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The mechanism for thermal decomposition of cellulose and its main products

The mechanism for thermal decomposition of cellulose and its main products
The mechanism for thermal decomposition of cellulose and its main products
Experiment is performed to investigate the mechanism of the cellulose pyrolysis and the formation of the main products. The evolution of the gaseous products is examined by the 3-D FTIR spectrogram at the heating rate of 5-60 K/min. A pyrolysis unit, composed of fluidized bed reactor, carbon filter, vapour condensing system and gas storage, is employed to investigate the products of the cellulose pyrolysis under different temperatures (430-730 degrees C) and residence time (0.44-1.32 s). The composition in the bio-oil is characterized by GC-MS while the gases sample is analyzed by GC.

The effects of temperature and residence time on the main products in bio-oil (LG, 5-HMF, FF, HAA, HA and PA) are examined thoroughly. Furthermore the possible routes for the formation of the products are developed from the direct conversion of cellulose molecules and the secondary reactions of the fragments. It is found that the formation of CO is enhanced with elevated temperature and residence time, while slight change is observed for the yield of CO(2).
cellulose, pyrolysis, TG–FTIR, levoglucosan, bio-oil
0960-8524
6496-6504
Shen, D. K.
ed2f2392-6ae0-4628-9fd5-f1a976af3974
Gu, S.
a6f7af91-4731-46fe-ac4d-3081890ab704
Shen, D. K.
ed2f2392-6ae0-4628-9fd5-f1a976af3974
Gu, S.
a6f7af91-4731-46fe-ac4d-3081890ab704

Shen, D. K. and Gu, S. (2009) The mechanism for thermal decomposition of cellulose and its main products. Bioresource Technology, 100 (24), 6496-6504. (doi:10.1016/j.biortech.2009.06.095).

Record type: Article

Abstract

Experiment is performed to investigate the mechanism of the cellulose pyrolysis and the formation of the main products. The evolution of the gaseous products is examined by the 3-D FTIR spectrogram at the heating rate of 5-60 K/min. A pyrolysis unit, composed of fluidized bed reactor, carbon filter, vapour condensing system and gas storage, is employed to investigate the products of the cellulose pyrolysis under different temperatures (430-730 degrees C) and residence time (0.44-1.32 s). The composition in the bio-oil is characterized by GC-MS while the gases sample is analyzed by GC.

The effects of temperature and residence time on the main products in bio-oil (LG, 5-HMF, FF, HAA, HA and PA) are examined thoroughly. Furthermore the possible routes for the formation of the products are developed from the direct conversion of cellulose molecules and the secondary reactions of the fragments. It is found that the formation of CO is enhanced with elevated temperature and residence time, while slight change is observed for the yield of CO(2).

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Published date: December 2009
Keywords: cellulose, pyrolysis, TG–FTIR, levoglucosan, bio-oil

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Local EPrints ID: 149221
URI: http://eprints.soton.ac.uk/id/eprint/149221
ISSN: 0960-8524
PURE UUID: 4f1315f3-3cb0-4932-853d-98fd2395784f

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Date deposited: 30 Apr 2010 13:09
Last modified: 14 Mar 2024 01:05

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Contributors

Author: D. K. Shen
Author: S. Gu

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