that a hydroxyl ferric oxide component is combined with hydrogen sulfide till reaching a saturated state, the activated zinc oxide can react with the escaping hydrogen sulfide; a compound active center is formed under the interaction of the hydroxyl ferric oxide and the activated zinc oxide, and the desulfurizing precision is effectively improved; meanwhile, the compound active center also can effectively accelerate the combining of the desulfurizing agent and the hydrogen sulfide molecules and the unit handling capacity of the desulfurizing agent can be increased. The desulfurizing agent provided by the invention can meet the high airspeed desulfurizing requirement; the desulfurizing precision is high; the hydrogen sulfide content in the desulfurized gas is smaller than 0.1ppm; the penetrating sulfur capacity under the airspeed of 6000h-1 under room temperature can reach up to 33%.

Description

technical field [0001] The invention belongs to the technical field of desulfurization, and in particular relates to a preparation method and application of a large space velocity iron-based desulfurizer. Background technique [0002] Hydrogen sulfide gas is produced in many industrial fields such as petroleum refining, gas production, synthetic ammonia, sewage treatment, etc. The existence of hydrogen sulfide will not only cause serious corrosion to metal pipelines and equipment, but also bring production safety accidents. Cause catalyst poisoning, increase the use of catalyst and regeneration cost. In addition, if these hydrogen sulfide gases are discharged into the atmosphere, they will also cause environmental pollution and endanger human health. Therefore, it is very necessary to collect and separate hydrogen sulfide gas in time during the production process. At present, wet desulfurization and dry desulfurization are widely used to remove hydrogen sulfide in gas. Am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/52
CPCB01D53/52B01D53/81B01D2251/602
Inventor 樊俐
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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