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Surface structural and energetic heterogeneity of carbon materials prepared from corn grains using steam and H 3 PO 4 ‐steam activations
Author(s) -
Shim WangGeun,
Kim Chan,
Lee JaeWook,
Balathanigaimani M. S.,
Moon Hee
Publication year - 2016
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.5903
Subject(s) - adsorption , desorption , nitrogen , activated carbon , chemistry , carbonization , carbon fibers , porosity , surface roughness , chemical engineering , activation energy , surface finish , steam explosion , materials science , analytical chemistry (journal) , metallurgy , composite material , environmental chemistry , pulp and paper industry , organic chemistry , composite number , engineering
The porous activated carbons (ACs) were prepared from corn grains through physical (steam) and chemical–physical (H 3 PO 4 ‐steam) activations. The effects of steam activation temperature (700–900 °C) on pore development, surface roughness, and energetic heterogeneity were investigated in both activations. Also, the effect of prior carbonization on H 3 PO 4 ‐steam activation was studied. The physical properties, surface fractal dimensions, and adsorption energy distributions of ACs were determined from nitrogen adsorption–desorption isotherm data. Both physical and chemical–physical activations show that the AC with higher surface area, relatively smoother surface, and energetically heterogeneous surface could be produced at a maximum steam activation temperature (900 °C). Copyright © 2015 John Wiley & Sons, Ltd.
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