A kind of low-alkali activation preparation method and application of pitch-based activated carbon

An activated carbon and pitch-based technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of short service life of equipment, low conductivity of products, uneven quality, etc., to prolong service life and save alkali consumption , Improve the effect of uniformity

Active Publication Date: 2018-02-23
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is to overcome the defects of large amount of alkali, short service life of equipment, pollution of the environment, low conductivity of the product and uneven quality existing in the activated carbon preparation process in the prior art, and further provide a kind of activated carbon with small amount of alkali However, the preparation method of pitch-based activated carbon with high conductivity, good quality uniformity, energy saving and environmental protection

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
  • A kind of low-alkali activation preparation method and application of pitch-based activated carbon
  • A kind of low-alkali activation preparation method and application of pitch-based activated carbon
  • A kind of low-alkali activation preparation method and application of pitch-based activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The low-alkali activation preparation method of pitch-based activated carbon described in this embodiment includes:

[0044] Coking step: place modified pitch with a sulfur content of less than 1wt% and a carbon content greater than 90wt% (its quality standard conforms to the provisions of YB / T 5194-2003) in a coking furnace, under nitrogen protection, at a rate of 1.5°C / min Speed ​​up to 480°C, coking for 9 hours to obtain green coke;

[0045] Mixing step: pulverizing the raw coke, screening the raw coke powder with a particle size of 350-400 mesh; mixing the green coke powder and solid potassium hydroxide evenly according to the mass ratio of 1:1.7, and grinding to form a mixed powder;

[0046] Pre-activation step: put the mixed powder in the activation furnace, stir continuously at a speed of 30rpm, and under the protection of nitrogen, raise the temperature to 250°C at a speed of 5°C / min, keep it warm for 30min, and then raise the temperature to 350°C, keep warm fo...

Embodiment 2

[0051] The low-alkali activation preparation method of pitch-based activated carbon described in this embodiment includes:

[0052] Coking step: putting coal tar pitch with a sulfur content of less than 1wt% and a carbon content of more than 90wt% in a coking furnace, under nitrogen protection, heating up to 450°C at a rate of 10°C / min, and coking for 10 hours to obtain green coke;

[0053] Mixing step: crushing the raw coke, screening the raw coke powder with a particle size of 300-500 mesh; mixing the raw coke powder and solid potassium hydroxide evenly according to the mass ratio of 1:2, and grinding to form a mixed powder;

[0054] Pre-activation step: put the mixed powder in the activation furnace, stir continuously at a speed of 50rpm, and under the protection of nitrogen, raise the temperature to 300°C at a speed of 0.5°C / min, keep it warm for 30min, and then raise the temperature to 400°C, keep warm for 100min, then cool naturally to get the preactivated product;

[0...

Embodiment 3

[0059] The low-alkali activation preparation method of pitch-based activated carbon described in this embodiment includes:

[0060] Coking step: put petroleum pitch with a sulfur content of less than 1wt% and a carbon content of more than 90wt% in a coking furnace, raise the temperature to 460°C at a rate of 0.5°C / min under the protection of argon, and perform coking treatment for 15 hours to obtain raw coke;

[0061] Mixing step: pulverize the raw coke, screen out the raw coke powder with a particle size of 450-500 mesh; mix the raw coke powder and solid sodium hydroxide evenly according to the mass ratio of 1:1, and grind to form a mixed powder;

[0062] Pre-activation step: put the mixed powder in the activation furnace, stir continuously at a speed of 100rpm, and under the protection of argon, raise the temperature to 350°C at a speed of 10°C / min, keep it warm for 80min, and then heat it at 5°C / min The temperature was raised to 500°C at a high speed, kept at a temperature ...

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
particle sizeaaaaaaaaaa
electrical resistivityaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a low-alkali activation preparation method and application of asphalt-based activated carbon. The method uses asphalt as a raw material, and sequentially undergoes coking, mixing with solid alkali, preactivation, activation and cleaning to prepare the asphalt-based activated carbon. The preparation method of the present invention uniformly mixes raw coke and alkali through pre-activation treatment, on the one hand increases the contact between raw coke and alkali, makes the present invention save at least 3 / 8 of the alkali consumption compared with the prior art, thereby extending The service life of the activation furnace reduces the discharge of cleaning waste liquid and the difficulty of treatment, so that the present invention has the advantages of energy saving and environmental protection; on the other hand, it can also improve the quality uniformity of activated carbon and avoid performance differences between different batches of products. Moreover, the preparation method of the present invention heats up the pre-activated product quickly for activation treatment, which reduces the corrosion of equipment caused by strong alkali at high temperature for a long time, and can make the surface functional groups of the prepared activated carbon moderate, which is conducive to improving the electrical conductivity of the product. Rate.

Description

technical field [0001] The invention relates to the field of preparation of activated carbon, in particular to a low-alkali activation preparation method and application of pitch-based activated carbon with high electrical conductivity. Background technique [0002] Supercapacitor is a new type of energy storage device between electrolytic capacitors and batteries. It not only has the characteristics of high specific power and high cycle performance of capacitors, but also has the characteristics of energy storage of batteries. The use requirements of high specific energy make supercapacitors have a very wide range of applications and a huge potential market, and have become a research hotspot in the field of new energy. [0003] The energy storage principle of a supercapacitor is based on the electric double layer formed under the charging of the electrode. Therefore, the performance of the electrode is a key factor restricting the application of the supercapacitor, which r...

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): C01B32/348H01G11/34
CPCY02E60/13
Inventor 崔永君洪东升刘冬冬李超毅于春林
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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