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Active carbon used for adsorbing and removing sulfides in gasoline, and preparation method thereof

A technology of activated carbon and sulfide, applied in chemical instruments and methods, refined hydrocarbon oil, petroleum industry, etc., can solve the problems of high cost, low selective adsorption performance, easy to cause pollution, etc., and achieve low cost, selective adsorption Excellent, little pollution effect

Active Publication Date: 2011-09-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the above-mentioned activated carbon preparation method, whether petroleum coke or coal or a mixture of the two is used as raw material, or activated carbon prepared by physical activation or chemical activation, its selective adsorption performance is not high.
Although the chemical activation method can produce activated carbon with high specific surface area, it needs to use strong alkali as the activator, which is costly and easy to cause pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Mix 5 parts of petroleum coke and 2 parts of coal and crush it into 100-200 mesh powder, preheat to 50°C, add 3 parts of binder and stir and mix, and add 0.5 part of water during the mixing process. The binder is a mixture of propane deasphalting and catalytic cracking oil slurry in a ratio of 2:1.

[0037] Then add 0.5 part of pore-forming agent, stir and mix, knead and shape to make strips with a diameter of 3 mm, and then air-dry. The pore former is ferrocene.

[0038] The molding material enters the carbonization process, the carbonization furnace heats up at a rate of 5°C / min, the carbonization temperature is controlled at 500°C, and the carbonization is carried out for 3 hours. Then enter the activation process, the temperature is raised at a rate of 15°C / min, the activation temperature is controlled at 900°C, and the activation is performed for 10 hours. The activation medium is water vapor.

[0039]The activated product was oxidized with nitric acid with a co...

Embodiment 2

[0044] Mix 4 parts of petroleum coke and 4 parts of coal and crush it into 100-200 mesh powder, preheat to 50°C, add 2 parts of binder and stir and mix, and add 0.5 part of water during the mixing process. The binder is formed by mixing coal tar pitch and catalytic cracking oil slurry in a ratio of 2:1.

[0045] Then add 1 part of pore-forming agent, stir and mix, knead, and shape to make a disc with a diameter of 10 mm, and then dry it. The pore former is furfuryl alcohol.

[0046] The molding material enters the carbonization process, the carbonization furnace heats up at a rate of 5°C / min, the carbonization temperature is controlled at 600°C, and the carbonization takes 4 hours. Then enter the activation process, the temperature is raised at a rate of 15°C / min, the activation temperature is controlled at 850°C, and the activation is performed for 12 hours. The activation medium is water vapor.

[0047] The activated product was oxidized with nitric acid with a concentrat...

Embodiment 3

[0052] Crush 5 parts of petroleum coke and 3 parts of coal into 100-200 mesh powders and mix them evenly, preheat to 50°C, add 2 parts of binder and stir and mix, and add 0.5 parts of water during the mixing process. The binder is a mixture of petroleum oxidized pitch and coal tar in a ratio of 2:1.

[0053] Then add 1 part of pore-forming agent, stir and mix, knead, and shape to make a disc with a diameter of 10 mm, and then dry it. The pore former is carbon black.

[0054] The molding material enters the carbonization process, the carbonization furnace heats up at a rate of 5°C / min, the carbonization temperature is controlled at 550°C, and the carbonization takes 2 hours. Then enter the activation process, the temperature is raised at a rate of 15°C / min, the activation temperature is controlled at 950°C, and the activation is performed for 9 hours. The activation medium is water vapor.

[0055] The activated product was oxidized with nitric acid with a concentration of 6m...

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Abstract

The invention relates to active carbon used for absorbing and removing sulfides in gasoline, and a preparation method thereof. The active carbon is composed of the following components in percentage by weight: 40-70% of petroleum coke, 10-50% of coal, 10-30% of adhesive, 0.1-10% of pore forming agent and 0.1-10% of amodifier, wherein the ash content of the petroleum coke is less than 1%; the coalis anthracite or bituminous coal with volatile content less than 35%; the adhesive is one of or the mixture of coal pitch, coal tar, vacuum residue, coked condensed oil, ethylene cracked residue, catalytic slurry, petroleum pitch and petroleum pitch oxide; the pore forming agent is one of or the mixture of carbon black containing active functional groups and active elements, furfural residue, ferrocene, furfuryl alcohol and potassium; and the modifier is a hydrate nitrate of Cr, Fe, Co, Ni, Mo, Ti, Cu or Zn. The active carbon has the characteristics of low ash content, high strength, high selectivity, excellent adsorption performance and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and relates to a method for preparing activated carbon from petroleum coke and coal, in particular to a method for preparing activated carbon for adsorbing and removing sulfides in steam and diesel oil. Background technique [0002] Activated carbon is a porous carbonaceous substance with a highly developed pore structure, a large specific surface area, stable physical and chemical properties, and is an excellent adsorbent. Utilizing the characteristics that activated carbon has good adsorption performance for multi-substituted sulfides, activated carbon is used as the matrix, and the organic sulfides in gasoline are adsorbed and removed by modifying and improving the pore structure of activated carbon, increasing the capacity and selectivity of activated carbon. [0003] With the continuous enhancement of people's awareness of environmental protection, the pollution caused by automob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/32C10G25/06
Inventor 高利平姚丽群托罗别克牛豫全瀛寰
Owner PETROCHINA CO LTD
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