Excess Adsorption Isotherms of Hydrogen on Activated Carbons from Agricultural Waste Materials.

0474403 - ÚCHP 2018 RIV DE eng J - Článek v odborném periodiku
Soukup, Karel - Hejtmánek, Vladimír - Cruz, G.J.F. - Jandová, Věra - Šolcová, Olga
Excess Adsorption Isotherms of Hydrogen on Activated Carbons from Agricultural Waste Materials.
Chemical Engineering & Technology. Roč. 40, č. 5 (2017), s. 900-906. ISSN 0930-7516. E-ISSN 1521-4125.
[International Conference on Process Integration, Modeling and Optimization for Energy Savings and Pollution Reduction (PRES) /19./. Prague, 27.08.2016-31.08.2016]
Grant CEP: GA ČR GA15-14228S
Grant ostatní: NUT(PE) 0722-2014/UNT-R
Institucionální podpora: RVO:67985858
Klíčová slova: activated carbon * hydrogen * excess adsorption
Obor OECD: Chemical process engineering
Impakt faktor: 1.588, rok: 2017

Four activated carbons based on red mombin seeds, cocoa pod husk, the external part of mango pits and coffee husk were prepared by chemical activation using zinc chloride. Adsorption isotherms of hydrogen measured by volumetric method under supercritical conditions corresponding to the three temperature levels (77 K, 273 K and 298 K) and the pressure range of 0–1000 kPa were determined. The dependence of the hydrogen adsorbed amount on equilibrium pressure was linear for all adsorption isotherms measured at 273 and 298 K. Corresponding excess adsorption experimental data were fitted by Henry’s adsorption isotherm with excellent goodness of fit. Moreover, Dubinin-Radushkevich adsorption isotherm was demonstrated to fit the excess adsorption data at 77 K with high accuracy.
Trvalý link: http://hdl.handle.net/11104/0271467