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Semicoke-based activated coke and preparation method thereof

A technology based on activated carbon and semi-coke, which is applied in the field of comprehensive utilization of resources, can solve the problems of high production cost, carbonization, long activation time, and large energy consumption of activated coke, and achieve the effects of shortening activation time, low cost, and broad application prospects

Pending Publication Date: 2019-01-11
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because raw coal is used as the base material, the carbonization and activation time is long, the energy consumption is large, and the high-temperature coal tar as the binder is expensive, resulting in high production cost of activated coke.

Method used

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  • Semicoke-based activated coke and preparation method thereof
  • Semicoke-based activated coke and preparation method thereof
  • Semicoke-based activated coke and preparation method thereof

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Effect test

preparation example Construction

[0032] refer to figure 1 , the preparation method of blue carbon-based activated coke of the present invention comprises the following steps:

[0033] (1) Prepare raw materials: mix hydrofluoric acid and coal direct liquefaction residue at a mass ratio of 1: (4-10) for ash removal pretreatment; coal direct liquefaction residue is pretreated and crushed to 80-120 mesh and Put it in an oven for drying; crush the semi-coke powder to 80-120 mesh and put it in the oven for drying; the drying temperature of the coal direct liquefaction residue and the semi-coke powder is 105°C-120°C, and the drying time 4h-6h;

[0034] (2) Mix the semi-coke powder and the pretreated coal direct liquefaction residue according to the mass ratio (3:2)-(4:1) at room temperature, and add a starch solution with a solute mass fraction of 3%-6% And stir evenly, the added starch solution is used to knead semi-coke powder and coal direct liquefaction residue to form mixture A;

[0035] (3) Weigh 0.6-1.0 g ...

Embodiment 1

[0042]Weigh 100g of coal direct liquefaction residue, mix hydrofluoric acid and coal direct liquefaction residue at a mass ratio of 1:4 for deashing treatment, then dry at 105°C for 4 hours, and pulverize semi-coke powder and coal direct liquefaction residue to 80-120 mesh, blue coke powder and coal direct liquefaction residue after deashing are mixed at room temperature at a mass ratio of 4:1, and starch solution with a solute mass fraction of 3%-6% is added and stirred evenly, and the mixture is batched Under the pressure of 5MPa, it is pressed into a cylindrical material strip, and dried in an oven at 100°C for 4 hours. Take 15-20 dried shaped strips and put them into a carbonization activation furnace. The heating rate was raised to 500°C, the temperature was kept constant for 45 minutes, and then the temperature was continued to rise to 750°C under the protection of an inert gas. The flow rate of the activator was 80mL / min, and the activation time was 60 minutes. The compr...

Embodiment 2

[0044] Weigh 100g of coal direct liquefaction residue, mix hydrofluoric acid and coal direct liquefaction residue at a mass ratio of 1:5 for deashing treatment, then dry at 110°C for 5 hours, and pulverize semi-coke powder and coal direct liquefaction residue to 80 -120 mesh, semi-coke powder and coal direct liquefaction residue after deashing are mixed at room temperature in a mass ratio of 7:3, and starch solution with a solute mass fraction of 3%-6% is added and stirred evenly. Press it into a cylindrical strip under a pressure of 6MPa, and dry it in an oven at 110°C for 5 hours. Take 15-20 dried strips and put them into a carbonization activation furnace. Raise the temperature to 550°C, keep the temperature constant for 30min, then continue to heat up to 850°C under the protection of inert gas, the flow rate of the activator is 60mL / min, and the activation time is 90min. The compressive strength of the obtained active coke is 408.6N, and the iodine adsorption value is 343mg...

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Abstract

The invention belongs to the technical field of resource comprehensive utilization, and relates to a semicoke-based activated coke and a preparation method thereof. According to the invention, directcoal liquefaction residue is subjected to ash removal pretreatment, and the direct coal liquefaction residue is pretreated, pulverized to 80-120 meshes, and dried; the semicoke powder is pulverized to80-120 meshes and dried; the semicoke powder and the direct coal liquefaction residue are mixed according to a mass ratio of (3:2)-(4:1), and a starch solution for molding is added and stirred uniformly to form a mixture A; the mixture A is subjected to compression moulding under a pressure of 5-7 MPa to obtain a moulded material strip; the moulded material strip is dried; and the dried moulded material strip is carbonized and activated under the protective atmosphere; and the activated moulded material strip is cooled to room temperature under the protective atmosphere to obtain the semicoke-based activated coke. The method takes the semicoke powder as the main raw material, adds the direct coal liquefaction residue, and prepares the high-adsorption performance and high-strength activated coke by grinding, kneading, molding, charing and activation; and the method is simple in process and low in cost, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of resources, and relates to a blue carbon-based activated coke and a preparation method thereof. Background technique [0002] The traditional preparation method of activated coke uses raw coal as the matrix, high-temperature coal tar as the binder, and the mixture is formed through a series of processes such as extrusion molding, carbonization, activation and modification. Because raw coal is used as the base material, the carbonization and activation time is long, the energy consumption is large, and the high-temperature coal tar as the binder is expensive, resulting in high production cost of activated coke. [0003] The Jurassic coal resource reserves in the border areas of Shanxi, Shaanxi and Mongolia in my country are large, and the coal quality is very good, low in ash, low in sulfur, low in phosphorus, high in calorific value, high in fixed carbon, high in specific resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/336C01B32/33
CPCC01B32/33C01B32/336
Inventor 田宇红景献德宋永辉薛娟琴兰新哲周军
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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