Adsorption of Naphthalene on Activated Wood Charcoal Derived from Biomass Gasification. Issue 6 (18th March 2021)

• Record Type: Journal Article
• Authors: Gradel, Andy; Wünning, Joachim Alfred; Plessing, Tobias; Jess, Andreas
• Is Part Of: Chemical engineering & technology. Volume 44:Issue 6(2021)
• Page Start: 972
• Page End: 979
• Publication Date: 2021-03-18
• Subjects: Activated wood charcoal -- Adsorption -- Biomass gasification -- Breakthrough modeling -- Naphthalene; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.201900632
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: During gasification and/or pyrolysis of wooden biomass, charcoal is formed as a solid intermediate or product. In CO2 ‐ and H2 O‐rich atmospheres at high temperatures, a high specific surface area of several 100 m 2 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. Abstract : Thermal gasification of biomass is an attractive technology for sustainable conversion to syngas. For a new approach to biomass gasification, experimental and model studies on the adsorption properties of naphthalene on wood charcoal from gasification processes are performed. Adsorption isotherms, breakthrough curves, and a numerical model are presented to improve reactor design and gas cleanup performance.