| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1198299 | Journal of Analytical and Applied Pyrolysis | 2014 | 10 Pages |
•We report a research of bulk pyrolysis of sucrose in the presence of activating agents.•Microporous carbons were formed by non-catalytic bulk carbonization of sucrose.•Carbons with increased Vmicro and Vsupermicro were obtained in the presence of H3PO4.•Mainly mesoporous carbons were formed in the presence of zinc chloride.•Thermal activation with steam results in the significant increase of H2 adsorption.
The comparative research of bulk carbonization of sucrose at different temperatures (Ar, 400–900 °C) in the presence of activating agents (H3PO4 and ZnCl2) and water vapor was carried out. X-ray diffraction, nitrogen and hydrogen adsorption and IR spectroscopy were used for investigating of the structural and sorption characteristics of the obtained materials. It was shown that in conditions of non-catalytic bulk carbonization of sucrose homogeneous microporous carbons were formed; with the increasing of the temperature of carbonization micropore volume and adsorption of hydrogen (up to 1.48 wt.%, 900 °C) were increased. The essential effect of using an activating agent and/or catalytic agent on the porous structure of carbons: in the presence of phosphoric acid carbons with increased micro- and supermicropore volume were obtained. Mainly mesoporous carbons were formed in the presence of zinc chloride. It was established that thermal activation with steam at 800 and 850 °C results in the significant increase of specific surface area of the carbons (SBET – up to 2287 m2/g) and hydrogen adsorption – up to 1.88 and 1.99 wt.% accordingly.
