Method for preparing high-specific surface area active carbon by petroleum coke

A high specific surface area, petroleum coke technology, applied in the field of chemical production, can solve the problems of wide pore size distribution of activated carbon, large carbon consumption, high production cost, etc., and achieve the effect of reducing production cost, reducing pollution and improving utilization rate

Inactive Publication Date: 2006-10-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The above-mentioned patent method has the following disadvantages in the production process: (1) the activation yield is low, the carbon consumption is large, and the production cost is high; (2) the alkali coke used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 (comparative example):

[0022] After 2g of petroleum coke raw material and 6g of potassium hydroxide are ground and mixed evenly, put into the reactor, carry out carbonization and activation treatment in argon atmosphere (carrier gas flow rate is 200cm 3 / min, the heating rate is 8°C / min, the final temperature is 730°C, and the activation time is 1 hour), after cooling to room temperature, the activated product is taken out, the excess alkaline medium and product are washed away with water, and 1.23g can be obtained after drying Activated carbon with a specific surface area of ​​1763m 2 / g, the average pore diameter is 1.29nm, and the activation yield is 61.5%.

Embodiment 2

[0024] Mix 10g of petroleum coke raw material with 30cm 3 20% hydrogen peroxide was continuously stirred and mixed at 50°C for 2 hours, then heated to 65°C, vacuumed, evaporated to dryness, taken out and put into an oven to dry at 100°C for 3 hours. Take 2g of petroleum coke and 6g of potassium hydroxide that have been pre-oxidized and mix it evenly, then put it into the reactor, and carry out carbonization and activation treatment in an argon atmosphere (the carrier gas flow rate is 200cm 3 / min, the heating rate is 8°C / min, the final temperature is 730°C, and the activation time is 1 hour), after cooling to room temperature, the activated product is taken out, the excess alkaline medium and product are washed away with water, and 0.81g can be obtained after drying Activated carbon with a specific surface area of ​​2744m 2 / g, the average pore diameter is 1.20nm, and the activation yield is 40.5%.

Embodiment 3

[0026] Mix 10g of petroleum coke raw material with 30cm 3 25% hydrogen peroxide was continuously stirred and mixed at 50°C for 2 hours, then heated to 65°C, vacuumed, evaporated to dryness, taken out and put into an oven to dry at 100°C for 3 hours. Take 2g of petroleum coke and 6g of potassium hydroxide that have been pre-oxidized and mix it evenly, then put it into the reactor, and carry out carbonization and activation treatment in an argon atmosphere (the carrier gas flow rate is 200cm 3 / min, the heating rate is 8°C / min, the final temperature is 730°C, and the activation time is 1 hour), after cooling to room temperature, the activated product is taken out, the excess alkaline medium and product are washed away with water, and 0.87g can be obtained after drying Activated carbon with a specific surface area of ​​2530m 2 / g, the average pore diameter is 1.22nm, and the activation yield is 43.5%.

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Abstract

The invention relates to a methjod for preparing activated charcoal with high specific surface area by using petroleum tar. It comprises following steps: disintegrating petroleum tar into grits # 80; immersing raw material into oxide medium for complete contact, oxidizing; mixing with alkali, activating in inert atmosphere, washing and getting said product. The specific surface area of got product is over 2000 m2/g, the micropore volume is 1.2-2.1 cm3/g, bore diameter is about 1 nm, the adsorbility is good, the alkali consumption is greatly reduced compared with current technology, the activating temperature is low and ratio of performance and cost is high.

Description

technical field [0001] The invention relates to a method for preparing activated carbon with high specific surface area using petroleum coke as a raw material, belonging to the technical field of chemical production. Background technique [0002] Activated carbon is an adsorbent with excellent performance, which is widely used in various industries because of its dual characteristics of physical adsorption and chemical adsorption. my country is the largest producer of activated carbon in the world. The output of activated carbon accounts for one-third of the world's output. However, the activated carbon it produces is mainly medium and low-grade products, and the overall product added value is not high. The expansion of the application field of activated carbon puts forward new and higher requirements for the adsorption performance. Under the general requirements of "high adsorption, multi-function and high strength", there is a trend of increasing demand for special activat...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 徐绍平卢春兰刘书林干一雄刘淑琴刘长厚
Owner DALIAN UNIV OF TECH
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