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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/22556

Title: Rapeseed and Raspberry Seed Cakes as Inexpensive Raw Materials in the Production of Activated Carbon by Physical Activation: Effect of Activation Conditions on Textural and Phenol Adsorption Characteristics
Authors: Smets, Koen
De Jong, Mats
Lupul, Iwona
Gryglewicz, Grazyna
Schreurs, Sonja
Carleer, Robert
Yperman, Jan
Issue Date: 2016
Publisher: MDPI AG
Citation: MATERIALS, 9(7) (ART N° 565)
Abstract: The production of activated carbons (ACs) from rapeseed cake and raspberry seed cake using slow pyrolysis followed by physical activation of the obtained solid residues is the topic of this study. The effect of activation temperature (850, 900 and 950 degrees C), activation time (30, 60, 90 and 120 min) and agent (steam and CO2) on the textural characteristics of the ACs is investigated by N-2 adsorption. In general, higher activation temperatures and longer activation times increase the BET specific surface area and the porosity of the ACs, regardless of the activation agent or raw material. Steam is more reactive than CO2 in terms of pore development, especially in the case of raspberry seed cake. The performance of the ACs in liquid adsorption is evaluated by batch phenol adsorption tests. Experimental data are best fitted by the Freundlich isotherm model. Based on total yield, textural characteristics and phenol adsorption, steam activation at 900 degrees C for 90 min and CO2 activation at 900 degrees C for 120 min are found as the best activation conditions. Raspberry seed cake turns out to be a better raw material than rapeseed cake. Moreover, AC from raspberry seed cake produced by steam activation at 900 degrees C for 90 min performs as well as commercial AC (Norit GAC 1240) in phenol adsorption. The adsorption kinetics of the selected ACs are best fitted by the pseudo-second-order model.
Notes: [Smets, Koen; De Jong, Mats; Carleer, Robert; Yperman, Jan] Hasselt Univ, Res Grp Appl & Analyt Chem, CMK, Agoralaan Gebouw D, B-3590 Diepenbeek, Belgium. [Lupul, Iwona; Gryglewicz, Grazyna] Wroclaw Univ Technol, Div Polymer & Carbonaceous Mat, Fac Chem, Ul Gdanska 7-9, PL-50344 Wroclaw, Poland. [Schreurs, Sonja] Hasselt Univ, CMK, NuTeC, Agoralaan Gebouw H, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/22556
DOI: 10.3390/ma9070565
ISI #: 000380761500067
ISSN: 1996-1944
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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