Premium
Characterization of Brazilian high‐ash coals by small‐angle X‐ray diffraction methods
Author(s) -
González H. J.,
Torriani I. L.,
Luengo C. A.
Publication year - 1982
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889882011947
Subject(s) - small angle x ray scattering , thermal treatment , porosity , specific surface area , materials science , characterization (materials science) , carbon fibers , mineralogy , diffraction , fly ash , thermal , x ray crystallography , scattering , analytical chemistry (journal) , chemistry , composite material , chromatography , thermodynamics , optics , nanotechnology , physics , biochemistry , composite number , catalysis
Changes in the microporosity of several types of Brazilian high‐ash coals have been analyzed by small‐angle X‐ray scattering as a function of thermal treatment. Pore size, determined using Guinier plots, decreased following thermal treatment of the samples. The modification of porosity induced by thermal treatment was similar for high‐ash and low‐ash coals, from which it may be inferred that mineral content is not a determining factor in the process of pore formation. Internal surface area for the samples was calculated with SAXS data. A correlation is established between the internal surface area values obtained and the carbon content and heat‐treatment temperatures of the samples.