Investigating tar formation at low pressures in wood gasification systems, applying a novel thermo-chemical simulation model

Boiger, Gernot Kurt; Buff, Vincent; Zubiaga, Asier; Fassbind, Adrian; Caels, Pedro

doi:10.21256/zhaw-19154

Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-19154

Publication type:	Conference paper
Type of review:	Peer review (publication)
Title:	Investigating tar formation at low pressures in wood gasification systems, applying a novel thermo-chemical simulation model
Authors:	Boiger, Gernot Kurt Buff, Vincent Zubiaga, Asier Fassbind, Adrian Caels, Pedro
et. al:	No
DOI:	10.21256/zhaw-19154
Proceedings:	Proceedings of the ICPS19 : 5th international conference on polygeneration strategies
Editors of the parent work:	Müller, Stephan Fuchs, Michael
Volume(Issue):	5
Page(s):	134
Pages to:	142
Conference details:	ICPS19 - 5th International Conference on Polygeneration Strategies, Vienna, 18-20 November 2019
Issue Date:	18-Dec-2019
Publisher / Ed. Institution:	Verein zur Förderung zukunftsfähiger Energietechnik auf Basis der Polygenerationsstrategie aus Biomasse
Publisher / Ed. Institution:	Vienna
ISBN:	978-3-9503671-1-9
Language:	English
Subjects:	Wood gas; Simulation; Tar formation; Thermo dynamics
Subject (DDC):	660: Chemical engineering
Abstract:	Even-though wood gasification remains a promising technology regarding de-centralized sustainable energy supply, its main limitations, namely the issues of unsteady operation, excessive tar-formation and consequential high maintenance requirements, have never been fully overcome. In order to tackle these deficiencies and to increase the understanding of thermo-chemical wood-gas phase reaction dynamics, a numerical model has been created. After validating the simulator against comparable software, it has been applied to predict and thus understand tar-formation phenomena within a small experimental co-current gasification system. This work particularly focuses on the investigation and minimization of tar-formation phenomena within low-pressure zones (e.g. downstream of valves) at temperatures T≤500K. Model-based analysis has led to a range of recommended measures, which reduce the occurrence of tars in low-pressure zones. Said recommendations are: i) Decrease gas residence time and ii) increase temperatures in low-pressure zones; iii) Increase hydrogen to carbon ratio as well as iv) oxygen to carbon ratio in the wood gas. While measures i) and ii) require modifications to the plant and/or process itself (e.g. by installing modified pipes or by re-circulating thermal energy via heat-exchangers), measures iii) and iv) can be implemented either by removing coal from the reaction zone or by adding either water or process air to the process.
URI:	https://digitalcollection.zhaw.ch/handle/11475/19154
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Engineering
Organisational Unit:	Institute of Computational Physics (ICP)
Appears in collections:	Publikationen School of Engineering

Files in This Item:

File	Description	Size	Format
2019Boiger-etal_Investigating_tar_formation_at_low_pressures_in_wood_gasification systems.pdf		1.45 MB	Adobe PDF	View/Open

Show full item record

Boiger, G. K., Buff, V., Zubiaga, A., Fassbind, A., & Caels, P. (2019). Investigating tar formation at low pressures in wood gasification systems, applying a novel thermo-chemical simulation model [Conference paper]. In S. Müller & M. Fuchs (Eds.), Proceedings of the ICPS19 : 5th international conference on polygeneration strategies (Vol. 5, pp. 134–142). Verein zur Förderung zukunftsfähiger Energietechnik auf Basis der Polygenerationsstrategie aus Biomasse. https://doi.org/10.21256/zhaw-19154

Boiger, G.K. et al. (2019) ‘Investigating tar formation at low pressures in wood gasification systems, applying a novel thermo-chemical simulation model’, in S. Müller and M. Fuchs (eds) Proceedings of the ICPS19 : 5th international conference on polygeneration strategies. Vienna: Verein zur Förderung zukunftsfähiger Energietechnik auf Basis der Polygenerationsstrategie aus Biomasse, pp. 134–142. Available at: https://doi.org/10.21256/zhaw-19154.

G. K. Boiger, V. Buff, A. Zubiaga, A. Fassbind, and P. Caels, “Investigating tar formation at low pressures in wood gasification systems, applying a novel thermo-chemical simulation model,” in Proceedings of the ICPS19 : 5th international conference on polygeneration strategies, Dec. 2019, vol. 5, pp. 134–142. doi: 10.21256/zhaw-19154.

BOIGER, Gernot Kurt, Vincent BUFF, Asier ZUBIAGA, Adrian FASSBIND und Pedro CAELS, 2019. Investigating tar formation at low pressures in wood gasification systems, applying a novel thermo-chemical simulation model. In: Stephan MÜLLER und Michael FUCHS (Hrsg.), Proceedings of the ICPS19 : 5th international conference on polygeneration strategies. Conference paper. Vienna: Verein zur Förderung zukunftsfähiger Energietechnik auf Basis der Polygenerationsstrategie aus Biomasse. 18 Dezember 2019. S. 134–142. ISBN 978-3-9503671-1-9

Boiger, Gernot Kurt, Vincent Buff, Asier Zubiaga, Adrian Fassbind, and Pedro Caels. 2019. “Investigating Tar Formation at Low Pressures in Wood Gasification Systems, Applying a Novel Thermo-Chemical Simulation Model.” Conference paper. In Proceedings of the ICPS19 : 5th International Conference on Polygeneration Strategies, edited by Stephan Müller and Michael Fuchs, 5:134–42. Vienna: Verein zur Förderung zukunftsfähiger Energietechnik auf Basis der Polygenerationsstrategie aus Biomasse. https://doi.org/10.21256/zhaw-19154.

Boiger, Gernot Kurt, et al. “Investigating Tar Formation at Low Pressures in Wood Gasification Systems, Applying a Novel Thermo-Chemical Simulation Model.” Proceedings of the ICPS19 : 5th International Conference on Polygeneration Strategies, edited by Stephan Müller and Michael Fuchs, vol. 5, Verein zur Förderung zukunftsfähiger Energietechnik auf Basis der Polygenerationsstrategie aus Biomasse, 2019, pp. 134–42, https://doi.org/10.21256/zhaw-19154.