Preparation method of graphitized activated carbon carrier

A technology of activated carbon and graphitization, which is applied in the direction of catalyst carrier, chemical instrument and method, chemical/physical process, etc., can solve the problems of high processing temperature, long hole expansion time, unfavorable mass production, etc., and achieve the reduction of carbon gasification temperature , shorten the gasification time, shorten the effect of activation time

Inactive Publication Date: 2019-02-01
FUZHOU UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the current patent reports, the method of patent CN102442665A pre-adding pore-enlarging agent is graphitized activated carbon. The pore-enlarging agent is alkali, hydrochloride or phosphoric acid. Impurity ions are easy to remain in the medium; patent CN 104071786 A discloses a preparation method of adding a pore-enlarging agent to activated carbon and treating it under an inert atmosphere at 500 ℃ to 1000 ℃ to obtain a high specific surface area, but due to its high processing temperature and high atmosphere requirements , which is not conducive to industrial mass production. At the same time, the dilute acid used is used to wash the residual metal salt or its oxide after the hole is expanded. The preparation route is long and the energy consumption is high.
Patent CN 1382527 A discloses a method of expanding the pores of high-temperature graphitized activated carbon to restore high specific surface and pore volume. Compared with surface activated carbon, graphitized activated carbon does not add a pore expander before expanding the pores, and does not perform other activation treatments. To achieve a suitable pore structure, it takes a long time for pore expansion and high energy consumption.

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 graphitized activated carbon carrier
  • Preparation method of graphitized activated carbon carrier
  • Preparation method of graphitized activated carbon carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method for graphitized activated carbon carrier, comprising the following steps:

[0023] (1) Take the degree of graphitization as 0.9~1.1 (I G / I D ) Industrial graphitized activated carbon is pre-oxidized with nitric acid at a temperature of 30°C for 15 hours, then dried to obtain the primary product; the concentration of nitric acid is 5% (based on the mass of the carbon carrier);

[0024] (2) Place the initial product in (1) in an air atmosphere furnace, heat up through a program at a heating rate of 5°C / min, and expand the holes at an end point temperature of 450°C for 15 hours;

[0025] (3) Naturally cool the product after pore expansion in step (2) to room temperature, take it out, and it will be high specific surface graphitized activated carbon.

Embodiment 2

[0027] (1) Take the degree of graphitization as 1~2 (I G / I D ) Industrial graphitized activated carbon is pre-oxidized with nitric acid at a temperature of 80°C for 1 hour, then dried to obtain the primary product; the concentration of nitric acid is 50% (based on the mass of the carbon carrier);

[0028] (2) Place the primary product in (1) in an air atmosphere furnace, heat up through a program at a heating rate of 5°C / min, and expand the holes at the end point temperature of 300°C for 20 hours;

[0029] (3) Naturally cool the product after the pore expansion in step (2) to room temperature, take it out, wash it with deionized water, and dry it to obtain a high specific surface graphitized activated carbon.

Embodiment 3

[0031] With embodiment 1, nitric acid concentration is changed into 25%.

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

No PUM Login to view more

Abstract

The invention discloses a preparation technology of a carrier for preparing a novel ammonia synthesis catalyst in the synthetic ammonia industry, and concretely relates to a preparation method of a graphitized activated carbon carrier. Industrial graphitized activated carbon is pre-oxidized with nitric acid under certain conditions, and then undergoes heat treatment to rapidly obtain the activatedcarbon carrier with a high specific surface. The preparation method, adopting the heat treatment after the pre-oxidation using nitric acid, can greatly reduce the treatment temperature and shorten the treatment time, allows the graphitized activated carbon with the high specific surface to be prepared, and meets high requirements of the industrial activated carbon carrier.

Description

technical field [0001] The invention belongs to the field of preparation of graphitized activated carbon materials, and in particular relates to a preparation method of graphitized activated carbon carrier. technical background [0002] Ruthenium-based ammonia synthesis catalyst as a supported catalyst, the interaction between the carrier and the catalyst has a direct impact on the activity of the catalyst. Some hard requirements of the carrier. [0003] At present, the activated carbon used in industry is carbon that has undergone high-temperature graphitization and subsequent pore expansion treatment, which has good electrical conductivity and stable structure. According to the current patent reports, the method of patent CN102442665A pre-adding pore-enlarging agent is graphitized activated carbon. The pore-enlarging agent is alkali, hydrochloride or phosphoric acid. Impurity ions are easy to remain in the medium; patent CN 104071786 A discloses a preparation method of a...

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 Applications(China)
IPC IPC(8): B01J21/18B01J35/10B01J32/00
CPCB01J21/18B01J35/617B01J35/615B01J35/635B01J35/633B01J35/647
Inventor 倪军尹海云林建新林炳裕江莉龙
Owner FUZHOU UNIV
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