Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of porous structured active carbon

A technology of hierarchical pores and activated carbon, which is applied to the preparation of a hierarchical porous carbon material and activated carbon with a natural template and an activator, to achieve reduced production costs, good rate performance, and reduced dosage Effect

Inactive Publication Date: 2012-05-30
BEIJING UNIV OF CHEM TECH
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technology uses only inorganic minerals in animal bones

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of porous structured active carbon
  • Preparation method of porous structured active carbon
  • Preparation method of porous structured active carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Put 100 g of dried pork bone into a tube electric furnace, blow nitrogen into it, and pre-carbonize at 450° C. for 2 hours. After the pre-carbonized pig bone is pulverized into powder, it is mixed with 100g KOH evenly. Then put it into a tubular electric furnace, feed nitrogen, raise the temperature to 850°C at a rate of 2.5°C / min, and activate for 1h. After cooling, the product was taken out, washed with 2mol / L hydrochloric acid solution, washed with water until neutral, and dried to obtain activated carbon with a hierarchical porous structure. The specific surface area of ​​activated carbon is 2157m 2 / g, the pore volume is 2.26cm 3 / g, the pores are three-dimensionally distributed, the average pore diameter is 4.18nm, and the micropore volume is about 0.64cm 3 / g, mesopore volume is about 1.62cm 3 / g. The pore distribution and SEM results are shown in figure 1 , figure 2 . Depend on figure 1 It can be seen that the pore size is mainly distributed...

Embodiment 2

[0020] Example 2. Put 100 g of dried bovine bone into a horizontal tube electric furnace, feed nitrogen gas and pre-carbonize at 500° C. for 1 hour. After the pre-carbonized bovine bone is pulverized into powder, it is mixed evenly with 200g KOH. Put it into a horizontal tube electric furnace again, blow in nitrogen, raise the temperature to 950°C at a rate of 2.5°C / min, and activate for 0.5h. After cooling, take it out, wash it with 1mol / L hydrochloric acid solution, wash it with water until neutral, and dry it. The specific surface area of ​​the product is 2152m 2 / g, the pore volume is 1.23cm 3 / g, its pores are three-dimensionally distributed, with an average pore diameter of 2.18nm.

Embodiment 3

[0021] Example 3. Put 100 g of dried pork bone into a horizontal tube electric furnace, feed nitrogen gas and pre-carbonize at 450° C. for 3 hours. After the pre-carbonized animal bone is pulverized into powder, it is mixed evenly with 50g KOH. Put it into a horizontal tube electric furnace again, blow in nitrogen, raise the temperature to 650°C at a rate of 2.5°C / min, and activate for 1h. After cooling, take it out, wash it with hydrochloric acid solution, wash it with water until neutral, and dry it. The specific surface area of ​​the product is 703m 2 / g, the pore volume is 0.57cm 3 / g, its pores are three-dimensionally distributed, with an average pore diameter of 3.25nm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of porous structured active carbon. The preparation method comprises the following steps of: drying animal bones serving as raw materials; pre-carbonizing at the temperature of 400 to 500 DEG C under the protection of an inert gas; crushing into powder; adding an activating agent into the powder; performing chemical activation under the protection of the inert gas; cooling and taking a product out; and performing aftertreatment process such as acid-washing, water-washing and drying to obtain the porous structured active carbon, wherein the product prepared at 850 DEG C has the specific surface area of 2,157 square meters per gram and the pore volume of 2.26 cubic centimeters per gram; the pores are in a three-dimensional distribution of micropores, mesopores and macropores. By taking organic substances and inorganic substances in the animal bones as a carbon source and a natural template with a special pore structure, the preparation method overcomes the defects of requirement on a template and difficulty in immersing pores in a template by using a carbon precursor, prepares the porous active carbon, and is low in cost and simple in process.

Description

technical field [0001] The invention relates to a method for preparing activated carbon, in particular to a method for preparing activated carbon with a hierarchical porous structure, in particular to a method for preparing a hierarchical porous carbon material by using a natural template and combining an activator. Background technique [0002] Hierarchical porous carbon materials are porous materials containing micropores (<2nm) and mesopores (2-50nm) or macropores (>50nm). Mesopores or macropores facilitate the diffusion of macromolecules into the material, and sufficient micropores can provide a large number of adsorption sites for small molecules and ions. Therefore, this special structure has the advantages of high-speed separation and high column efficiency under continuous fluid conditions. Hierarchical porous carbon materials are mainly used as catalyst supports, high-efficiency separation materials, gas storage and energy storage materials, biosensors and el...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08C01B31/12
Inventor 黄雅钦黄文涛魏少臣张浩王维坤
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com