Comparison of chemical and physical activation processes at obtaining adsorbents from moroccan oil shale
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Article de revue
Este ítem está publicado en
Oil Shale. 2020, vol. 37, n° 2, p. 139-157
Resumen en inglés
Within the Moroccan natural resources valorisation scheme, new
adsorbents have been prepared from oil shale by chemical and physical
activation processes. The activation process the authors have developed in
this ...Leer más >
Within the Moroccan natural resources valorisation scheme, new
adsorbents have been prepared from oil shale by chemical and physical
activation processes. The activation process the authors have developed in
this study give effective adsorbent materials. In view of the physico-chemical
properties of these materials and application to the treatment of water loaded
with a metal (Cr6+ ion) or organic (methylene blue (MB)) pollutant, it is
concluded that the chemical activation process of oil shale at low temperature
(250 °C) affords the best material. The material’s yield is good in comparison
with the physical activation at the same temperature and the process is energy
saving differently from that at 450 °C. Moreover, the chemical activation of
oil shale with phosphoric acid at 250 °C produces a material with a good
yield (about 70%), a high specific surface area (approximately 600 m2
/g) and a highly porous structure, which gives it a high retention of methylene blue
and the Cr6+ ion.< Leer menos
Palabras clave en inglés
Moroccan oil shale
adsorbents
activation process
specific surface area