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Process for preparing active coke

A technology of active coke and semi-coke, which is applied in the field of active coke preparation, can solve the problems of complex preparation steps and high cost, and achieve the effect of simplifying the production process and reducing the production cost.

Inactive Publication Date: 2003-04-30
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of complicated preparation steps and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] First, the semi-coke with a carbon content of 70wt% and a sulfur content of 1wt% is broken into irregular shapes of 2-8mm, and then sieved to remove the powder. Weigh 200 grams and put it into the reaction furnace. After feeding nitrogen for 10 minutes, start to heat up to 550°C at a rate of 8°C / min and keep the temperature for 50 minutes. Continue to heat up to 900°C at a rate of 5°C / min. The steam rate is 1.5 g / min, and the activation time is 1.0 hour.

Embodiment 2

[0015] First, semi-coke or lump coal with a carbon content of 72wt% and a sulfur content of 0.9wt% is broken into irregular shapes of 2-8mm, and then sieved to remove the powder. Weigh 200 grams and put it into the reaction furnace. After feeding nitrogen for 15 minutes, start to heat up to 550°C at a rate of 6°C / min and keep the temperature constant for 40 minutes. Continue to heat up to 950°C at a rate of 6°C / min and then feed water vapor. The steam rate is 5 g / min, and the activation time is 0.5 hour.

Embodiment 3

[0017] First, semi-coke or lump coal with a carbon content of 75wt% and a sulfur content of 0.8wt% is broken into irregular shapes of 2-8mm, and then sieved to remove the powder. Weigh 200 grams and put it into the reaction furnace. After passing in argon for 15 minutes, start to heat up to 550°C at a rate of 8°C / min and keep the temperature for 30 minutes, continue to heat up to 850°C at a rate of 5°C / min, and then pass in water vapor , the water vapor rate is 2.7 g / min, and the activation time is 1.2 hours.

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Abstract

A process for preparing active coke includes such steps as breaking the semi-coke to become 2-8 mm blocks, loading in reactor, scavenging with inertial gas for 10-30 min, under protection of inertial gas raising temp to 500-600 deg.c at 6-8 deg.C / min of speed, holding the temp for 30-60 min, raising temp to 850-950 deg.C at 4-6 deg.C / min, and activating for 0.5-1.5 hr by introducing water vapor. Its cost can be lowered by 30%.

Description

[0001] Field: [0002] The invention belongs to a preparation method of active coke. technical background: [0003] my country's energy is dominated by coal, which will produce a large amount of sulfide, nitride and other waste gases during the combustion process, which seriously affects the atmospheric environment. Although the country is continuously strengthening governance efforts, the air quality is still at a relatively heavy pollution level . There are mainly two methods for removing sulfur compounds in various waste gases in industry: wet method and dry method (reference: activated carbon, 1998, NO4, P69), and most of the wet methods use alkaline slurry or solution for absorption Among them, the desulfurization method using limestone or lime as the absorbent is the most widely used desulfurization technology. Its process features high desulfurization efficiency and the utilization rate of the absorbent can exceed 90%. Many, and produce a certain amount of production w...

Claims

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Application Information

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IPC IPC(8): C01B31/08
CPCC01B31/10C02F1/283C01B32/336
Inventor 胡津仙徐源源王俊杰相宏伟颜政民李永旺
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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