Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6657187 | Fuel Processing Technology | 2014 | 12 Pages |
Abstract
An experimental study of thermally thick biomass (beech wood spheres) pyrolysis under high radiative heat flux was performed. The influence of sample diameter (5-20Â mm), incident heat flux (60-180Â kW/m2) and initial moisture content (1-50Â wt%) was studied. Char yields and temperature histories were monitored. Initial moisture content impact was highlighted. Indeed, steam coming from the sample core drying can gasify the external char layer, reducing therefore the char yield and increasing syngas production. This study was supported by a 2D unsteady numerical model of biomass degradation (mass, momentum and heat conservation coupled with Broido-Shafizadeh reaction scheme). This model gave more insight about phenomena occurring inside the degrading sample. It revealed that a pyrolysis front follows up a drying one. Therefore, steam is forced out of the sample through a high temperature char layer, making char steam gasification chemically possible.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Victor Pozzobon, Sylvain Salvador, Jean Jacques Bézian, Mouna El-Hafi, Yannick Le Maoult, Gilles Flamant,