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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Imprimir: 1093-3611
ISSN En Línea: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v14.i1-2.20
pages 11-27

MODELING BIO-OIL GASIFICATION BY A PLASMA PROCESS

H. Lorcet
CEA, DEN, DTN, 13108, St Paul lès Durance Cedex
M. Brothier
CEA, DEN, DTN, 13108, St Paul lès Durance Cedex
D. Guenadou
CEA, DEN, DTN, 13108, St Paul lès Durance Cedex
C. Latge
CEA, DEN, DTN, 13108, St Paul lès Durance Cedex
Armelle Vardelle
ENSIL, ESTER Technopole, 87068 Limoges - France

SINOPSIS

Gasification is a thermochemical path that makes it possible to convert biomass into gases. The main requirements for the transformation process are both a high mass rate transformation and a low content of organic impurities (tars) in the produced gas (syngas).
An allothermal process of gasification, based on the use of thermal plasma to supply the energy for bio-oil conversion is being studied at the CEA (Commissariat à l'Energie Atomique) Cadarache, bio-oil being produced by a pre-processing of biomass by flash pyrolysis. The purpose of this study is to demonstrate the feasibility and cost-effectiveness of the gasification of bio-oil by a thermal plasma process. Indeed, it is expected that the high level of temperature and presence of oxygenated active species in the plasma flow may help to reduce the tar content below 0.1 mg/Nm3, a required value for the Fischer Tropsch post-process and increase the mass yield.
The first step of the work consists in developing a model that takes into account the plasma flow inside the reactor and the liquid material treatment in order to increase the understanding of the process and determine the optimal operating parameters of the plasma reactor.
The bio-oil injected under the form of a liquid jet is subjected to fragmentation, evaporation and chemical reactions in the plasma jet. The modeling work presented in this paper is focused on the break up of the droplets formed by the disintegration of the liquid jet. It uses the Computational Fluid Dynamics (CFD) code Fluent 6.3. Numerical predictions are compared with experimental data obtained with a shadowgraphy system.


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