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Method for preparing activated carbon by utilizing direct coal liquefaction residue

A technology for direct liquefaction of coal and preparation of activated carbon, which is applied in the removal of solid waste and other directions, can solve the problems of activated carbon without high specific surface area, and achieve the effects of easy operation, developed micropores, and simplified process.

Inactive Publication Date: 2011-08-17
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main literatures on the utilization of coal direct liquefaction residues include Fuel {2010.89(5): 1169-1171}, Chinese Journal of Chemical Industry {2009.60(9): 2359-2364}, Fuel {2008.87(15-16): 3474-3476} 、新型炭材料{2008.23(1):63-68}、煤炭转化{2007.30(3):41-44}以及中国专利申请200910086158.4、200510047800.X、200610134271.1、201010198795.3、201010225042.7、201010216320.2、200910087907.5、200910308685.5等, However, none of the relevant residue utilization methods described in the above references involves the technology of using coal direct liquefaction residue to prepare activated carbon with high specific surface area.

Method used

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  • Method for preparing activated carbon by utilizing direct coal liquefaction residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Grind coal direct liquefaction residue C1 into 180-250μm powder, weigh 5g KNO 3 125g KOH was dissolved in 125mL water, then 50g residue powder and 40mL absolute ethanol were added to the mixed solution. Stir at room temperature for 12 hours, after mixing evenly, dry the mixture at 100°C for 14 hours; after drying, place the material in a carbonization furnace, raise the temperature to 200°C at a rate of 10°C / min in an air atmosphere and keep the temperature constant 180min, then carry out low-temperature treatment (constant temperature 60min at a temperature of 600 ℃) and high-temperature treatment (constant temperature 90min at a temperature of 800 ℃) with a heating rate of 10 ℃ / min under a nitrogen atmosphere, and the crude activated carbon product is obtained after the natural cooling of the material; Add 1250 mL of hydrochloric acid with a mass concentration of 10% to the crude activated carbon product, stir for 10 minutes, then heat to boil for 20 minutes and then ...

Embodiment 2

[0046] Grind coal direct liquefaction residue C1 into 180-250μm powder, weigh 5g KNO 3 125g KOH was dissolved in 125mL water, then 50g residue powder and 45mL absolute ethanol were added to the mixed solution. Stir at room temperature for 1 hour, after mixing evenly, dry the mixture at 120°C for 14 hours; after drying, place the material in a carbonization furnace, and raise the temperature to 300°C at a rate of 5°C / min in an air atmosphere and keep the temperature constant 60min, then carry out low-temperature treatment (constant temperature 60min at a temperature of 600 ℃) and high-temperature treatment (constant temperature 90min at a temperature of 800 ℃) with a heating rate of 5 ℃ / min under an argon atmosphere, and obtain a crude activated carbon product after the natural cooling of the material; Add 1500mL of hydrochloric acid with a mass concentration of 3% to the crude activated carbon product, stir for 10min, then heat to boil for 30min and then filter. Wash until th...

Embodiment 3

[0050] Grind coal direct liquefaction residue C2 into 180-250μm powder, weigh 5gKNO 3 100g KOH was dissolved in 100mL water, and then 50g residue powder and 50mL absolute ethanol were added to the mixed solution. Stir at room temperature for 6 hours, after mixing evenly, dry the mixture at 120°C for 12 hours; after drying, place the material in a carbonization furnace, and raise the temperature to 250°C at a rate of 10°C / min in an air atmosphere and keep the temperature constant 90min, then carry out low-temperature treatment (constant temperature 60min at a temperature of 600 ℃) and high-temperature treatment (constant temperature 90min at a temperature of 800 ℃) with a heating rate of 5 ℃ / min under a helium atmosphere, and obtain a crude activated carbon product after the natural cooling of the material; Add 1000mL of hydrochloric acid with a mass concentration of 5% to the crude activated carbon product, stir for 10min, then heat to boil for 20min and then filter. Wash unt...

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Abstract

The invention provides a method for preparing activated carbon by utilizing direct coal liquefaction residue as a raw material. The method includes the steps as follows: (1) adding smashed direct coal liquefaction residue together with KNO3, KOH and absolute alcohol into water, stirring to be uniform under room temperature, and later drying the obtained mixture to obtain a dry material; (2) placing the prepared dry material in a carbonization furnace, conducting preoxidation in the atmosphere of air, conducting carbonization-activation in the atmosphere of inertia gas, and then obtaining coarse activated carbon; and (3) acid-washing and deashing the prepared coarse activated carbon to obtain finished activated carbon. The method is simple in preparation process route, uses conventional equipment and has universality to the raw material. The obtained activated carbon has not only characteristics of high specific surface area, developed micropores and low ash content, but also controllable output, higher productivity, suitability for production in batches, and better technological and economic benefits.

Description

technical field [0001] The invention relates to a method for preparing activated carbon, in particular to a method for preparing a high specific surface area activated carbon product by using coal direct liquefaction residue as a raw material. Background technique [0002] The characteristic of China's energy resources is that coal resources are abundant, while oil and natural gas are relatively poor, which determines that my country's energy structure must be dominated by coal, and this energy structure will not undergo fundamental changes for a long time in the future. Variety. Since the 1990s, my country has been relying on imported oil to make up for the shortage of domestic oil production. With the further development of China's economy, the contradiction between oil supply and demand will become increasingly prominent. Today, when the world is facing a severe oil energy crisis, in order to ensure national energy and economic security, using coal as a substitute for oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12B09B3/00
Inventor 吴秀章周颖李克健邱介山张胜振舒成李丽张艳
Owner CHNA ENERGY INVESTMENT CORP LTD
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