The pyrolytic characteristics and kinetics of new marginal soil energy plant Helianthus annuus stalk were investigated using\r\nthermogravimetric (TG)method from50 to 800�°Cinan inert argonatmosphere at different heatingrates of 5, 10,20and30�°Cmin-1.\r\nThe kinetic parameters of activation energy and pre-exponential factor were deduced by Popescu, Flynn-Wall-Ozawa (FWO), and\r\nKissinger-Akahira-Sunose (KAS) methods, respectively.The results showed that three stages appeared in the thermal degradation\r\nprocess.Theprimary devolatilization stage of H. annuus stalk can be described by the Avrami-Erofeev function (?? = 4).The average\r\nactivation energy of H. annuus stalk was only 142.9 kJmol-1. There were minor kinetic compensation effects between the preexponential\r\nfactor and the activation energy.Theresults suggest thatH. annuus stalk is suitable for pyrolysis, and more importantly,\r\nthe experimental results and kinetic parameters provided useful information for the design of pyrolytic processing system using H.\r\nannuus stalk as feedstock.
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