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Journal of Energy
Volume 2013, Article ID 427049, 8 pages
Research Article

A Kinetic Study of Marginal Soil Energy Plant Helianthus annuus Stalk Pyrolysis

1College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
2Key Laboratory of Low-carbon Energy Chemical Engineering in Universities of Shandong, Shandong University of Science and Technology, Qingdao 266590, China

Received 17 December 2012; Accepted 21 January 2013

Academic Editor: Xiumin Jiang

Copyright © 2013 Huaxiao Yan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The pyrolytic characteristics and kinetics of new marginal soil energy plant Helianthus annuus stalk were investigated using thermogravimetric (TG) method from 50 to 800°C in an inert argon atmosphere at different heating rates of 5, 10, 20, and 30°C min−1. The kinetic parameters of activation energy and pre-exponential factor were deduced by Popescu, Flynn-Wall-Ozawa (FWO), and Kissinger-Akahira-Sunose (KAS) methods, respectively. The results showed that three stages appeared in the thermal degradation process. The primary devolatilization stage of H. annuus stalk can be described by the Avrami-Erofeev function . The average activation energy of H. annuus stalk was only 142.9 kJ mol−1. There were minor kinetic compensation effects between the pre-exponential factor and the activation energy. The results suggest that H. annuus stalk is suitable for pyrolysis, and more importantly, the experimental results and kinetic parameters provided useful information for the design of pyrolytic processing system using H. annuus stalk as feedstock.