Characterization of char and soot from millimetric wood particles pyrolysis in a drop tube reactor between 800 °C and 1400 °C

FUEL

卷:121

Article

Septien, S.¹  Valin, S.¹  Peyrot, M.¹  Dupont, C.¹  Salvador, S.² 

[1] CEA Grenoble, F-38054 Grenoble 09, France

[2] CNRS UMR 5302, Mines Albi, RAPSODEE, F-81013 Albi 9, France

关键词: Biomass pyrolysis;    Char;    Soot;    Steam gasification;    Thermal annealing;   

DOI  :  10.1016/j.fuel.2013.12.026

来源: Elsevier

【 摘 要 】

Char and soot characterization was performed for samples obtained from beech particles pyrolysis in a drop tube reactor at various temperatures and residence times. Firstly, an experimental study was performed and highlights the variation of char and soot composition and reactivity with operating conditions. A structure ordering with temperature for soot samples was also experimentally put into evidence. These variations are believed to be consequence of structural changes during char thermal annealing and soot formation process, affecting both carbonaceous matrix and mineral matter. Secondly, a semi-empirical model was developed and validated with thermogravimetry experiments. This model was then used for conversion time estimation in conditions representative of an entrained flow reactor, and shows that a complete conversion of char and soot is possible in a few seconds under severe operating conditions. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

Free