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

A kind of carbon foam and preparation method thereof

A foamed carbon and constant temperature technology, which is applied in the preparation/purification of carbon, can solve the problems of poor thermal insulation effect and micro-cracks in carbon foam, and achieve the effects of good thermal insulation, uniform cell size and convenient operation.

Active Publication Date: 2021-08-06
广东煤基碳材料研究有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome defects such as microcracks, poor heat insulation effect, and the need to add additives to improve the compressive strength of foamed carbon in the foamed carbon prepared in the prior art, thereby providing a foamed carbon and its preparation method

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 carbon foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a method for preparing foamed carbon, specifically comprising:

[0030] 35wt% lignite powder, 64.95wt% 1-methylnaphthalene and 0.05wt% zinc iodide catalyst were fully stirred and mixed to form a coal slurry, and the coal slurry was thermally dissolved and catalyzed to generate a thermally soluble product. The hydrogenation temperature was 420°C and the pressure was 6MPa, hydrogen oil volume ratio is 500, space velocity 1h -1 , separating the obtained thermally liquefied product into light thermally soluble and heavy components of lignite thermally soluble and catalyzed with a boiling point of 500°C;

[0031] Grind the heavy components of the lignite hot-melt catalyst through a 200-mesh sieve, and set aside; weigh 110kg of the crushed heavy components, place them in a nitrogen-enclosed environment of 1MPa, and then raise the temperature at a heating rate of 6°C / min to 320°C, keep the temperature constant for 2 hours, then raise the temperature t...

Embodiment 2

[0033] This embodiment provides a method for preparing foamed carbon, specifically comprising:

[0034] 42wt% lignite powder, 56.9wt% 1-methylnaphthalene and 1.1wt% zinc iodide catalyst were fully stirred and mixed to form a coal slurry, and the coal slurry was thermally dissolved and catalyzed to generate a thermally soluble product. The hydrogenation temperature was 445°C and the pressure was 10MPa, hydrogen-to-oil volume ratio 520, space velocity 0.8h -1 , separating the obtained thermally liquefied products into light thermally soluble substances and lignite thermally soluble catalytic heavy components with a boiling point >500°C;

[0035]The heavy component of the lignite hot-melt catalyst is crushed through a 200-mesh sieve, and set aside; weigh 110kg of the crushed heavy component, place it in a nitrogen-enclosed environment of 2MPa, and then raise the temperature at a heating rate of 5°C / min to 280°C, keep the temperature constant for 2 hours, then raise the temperatu...

Embodiment 3

[0037] This embodiment provides a method for preparing foamed carbon, specifically comprising:

[0038] 42wt% lignite powder, 56.9wt% 1-methylnaphthalene and 1.1wt% zinc iodide catalyst were fully stirred and mixed to form a coal slurry, and the coal slurry was hot-melted and catalyzed to generate a hot solution product. The hydrogenation temperature was 445 °C and the pressure was 10MPa, hydrogen-to-oil volume ratio 520, space velocity 0.8h -1 , separating the obtained thermally liquefied products into light thermally soluble substances and lignite thermally soluble catalytic heavy components with a boiling point >500°C;

[0039] The heavy component of the lignite hot-melt catalyst is crushed through a 200-mesh sieve and set aside; weigh 110kg of the crushed heavy component, place it in a nitrogen-enclosed environment of 1.5MPa, and then, at a heating rate of 6°C / min Raise the temperature to 410°C, hold the temperature for 3 hours, then raise the temperature to 510°C at a he...

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
softening pointaaaaaaaaaa
boiling pointaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of carbon foam preparation, and in particular relates to carbon foam and a preparation method thereof. The present invention uses lignite thermally soluble catalytic heavy components as raw materials, and the prepared foamed carbon is not prone to cracks, has uniform cell size, high compressive strength, good mechanical properties and heat insulation performance, no additives are needed, and pressure relief is controlled. The speed can improve the yield of foamed carbon and the uniformity of the large size of the cells, reduce the probability of defects such as cracks in the foamed carbon, and is conducive to obtaining foamed carbon with uniform cells and higher mechanical properties, and avoiding the rapid pressure release of foamed carbon. The uneven size of the cells makes the carbon foam prone to microcracks and reduces the mechanical properties of the carbon foam; in addition, the present invention can also avoid the rapid increase of the temperature of the system by tens of degrees Celsius caused by rapid pressure release, which causes more defects in the carbon foam question.

Description

technical field [0001] The invention belongs to the technical field of carbon foam preparation, and in particular relates to carbon foam and a preparation method thereof. Background technique [0002] Carbon foam is an emerging material with both structural and functional properties. It is a lightweight carbon material with three-dimensional crosslinked pores, pore walls, and different pore crosslinked parts. As a three-dimensional network porous carbonaceous material, foamed carbon not only has high strength, low thermal conductivity, low density, small thermal expansion coefficient, high temperature resistance, oxidation resistance, acid and alkali resistance, low water absorption, no volatile substances, but also has relatively Good formability and processability have important application prospects in the fields of aerospace thermal insulation materials, marine radar absorbing materials, A-level energy-saving building thermal insulation materials, and high-temperature pi...

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): C01B32/05
Inventor 吴克黄形徐熠陈翀
Owner 广东煤基碳材料研究有限公司
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