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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 27, 2006
Accepted October 9, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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A study on the mechanism research on cellulose pyrolysis under catalysis of metallic salts

Shurong Wang^† Qian Liu Yanfen Liao¹ Zhongyang Luo Kefa Cen

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China ¹Electric Power College, South China University of Technology, Guangzhou 510640, China

srwang@cmee.zju.edu.cn

Korean Journal of Chemical Engineering, March 2007, 24(2), 336-340(5), 10.1007/s11814-007-5060-x

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Abstract

Experimental research on cellulose pyrolysis under catalysis of metallic salts was done on a thermobalance and a rapid pyrolysis system. Thermogravimetric analysis showed that K+ catalyzed the formation of active cellulose strongly and decreased the activation energy of cellulose pyrolysis. Experimental results indicated that K+ would promote the formation of char and restrain the production of bio-oil largely. Fe2+ had a similar catalysis effect on cellulose pyrolysis with K+. Fe2+ particularly catalyzed the formation of small molecule gaseous product while K+ the formation of char. The addition of K+ or Fe2+ resulted in a reduction of levoglucosan formation, and enhanced the production of hydroxyacetaldehyde and other small molecule components. Levoglucosan and hydroxyacetaldehyde were formed by the decomposition of active cellulose in a parallel mode. The secondary cracking of levoglucosan would also produce hydroxyacetaldehyde. A modified cellulose pyrolysis mechanism model was proposed based on the B-S model.

Keywords

Cellulose Pyrolysis Metallic Salt Catalysis Mechanism

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