INVESTIGADORES
CUKIERMAN Ana Lea
artículos
Título:
Microporosity and Surface-Area Study of Pine Wood Charcoal by SAXS and CO2 Adsorption Techniques
Autor/es:
J.C.SOUSA; I.L. TORRIANI; C.A. LUENGO; J. FUSCO; A. L. CUKIERMAN
Revista:
JOURNAL OF APPLIED CRYSTALLOGRAPHY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 1991 vol. 24 p. 803 - 808
ISSN:
0021-8898
Resumen:
Pine wood samples (Pinus elliottii) were heat treated
at temperatures from 873 to 2873 K. Small-angle
X-ray scattering (SAXS) and carbon dioxide
adsorption techniques were used to characterize
micropore number, diameter and corresponding
internal surface area (ISA) for all samples. The
adsorption data showed a maximum at about
1273 K, whereas SAXS data indicated a significant
decrease of ISA at those heat-treatment temperatures
(HTT). At higher HTT both techniques showed similar
trends. To investigate these findings further, the
evolution of the turbostratic structure of all samples
was studied from X-ray powder diffraction spectra.
It was then concluded that the dynamics of microcrystallite
growth affect the microporosity by
decreasing the number of micropores and associated
surface area. The increase in ISA observed by
adsorption techniques is due to the creation of a
large number of channels by the expulsion of volatile
matter.