Experimental study on fast pyrolysis of free-falling millimetric biomass particles between 800°C and 1000°C

FUEL

卷:106

Article

Chen, Li¹  Dupont, Capucine¹  Salvador, Sylvain²  Grateau, Maguelone¹  Boissonnet, Guillaume¹  Schweich, Daniel³ 

[1] CEA Grenoble, DRT, LITEN, DTBH,LTB, F-38054 Grenoble, France

[2] CNRS Mines Albi Carmaux, Ctr RAPSODEE, UMR 5302, F-81013 Route De Teillet, Albi, France

[3] CPE Lyon, CNRS, LGPC, F-69616 Villeurbanne, France

关键词: Biomass;    Fast pyrolysis;    Drop tube;    Particle size;    Kinetics;   

DOI  :  10.1016/j.fuel.2012.11.058

来源: Elsevier

【 摘 要 】

Pyrolysis experiments were performed between 800 degrees C and 950 degrees C on wood particles with diameters from 350 to 800 mu m in a lab-scale drop tube reactor to reproduce surface heat flux representative of gasifiers conditions. It was shown that particle size affected the required pyrolysis time but changed neither gas/tar/char mass yields nor composition of the products at the end of pyrolysis. The initial particle size also affected the resulting char morphology: the larger the biomass particles, the more fibrous the char. Temperature had influence neither on gas/tar/char mass yields nor on gas and solid elemental composition at the end of pyrolysis, but significantly changed the yields of individual gas species. Whatever the conditions tested, a significant shrinkage could be observed on particles during pyrolysis. These experimental results confirm the strong coupling between chemical reactions, particle geometrical properties and heat transfers during pyrolysis under these conditions. (C) 2012 Elsevier Ltd. All rights reserved.

【 授权许可】

Free