CN1057065C - Preparation of superhigh specific surface area active carbon - Google Patents
Preparation of superhigh specific surface area active carbon Download PDFInfo
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- CN1057065C CN1057065C CN98114553A CN98114553A CN1057065C CN 1057065 C CN1057065 C CN 1057065C CN 98114553 A CN98114553 A CN 98114553A CN 98114553 A CN98114553 A CN 98114553A CN 1057065 C CN1057065 C CN 1057065C
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- surface area
- specific surface
- rice husk
- active carbon
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Abstract
The present invention relates to a preparation method of active carbon with the oversize specific surface area. In the method, rice hulls are used as raw materials. The prepared activated carbon has the advantages of large specific surface area, good cellular structure, narrow pore size distribution and strong absorbability, and is good electrode materials, adsorption materials, catalysts and catalyst carriers. The present invention has the advantages of rich and cheap raw materials, simple preparation process, safety, high efficiency, etc.
Description
The present invention is a kind of preparation method of activated carbon with high specific surface area.
Gac is as a kind of carbon materials, and purposes is wide, demand is big, and the gac industrial development is very fast.Traditional gac is raw material generally with coal, timber, prepares through gas activation or chemical activation.Gas activation mainly is with carbonic acid gas or steam activation; Chemical activation is with ZnCl
2, H
3PO
4Deng being main, but specific surface area has only 1000m
2About/g, and pore distribution is wide, is made up of micropore, mesopore, macropore three parts, can't reach that pore distribution is narrow, specific surface area is big, the requirement of high adsorption capacity.Therefore, in recent years, the development of active carbon with high specific surface area just became the focus that the various countries scientific worker studies with exploitation.Active carbon with high specific surface area can improve electrical capacity as capacitance electrode material, utilize its high absorption property can improve the active adsorption amount of material, add the characteristics that pore distribution is narrow, can improve gas delivery ability and sewage purification ability, as catalyzer or support of the catalyst, can improve selectivity and productive rate.The research in this field, the U.S., Japan maintain the leading position, the U.S. has just proposed the general method for making of active carbon with high specific surface area in 1978, Japan has also reported the achievement in research of this respect in succession, and these achievements have played very big promoter action to Application of Brand Active Carbon and research.
There has been significant progress in China, but apart from developed country very big gap has been arranged in the development and exploitation of active carbon with high specific surface area.It is that raw material activates and prepares that external achievement in research is to use the high materials of carbon content such as coal tar, refinery coke, and with the report of other raw material (as plant base) seldom.The present invention utilizes cheap rice husk as raw material, produces activated carbon with high specific surface area.China's rice husk aboundresources, but it utilizes degree very low, there were some to produce the report of silicon-dioxide, silicon tetrachloride and silicon nitride by rice husk in the early 1990s, be to utilize the high characteristics of silicone content in the rice husk, the report for preparing common gac with rice husk was also arranged, China nineteen ninety-five patent CN1 has illustrated in 110,957 and has used rice husk to get process of active carbon as raw material by the gas activation legal system.How to utilize rice husk to prepare active carbon with high specific surface area and just become content of the present invention.
The gac that the present invention makes has that specific surface area is big, microvoid structure is flourishing, pore size distribution is narrow, the characteristics of high adsorption capacity, be extraordinary electrode materials, sorbing material, catalyzer and support of the catalyst, and characteristics such as it is inexpensive abundant to have a raw material, and technology is simple, safe, efficient.
The present invention carries out carbonization with rice husk, and carbonization temperature is 400 ℃～600 ℃, and carbonization time 3～5 hours can obtain the rice husk carbide and promptly activate required raw material.The used activator of the present invention is an alkaline matter, for example: KOH, NaOH, K
2CO
3, Na
2CO
3Deng, wherein be best with KOH.Is rice husk carbide and activator 1: 2～5 to mix by weight, elder generation's pre-treatment, treatment temp is 300 ℃～500 ℃, treatment time is 20～60 minutes, is warmed up to 700 ℃～850 ℃ and activates, and activates 30～120 minutes postcooling, grind, be soaked in water and be washed to neutrality, drying obtains specific surface area 2500m
2/ g～3500m
2The product of/g.
Embodiment 1
Rice husk carbide 1 part (weight) is mixed with 3 parts of KOH, and processing is after 30 minutes down at 400 ℃, and intensification activates 1 hour down at 750 ℃, cooling, and grinding, soaking and water washing is extremely neutral, drying, can make specific surface area is 2850m
2The product of/g.
Embodiment 2
Condition just changes 3 parts of KOH into NaOH with embodiment 1, and making specific surface area is 2700m
2The product of/g.
Embodiment 3
Condition adds 4 parts of KOH with embodiment 1, and making specific surface area is 3100m
2The product of/g.
Embodiment 4
Condition is with embodiment 3, and activation temperature activates 1 hour down at 800 ℃, and making specific surface area is 3300m
2The product of/g.
Claims (1)
- The preparation method of 1 one kinds of active carbon with superhigh specific surface area is characterized in that at first rice husk being carried out carbonization, and carbonization temperature is 400～600 ℃, and carbonization time is 3～5 hours acquisition rice husk carbide, adopts KOH or NaOH, Na then 2CO 3, K 2CO 3For activator carries out activation treatment to the rice husk carbide, rice husk carbide and activator are 1: 2～5 to mix by weight, elder generation's pre-treatment, treatment temp is 300～500 ℃, treatment time is 20～60 minutes, be warmed up to 700～850 ℃ again and activate, activate after 30～120 minutes, cool off, grind, be soaked in water and be washed to neutrality, it is dry that just can to obtain specific surface area be 2500m 2/ g～3500m 2The product of/g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98114553A CN1057065C (en) | 1998-06-12 | 1998-06-12 | Preparation of superhigh specific surface area active carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98114553A CN1057065C (en) | 1998-06-12 | 1998-06-12 | Preparation of superhigh specific surface area active carbon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1203887A CN1203887A (en) | 1999-01-06 |
| CN1057065C true CN1057065C (en) | 2000-10-04 |
Family
ID=5224195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98114553A Expired - Fee Related CN1057065C (en) | 1998-06-12 | 1998-06-12 | Preparation of superhigh specific surface area active carbon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1057065C (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100503435C (en) * | 2003-05-16 | 2009-06-24 | 中国人民解放军军事医学科学院毒物药物研究所 | Nano level active carbon and its preparation and use |
| CN100354201C (en) * | 2005-12-02 | 2007-12-12 | 张海军 | Natural gas adsorpting super active carbon and its producing process and activation furnace |
| JP4618308B2 (en) * | 2007-04-04 | 2011-01-26 | ソニー株式会社 | Porous carbon material and method for producing the same, adsorbent, mask, adsorbing sheet, and carrier |
| CN101670278B (en) * | 2009-09-22 | 2012-01-18 | 江汉大学 | Method for preparing desulfurization absorbent by using rice husk ash |
| CN101804988B (en) * | 2010-05-05 | 2011-12-14 | 吉林大学 | Novel method for preparing silicon dioxide and active carbon from rice hull ash |
| CN101891189B (en) * | 2010-08-13 | 2011-11-23 | 宁乡县亮之星米业有限公司 | Method for preparing coal gas, top-grade active carbon, water glass and silicate phosphate from rice hulls |
| CN102247802A (en) * | 2011-04-27 | 2011-11-23 | 中南大学 | Method for preparing activated carbon |
| CN102897746B (en) * | 2012-09-25 | 2015-04-29 | 珠海市吉林大学无机合成与制备化学重点实验室 | Porous carbon material and method for preparing same |
| CN102862983A (en) * | 2012-09-26 | 2013-01-09 | 中国科学院山西煤炭化学研究所 | Preparation method of spherical active carbon for capturing CO2 |
| CN103408009A (en) * | 2013-04-27 | 2013-11-27 | 吉林大学 | Preparation method for coproduction of high-specific-capacitance active carbon and nano silicon dioxide from rice hull |
| CN103224236B (en) * | 2013-05-20 | 2015-06-24 | 山东沂蒙山花生油股份有限公司 | Peanut shell activated carbon for removing toxins in peanut oil and preparation method thereof |
| CN104258889A (en) * | 2014-09-17 | 2015-01-07 | 南京理工大学 | Method utilizing K-based pyrolysis catalyst |
| CN105312040B (en) * | 2015-11-12 | 2018-01-23 | 中山大学 | A kind of preparation method of indoor formaldehyde high-efficiency adsorbent |
| CN105329892B (en) * | 2015-11-24 | 2017-04-12 | 吉林省凯禹生物质开发利用有限公司 | Method for producing capacitive carbon from rice husks |
| CN106430187A (en) * | 2016-09-20 | 2017-02-22 | 湖南南方搏云新材料股份有限公司 | Method of using uncured carbon felt leftover material for preparing supercapacitor electrode activated carbon |
| CN106378137A (en) * | 2016-11-14 | 2017-02-08 | 天津工业大学 | Method for preparing rice husk-based supported metal catalyst mesoporous carbon |
| CN106517183A (en) * | 2016-11-15 | 2017-03-22 | 河南理工大学 | A low-cost simple preparing method for nitrogen-doped porous charcoal with a high specific surface area |
| CN108658567A (en) * | 2018-05-30 | 2018-10-16 | 安徽润晟建设有限公司 | A kind of cracking resistance high-strength insulation brick |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0915711A (en) * | 1995-06-30 | 1997-01-17 | Fuji Photo Optical Co Ltd | Data imprinting device for camera |
-
1998
- 1998-06-12 CN CN98114553A patent/CN1057065C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0915711A (en) * | 1995-06-30 | 1997-01-17 | Fuji Photo Optical Co Ltd | Data imprinting device for camera |
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| CN1203887A (en) | 1999-01-06 |
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