Porous carbon and preparation method thereof

A porous carbon and carbonization technology, applied in chemical instruments and methods, other chemical processes, etc., to achieve high yield, easy removal, and excellent adsorption performance

Inactive Publication Date: 2009-06-03
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, porous carbon is generally prepared from raw materials such as coal, wood and fruit shells. With the improvement of people's awareness of ecological environment, there are more and more restrictions on the preparation of raw materials such as natural plants and minerals.

Method used

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  • Porous carbon and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, preparation and performance measurement of porous carbon

[0032] The experiment was repeated 3 times, and the results of performance testing were averaged.

[0033] 1. Preparation of Porous Carbon

[0034] 1. Mix petroleum residue and magnesium acetate at a mass ratio of 1:3, crush it with a pneumatic mill and pass it through a 300-mesh sieve, then raise the temperature to 1000°C in a nitrogen atmosphere (nitrogen pressure is 103kPa), and carbonize for 1 hour to obtain a carbonized product . The heating rate was 5°C / min. The scanning electron microscope photo of the carbonization product is shown in figure 1 (a).

[0035] 2. Wash the charred product with 2mol / L dilute sulfuric acid, then wash it with deionized water until neutral (pH7), and dry it at 100°C to obtain product A. The scanning electron microscope photo of product A is shown in figure 1 (b).

[0036] 2. Performance determination of porous carbon

[0037] The performance of Product A is...

Embodiment 2

[0040] Embodiment 2, preparation and performance measurement of porous carbon

[0041] The experiment was repeated 3 times, and the results of performance testing were averaged.

[0042] 1. Mix petroleum residue and magnesium acetate at a mass ratio of 1:9, crush it with a pneumatic mill and pass it through a 200-mesh sieve, then raise the temperature to 700°C in a nitrogen atmosphere (nitrogen pressure is 100kPa), and carbonize for 2 hours to obtain a carbonized product . The heating rate is 2°C / min.

[0043] 2. The carbonized product was washed with 1 mol / L dilute hydrochloric acid, then washed with deionized water until neutral (pH6), and dried at 100°C to obtain product B.

[0044] 2. Performance determination of porous carbon

[0045] The properties of Product B are shown in Table 2.

[0046] Table 2 Performance of Product B

[0047] Yield (%) Specific surface area (m 2 / g) Total pore volume (cm 2 / g) Mesopore volume (cm 2 / g) Average pore size (...

Embodiment 3

[0048] Embodiment 3, preparation and performance measurement of porous carbon

[0049] The experiment was repeated 3 times, and the results of performance testing were averaged.

[0050] 1. Preparation of Porous Carbon

[0051] 1. Mix the petroleum residue and magnesium acetate at a mass ratio of 1:5, crush it with a pneumatic mill and pass it through a 250-mesh sieve, then raise the temperature to 850°C in an argon atmosphere (argon pressure is 105kPa), and carbonize for 1.5 hours to obtain Carbonization product. The heating rate is 15°C / min.

[0052] 2. The charred product was washed with 2 mol / L dilute sulfuric acid, then washed with deionized water until neutral (pH 8), and dried at 100°C to obtain product C.

[0053] 2. Performance determination of porous carbon

[0054] The performance of Product C is shown in Table 3.

[0055] Table 3 Performance of Product C

[0056] Yield (%) Specific surface area (m 2 / g) Total pore volume (cm 2 / g) Mesopore vo...

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Abstract

The invention discloses a porous carbon and a preparation method thereof. The preparation method of the porous carbon comprises the following steps: 1) 1 part by weight of petroleum residual oil and 3-9 parts by weight or organic magnesium salt are mixed and smashed, and then the temperature is increased to 700-1000 DEG C for carbonization for 1-2 hours, thereby obtaining carbonized products; the pressure of inert gas during the carbonization is 100kPa-105kPa; 2) the acid treatment is carried out on the carbonized products, then the carbonized products are washed until neutral, and the porous carbon is obtained after drying. The porous carbon obtained by the invention has high specific surface area (up to 1183m<2>/g) and good absorption performance; furthermore, the pore size can be regulated and controlled according to the needs of applications. The preparation method has the following advantages: the preparation method does not need to carry out the stabilization and the activation processes, and the operation is simple and easy; magnesium oxide particles generated after the carbonization are easy to remove and can be removed by weak acetic acid, thereby being capable of realizing the recycling of magnesium acetate and reducing the production cost; and the yield of the porous carbon is higher.

Description

technical field [0001] The invention relates to a porous carbon and a preparation method thereof. Background technique [0002] As a commonly used adsorbent, porous carbon is widely used in industrial production and daily life. At present, porous carbon is generally prepared from raw materials such as coal, wood, and fruit shells. With the improvement of people's awareness of ecological environment, the use of natural plants and minerals for preparation is subject to more and more restrictions. [0003] As a by-product of the petroleum industry, petroleum residual oil has a wide range of sources. The annual output of residual oil in the world is about 600-700 million tons, most of which are directly burned as fuel oil. [0004] In the existing petroleum-based porous carbon patents, petroleum coke and petroleum pitch are mostly used as raw materials. For example, in patent CN1030736A, the petroleum coke is pulverized and heated at 500-800° C. for 1-3 hours, then pulverized ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B01J20/20
Inventor 黄正宏张玉贞康飞宇李灿梁吉锋
Owner CHINA NAT OFFSHORE OIL CORP
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