Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Morphology and Structure of the Mesophase in Coal Tar Pitch

Morphology and Structure of the Mesophase in Coal Tar Pitch By scanning electron microscopy, X-ray phase analysis, and X-ray structural analysis, the morphology and structure of the mesophase is studied in the series: coal tar → coal tar pitch → α fraction → coke residue obtained on heating the [alpha] fraction at 1200°C. The X-ray structural parameters are determined: the longitudinal and transverse dimensions of the stacks of polyarene layers (La and Lc); the distance between layers (d002); and the number of layers in each stack (N). In carbonization, the two-dimensional carbon mesophase structures are converted to three-dimensional stacks. The mesophase consists of a turbostratic carbon structure and graphite-like phases. The transverse dimension of the stack formed on structuring is Lc = 1–2 nm; its longitudinal dimension is La = 2–6 nm. The mean distance between the layers in the samples is d002 = 0.346–0.355 nm. The pitch has an isotropic structure since the mesophase consists of spheroids. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Coke and Chemistry Springer Journals

Morphology and Structure of the Mesophase in Coal Tar Pitch

Loading next page...
 
/lp/springer-journals/morphology-and-structure-of-the-mesophase-in-coal-tar-pitch-ec8vDqXn9x

References (34)

Publisher
Springer Journals
Copyright
Copyright © Allerton Press, Inc. 2022. ISSN 1068-364X, Coke and Chemistry, 2022, Vol. 65, No. 12, pp. 607–613. © Allerton Press, Inc., 2022. Russian Text © The Author(s), 2022, published in Koks i Khimiya, 2022, No. 12, pp. 37–43.
ISSN
1068-364X
eISSN
1934-8398
DOI
10.3103/s1068364x22700363
Publisher site
See Article on Publisher Site

Abstract

By scanning electron microscopy, X-ray phase analysis, and X-ray structural analysis, the morphology and structure of the mesophase is studied in the series: coal tar → coal tar pitch → α fraction → coke residue obtained on heating the [alpha] fraction at 1200°C. The X-ray structural parameters are determined: the longitudinal and transverse dimensions of the stacks of polyarene layers (La and Lc); the distance between layers (d002); and the number of layers in each stack (N). In carbonization, the two-dimensional carbon mesophase structures are converted to three-dimensional stacks. The mesophase consists of a turbostratic carbon structure and graphite-like phases. The transverse dimension of the stack formed on structuring is Lc = 1–2 nm; its longitudinal dimension is La = 2–6 nm. The mean distance between the layers in the samples is d002 = 0.346–0.355 nm. The pitch has an isotropic structure since the mesophase consists of spheroids.

Journal

Coke and ChemistrySpringer Journals

Published: Dec 1, 2022

Keywords: Keywords: coal tar; coal tar pitch; α fraction; mesophase; X-ray diffraction; X-ray structural analysis

There are no references for this article.