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A small angle X-ray scattering study on the porosity of anthracites by N Cohaut; C Blanche; D Dumas; J.M Guet; J.N Rouzaud is a Materials Science article available to read on EtoBox.

What is A small angle X-ray scattering study on the porosity of anthracites about?

SAXS technique is applied on anthracites to study their heterogeneous microtexture and the mechanism of partial graphitization during a thermal treatment up to 28008C. The effects of heat treatment on the porosity were observed at 16008C and 28008C and compared with homogeneous microtextures of mesoporous saccharose-based coke and lamellar anthracene-based coke. The main feature observed on raw anthracites, displaying the least degree of natural maturation and the largest isotropic distribution of aromatic units, is the occurrence of a characteristic distance of 20 A. After a HTT of 16008C, the porosity of anthracites is close to 10-12%, carbon domains still being weakly organized, particularly on raw anthracites with the higher isotropic microtexture. Discrepancies resulting from the graphitization degree reached at 28008C were shown using the porosity and the mean length of chord in the matter. The porosity varies respectively from 19%, ̊corresponding to a mean length chord of 97 A for least graphitized anthracites, to 10% and a mean length chord of 235 A for the most graphitized one.

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Author

N Cohaut; C Blanche; D Dumas; J.M Guet; J.N Rouzaud

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0008-6223)

Published

2000

Language

EN

Field

Materials Science (Physical Sciences)