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Influence of carbonization conditions on the development of different types of optical anisotropy in cokes

Abstract

The vitrain components of a series of coal samples were carbonized at temperatures from 400 to 1000/sup 0/C at different rates of heating ranging from 0.5 to 10/sup 0/K/min and utilizing soaking times up to 24 hr. Polished specimens prepared from the carbonized products were examined microscopically under polarized light in order to determine the proportions of the various types of optical anisotropy present in them. The variations in heating rate and soaking time were found to exert little significant influence on the anisotropy developed in high-temperature cokes. But in semicokes produced at carbonization temperatures within the plastic range the influence of the carbonization conditions was much more pronounced with the effects being interrelated. Decreasing the heating rate or increasing the soaking time led to the optical anisotropy generally becoming detectable at lower carbonization temperatures. Fast heating rates caused an increase in the rate of transformation of the fine-grain mosaic anisotropy into coarser-grained types of anisotropy and increased soaking time led to enhanced anisotropic development in the semicokes produced at temperatures within the plastic range. The type of anisotropy developed in cokes is closely related to the release of volatile matter and the plasticity developed during carbonization and the conclusion  More>>
Publication Date:
Jan 01, 1975
Product Type:
Journal Article
Reference Number:
EDB-76-068697
Resource Relation:
Journal Name: Carbon; (United Kingdom); Journal Volume: 13:6
Subject:
01 COAL, LIGNITE, AND PEAT; COAL; CARBONIZATION; COKE; ANISOTROPY; MICROSCOPY; SEMICOKE; TEMPERATURE DEPENDENCE; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; DECOMPOSITION; ENERGY SOURCES; FOSSIL FUELS; FUELS; 010401* - Coal & Coal Products- Carbonization- (-1987)
OSTI ID:
7272146
Research Organizations:
British Carbonization Research Association, Derbyshire, Eng.
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: CRBNA
Submitting Site:
TIC
Size:
Pages: 509-514
Announcement Date:

Citation Formats

Patrick, J W, Reynolds, M J, and Shaw, F H. Influence of carbonization conditions on the development of different types of optical anisotropy in cokes. United Kingdom: N. p., 1975. Web. doi:10.1016/0008-6223(75)90053-6.
Patrick, J W, Reynolds, M J, & Shaw, F H. Influence of carbonization conditions on the development of different types of optical anisotropy in cokes. United Kingdom. doi:10.1016/0008-6223(75)90053-6.
Patrick, J W, Reynolds, M J, and Shaw, F H. 1975. "Influence of carbonization conditions on the development of different types of optical anisotropy in cokes." United Kingdom. doi:10.1016/0008-6223(75)90053-6. https://www.osti.gov/servlets/purl/10.1016/0008-6223(75)90053-6.
@misc{etde_7272146,
title = {Influence of carbonization conditions on the development of different types of optical anisotropy in cokes}
author = {Patrick, J W, Reynolds, M J, and Shaw, F H}
abstractNote = {The vitrain components of a series of coal samples were carbonized at temperatures from 400 to 1000/sup 0/C at different rates of heating ranging from 0.5 to 10/sup 0/K/min and utilizing soaking times up to 24 hr. Polished specimens prepared from the carbonized products were examined microscopically under polarized light in order to determine the proportions of the various types of optical anisotropy present in them. The variations in heating rate and soaking time were found to exert little significant influence on the anisotropy developed in high-temperature cokes. But in semicokes produced at carbonization temperatures within the plastic range the influence of the carbonization conditions was much more pronounced with the effects being interrelated. Decreasing the heating rate or increasing the soaking time led to the optical anisotropy generally becoming detectable at lower carbonization temperatures. Fast heating rates caused an increase in the rate of transformation of the fine-grain mosaic anisotropy into coarser-grained types of anisotropy and increased soaking time led to enhanced anisotropic development in the semicokes produced at temperatures within the plastic range. The type of anisotropy developed in cokes is closely related to the release of volatile matter and the plasticity developed during carbonization and the conclusion is drawn that the balance between these factors controls the extent of the anisotropic development.}
doi = {10.1016/0008-6223(75)90053-6}
journal = {Carbon; (United Kingdom)}
volume = {13:6}
journal type = {AC}
place = {United Kingdom}
year = {1975}
month = {Jan}
}