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Coke-oven gas hydrodesulfurization catalyst as well as preparation method and application thereof

A hydrodesulfurization and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Production cost and other issues, to achieve the effect of performance improvement, good mass transfer, and low cost

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when used for coke oven gas desulfurization, it is easy to cause CO disproportionation and carbon deposition, which affects the service life of the catalyst. In actual production, the catalyst needs to be replaced frequently, thereby increasing production costs.

Method used

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  • Coke-oven gas hydrodesulfurization catalyst as well as preparation method and application thereof
  • Coke-oven gas hydrodesulfurization catalyst as well as preparation method and application thereof

Examples

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preparation example Construction

[0067] In the preparation method of the present invention, the nitrate is selected from one or more of aluminum nitrate, zirconium nitrate, lanthanum nitrate and yttrium nitrate. Nitrate ions in nitrate can promote the oxidant that can be used as a pore-forming agent under high temperature conditions, and they undergo self-propagating combustion reactions at high temperatures to generate gas and steam, making the oxide material form a cavity.

[0068] In the preparation method of the present invention, the peptizer is selected from one or more of acids, bases and salts. Acids wherein can be selected for use: inorganic acid (such as hydrochloric acid, sulfuric acid, nitric acid etc.), organic acid (formic acid, acetic acid, oxalic acid etc.) and the combination of one or more in inorganic acid or organic acid; Base class can be selected for use: Inorganic base (sodium hydroxide, potassium hydroxide, barium hydroxide, calcium hydroxide, aluminum hydroxide, lithium hydroxide, mag...

Embodiment 1

[0118] Add 20kg of deionized water to the reaction kettle, add 4.0kg of pseudo-boehmite powder (Shandong), stir and mix evenly for about 10 minutes; add 200g of nitric acid, grind for about 10 minutes; add 2.3kg of PEG4000, continue beating, and stir and age at 25°C After 1.5 hours, the above slurry was transported to the spray dryer. The atomization pressure of the spray dryer was 2.5Mpa, the inlet temperature of the atomization dryer was 580°C, and the outlet temperature was 130°C. The outlet flows out to obtain microsphere particles. The obtained product was calcined at 600°C to obtain the material ZT1 that can be used as a catalyst carrier, and the prepared microspheres were characterized by scanning electron microscopy. The results of the electron microscopy are as follows: figure 1 shown. Its physical properties are listed in Table 1.

Embodiment 2

[0126] Add 20kg of deionized water into the reaction kettle, add 4.6kg of pseudoboehmite powder (Changling), stir and mix evenly for about 10min; add 175g of nitric acid, grind for about 10min; add 2.0kg of PEG4000, add 0.5kg of zirconium nitrate, Then add nitroglycerin 5g, continue beating, stir and age at 25°C for 0.5 hour, and deliver the above slurry to the spray dryer, the atomization pressure of the spray dryer is 2.5Mpa, the inlet temperature of the atomizer dryer is 560°C, and the outlet temperature is At 140°C, after 2-5 seconds, it flows out from the outlet of the atomization dryer to obtain raspberry-shaped microsphere particles. The obtained product was calcined at 500°C to obtain a material ZT2 that can be used as a catalyst carrier, and its physical properties are shown in Table 1.

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Abstract

The invention discloses a coke-oven gas hydrodesulfurization catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and an active metal component loaded on the carrier, the active metal component comprises molybdenum and VIII group metal, and the carrier is raspberry type oxide microspheres; the molybdenum content is 10-45 wt% in terms of oxide and on the basis of the catalyst; the content of the group VIII metal is 1 to 16 wt% ; and the content of the carrier oxide is 39-89 wt%. The raspberry type oxide microspheres have better mass transfer and heat transfer characteristics, the strength of the raspberry type oxide microspheres is remarkably higher than that of existing products of similar structures, and meanwhile the preparation method is simple, low in cost, high in efficiency and suitable for large-scale industrial application. The coke-oven gas hydrodesulfurization provided by the invention adopts raspberry type carrier alumina as a carrier, so that the performance of the catalyst is improved.

Description

technical field [0001] The application relates to a coke oven gas hydrogenation desulfurization catalyst and its preparation method and application. Background technique [0002] Coke oven gas is a by-product of coking in coking plants, and its main components are methane, hydrogen, carbon monoxide and carbon dioxide. The recovery and utilization of coke oven gas plays an important role in the clean utilization of coal resources in our country. The existence of sulfide in coke oven gas will cause corrosion of subsequent industrial pipelines and equipment, and reduce the activity of pure oxygen conversion catalyst in the reformer (the main active component of the conversion catalyst is Ni, which can react with sulfide to form NiS, resulting in a decrease in activity). The increase of residual methane content in the outlet gas will increase the energy consumption of the whole device, and will also poison and deactivate the methanol synthesis catalyst (the active component Cu ...

Claims

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Application Information

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IPC IPC(8): B01J21/04B01J23/882B01J23/887B01J35/02B01J35/08B01J35/10C10K1/34
CPCB01J23/8872B01J23/8873B01J23/882B01J21/04C10K1/34B01J35/50B01J35/51B01J35/635B01J35/647B01J35/615
Inventor 孙霞吴玉侯朝鹏褚阳刘锋李学锋张荣俊夏国富阎振楠徐润王鹏飞邹亮
Owner CHINA PETROLEUM & CHEM CORP
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