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The porous activated carbons (ACs) were prepared from corn grains through physical (steam) and chemical–physical (H3PO4‐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 H3PO4‐steam activation was studied. The physical properties,...
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