Adsorption of Naphthalene on Activated Wood Charcoal Derived from Biomass Gasification

Titelangaben

Gradel, Andy ; Wünning, Joachim Alfred ; Plessing, Tobias ; Jess, Andreas:
Adsorption of Naphthalene on Activated Wood Charcoal Derived from Biomass Gasification.
In: Chemical Engineering & Technology. Bd. 44 (2021) Heft 6 . - S. 972-979.
ISSN 1521-4125
DOI: https://doi.org/10.1002/ceat.201900632

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Abstract

Abstract During gasification and/or pyrolysis of wooden biomass, charcoal is formed as a solid intermediate or product. In CO2- and H2O-rich atmospheres at high temperatures, a high specific surface area of several 100 m2 per gram of charcoal may be reached. Common biomass gasifiers aim at a charcoal conversion of 100 %. Up to now, the option of a subsequent usage of the charcoal for adsorption of tar compounds has rarely been considered but is an interesting option to produce a clean syngas in a downstream adsorption unit. Experimental studies show an adsorption capacity of up to 0.4 g of tar per gram of charcoal using naphthalene as a model substance for tar. Respective adsorption isotherms, breakthrough curves in a fixed-bed adsorber, and a kinetic breakthrough model are presented.