Surface structural and energetic heterogeneity of carbon materials prepared from corn grains using steam and H3PO4‐steam activations |
| |
| Authors: | Wang‐Geun Shim Chan Kim Jae‐Wook Lee M S Balathanigaimani Hee Moon |
| |
| Institution: | 1. Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Australia;2. AMOMEDI Co, Ltd, Gimpo, South Korea;3. Department of Chemical and Biochemical Engineering, Chosun University, Gwangju, South Korea;4. Department of Chemical Engineering, Rajiv Gandhi Institute of Petroleum Technology, Raebareli, India;5. School of Applied Chemical Engineering, Chonnam National University, Gwangju, South Korea |
| |
| Abstract: | 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, 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. |
| |
| Keywords: | corn grain activated carbon chemical– physical activation structural characterization surface fractal dimension adsorption energy distribution |
|
|
