Process for preparing high-specific surface area composite pore structure coal-based activated carbon by using low dosage of KOH

A technology with high specific surface area and composite pores, which is applied in the direction of carbon compounds, inorganic chemistry, non-metallic elements, etc., can solve the problems of production equipment corrosion, production cost increase, and high price of petroleum coke, so as to save costs, improve utilization efficiency, The effect of reducing environmental pollution

Inactive Publication Date: 2012-09-19
XINJIANG UNIVERSITY
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem that this method exists is that the price of petroleum coke is relatively high, and the large-scale use of KOH in the production process makes production cost rise, and can cause serious corros

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
  • Process for preparing high-specific surface area composite pore structure coal-based activated carbon by using low dosage of KOH
  • Process for preparing high-specific surface area composite pore structure coal-based activated carbon by using low dosage of KOH
  • Process for preparing high-specific surface area composite pore structure coal-based activated carbon by using low dosage of KOH

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 2: The coal sample in Liushuanggou, Xinjiang is crushed, sieved to 150-200 mesh, the sieved coal sample and KOH are mixed uniformly by solid phase grinding in the ratio of 1:0.6, and the mixture is mixed under nitrogen (N 2 ) in an atmosphere for carbonization and activation (increase the temperature at a rate of 6 °C / min to 800 °C, keep the temperature for 30 min, then increase the rate of temperature at 5 °C / min to 1100 °C, and keep the temperature for 30 min). After cooling to room temperature, take out the activated product, first Wash with boiling water, then wash with dilute hydrochloric acid, and finally wash with water to remove acid. After drying, the sample can be obtained. The yield of the sample is 37.6%, and the BET specific surface area of ​​the sample is 1579 m 2 / g, Langmuir specific surface area is 1866m 2 / g, the pore volume is 0.773cm 3 / g, the mesopore volume is 0.449cm 3 / g, the pore structure is micropore-mesoporous composite pore str...

Embodiment 2

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
Specific surface areaaaaaaaaaaa
Pore volumeaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a process for preparing high-specific surface area composite pore structure coal-based activated carbon by using coal. The process comprises steps of firstly, crushing the coal into 100 meshes per square inch to 200 meshes per square inch, then mixing coal powder and an alkali activator uniformly by grinding in inert atmosphere, performing multi-stage temperature controlling activation, washing and drying to obtain the high-ratio surface area activated carbon with a micro pore-meso pore composite pore structure. The prepared high-ratio surface area activated carbon is low in non carbon impurity content, high in specific surface area and good in adsorption performance and has the micro pore-meso pore composite pore structure. Compared with the prior art, consumption of the alkali activator is reduced greatly, therefore, the product has high cost performance.

Description

technical field [0001] The invention belongs to a method for preparing activated carbon with high-efficiency adsorbent, in particular to a method for preparing activated carbon with high specific surface area composite pore structure from coal. Background technique [0002] Activated carbon is a carbon material with a rich pore structure, which has the advantages of large specific surface area, abundant raw materials, and low price. In the development and application of activated carbon, a variety of activators have been used in the production of activated carbon, and the activators used in large-scale industrial production are mainly ZnCl 2 、H 3 PO 4 , water vapor, CO 2 , air, etc. [0003] At present, the commonly used raw materials for the production of activated carbon are wood, fruit shells, petroleum coke and coal. Because coal is relatively cheap and easy to obtain, coal-based activated carbon accounts for the majority of activated carbon production in activated ...

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
IPC IPC(8): C01B31/12C01B32/33C01B32/348
Inventor 贾殿赠韩军王鲁香
Owner XINJIANG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap