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Modified activated carbon material and preparing method thereof

An activated carbon and modified technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as affecting the adsorption capacity of adsorbents, achieve energy saving, no fine equipment requirements, The effect of adsorption enhancement

Inactive Publication Date: 2013-01-16
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the effect of competitive adsorption can seriously affect the adsorption capacity of the adsorbent for perchlorate

Method used

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  • Modified activated carbon material and preparing method thereof
  • Modified activated carbon material and preparing method thereof
  • Modified activated carbon material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of a modified activated carbon material, comprising the steps of:

[0029] (1) Put 1g of raw activated carbon material in the heating furnace, feed nitrogen, control the nitrogen flow rate at 70mL / min, start heating, keep the heating rate at 50°C / min, and raise the temperature to 600°C;

[0030] The raw activated carbon material is obtained by carbonizing carbonaceous material coal at a temperature of 400° C. for 3 hours under inert gas conditions, and then activated with steam at a temperature of 700° C. for 1 hour to obtain the raw activated carbon material. The pore volume is between 0.1 and 0.5mL / g, specific surface area 500-1200m 2 / g;

[0031] (2) After the temperature in step (1) rises to 600°C, stop feeding nitrogen gas and start feeding ammonia gas. The flow rate of ammonia gas is controlled at 70mL / min, and the temperature is kept at 600°C. The reaction time is 10min;

[0032] (3) After the reaction in step (2), turn off the ammonia g...

Embodiment 2

[0034] A preparation method of a modified activated carbon material, comprising the steps of:

[0035] (1) Put 1g of raw activated carbon material in the heating furnace, feed nitrogen, control the nitrogen flow rate at 70mL / min, start heating, keep the heating rate at 50°C / min, and raise the temperature to 600°C;

[0036] Described raw material activated carbon material is with embodiment 1;

[0037] (2) After the temperature in step (1) rises to 600°C, stop feeding nitrogen gas and start feeding ammonia gas. The flow rate of ammonia gas is controlled at 70mL / min, and the temperature is kept at 600°C. The reaction time is 30min;

[0038] (3) After the reaction in step (2), turn off the ammonia gas, turn on the nitrogen gas, and the heating furnace starts to cool down at a rate of 10°C / min. When the temperature drops to room temperature, take out the treated raw activated carbon material and use it to After washing with ion water and drying, a modified activated carbon mat...

Embodiment 3

[0040] A preparation method of a modified activated carbon material, comprising the steps of:

[0041] (1) Put 1g of raw activated carbon material in the heating furnace, feed nitrogen, control the nitrogen flow rate at 70mL / min, start heating, keep the heating rate at 50°C / min, and raise the temperature to 600°C;

[0042] Described raw material activated carbon material is with embodiment 1;

[0043] (2) After the temperature in step (1) rises to 600°C, stop feeding nitrogen gas and start feeding ammonia gas. The flow rate of ammonia gas is controlled at 70mL / min, and the temperature is kept at 600°C. The reaction time is 60min;

[0044](3) After the reaction in step (2), turn off the ammonia gas, turn on the nitrogen gas, and the heating furnace starts to cool down at a rate of 10°C / min. When the temperature drops to room temperature, take out the treated raw activated carbon material and use it to After washing with ion water and drying, a modified activated carbon mate...

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Abstract

The invention discloses a modified activated carbon material and a preparing method thereof. The preparing method of the modified activated carbon material is that activated carbon serving as the raw material is added into a heating furnace, nitrogen is filled into the heating furnace, then ammonia is filled into the heating furnace after the temperature rises to be 600-900 DEG C, the activated carbon reacts in the ammonia for 10-120 min, and finally the modified activated carbon material is obtained. The modified activated carbon material has high adsorptive property for perchlorate ions in water, is improved by near 9 times in the adsorptive property for perchlorate in water compared with the raw material activated carbon, and has the advantages of being high in mechanical strength, long in use life cycle and low in use cost. The preparing process of the modified activated carbon material is simple to operate, the prepared modified activated carbon material can be regenerated and used repeatedly, and material loss is small.

Description

technical field [0001] The invention relates to a modified activated carbon material and a preparation method thereof. Background technique [0002] For perchlorate ions in water (ClO 4 - ) research has received more and more attention in recent years, which is mainly related to the progress of perchlorate detection technology. Before 1997, the lowest concentration detectable by liquid phase extraction and spectrophotometry was about 100 μg / L. Since 1998, companies such as Dionex in the United States have researched and developed a high-efficiency chromatographic analysis and detection method for perchlorate, with a detection limit of ng / L. Due to the improvement of detection methods, many sources of drinking water that were considered safe have been detected to be polluted by perchlorate. The impact of perchlorate on human health is mainly due to its impact on human thyroid function. [0003] At present, the concentration of perchlorate ion detected in groundwater or s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/12
Inventor 陈维芳张泽亚程明涛李倩林淑英王宏岩于哲
Owner UNIV OF SHANGHAI FOR SCI & TECH
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