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Hierarchical mesoporous carbon particles with bimodal (3.5–4.2nm and 5–12nm) could be obtained by starch carbonization and trimodal (3.5–4.2nm, 6–13nm and 13–22nm) mesopores were derived from starch by using colloidal silica particles as template via one-step approach.
The sorption isotherms of xylenes in CoAlPO 4 -5 were measured by the gravimetric technique at 342K. The isotherms of para- and meta-xylenes followed typical type-I and could be well fitted by the Langmuir model; while the isotherm of ortho-xylene did not show a distinct saturation with the increase of pressure and could be then described by the Freundlich equation. In opposition to the adsorption...
Mesopore carbon was prepared from commercial activated carbon by catalytic steam activation over yttrium and cerium oxides from 680 to 870 o C. The pore structures were determined by adsorption and desorption of nitrogen isotherms at 77K. XRD and TEM were used to monitor the metal oxides changing after activation. It was found that the steam activation process with catalysts was composed of...
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