Title :
Metamorphic Grain Pyrolysis and its Kinetic Parameters by Different Methods
Author :
Yao, Lei ; LI, Chuantong
Author_Institution :
Sch. of Power Eng., Nanjing Normal Univ., Nanjing
Abstract :
Metamorphic grain is one kind of biomass. Thermo- gravimetric analysis is used to study the pyrolysis characteristics of two metamorphic grains, metamorphic rice and metamorphic wheat in China, at different heating rates of 5degC/ min, 10degC/ min, 20degC/ min in a stream of N2.Three methods: Coats-Redfern, Doyle and Kissinger, are used to determine the kinetic parameters, including reaction order, frequency factor and activation energies. The results indicate that the kinetic parameters are different with different methods. The pyrolysis process can be described by first-order global model for both metamorphic rice and metamorphic wheat, and activation energy adds along with the increase in heating rates and value of n, with the method of Coats-Redfern. Activation energy in Doyle model is a little smaller and changes in the range of 25 kJ/mol to 50 kJ/mol.
Keywords :
agricultural products; pyrolysis; reaction kinetics; renewable materials; thermal analysis; activation energies; biomass; frequency factor; kinetic parameters; metamorphic grain pyrolysis; metamorphic rice; metamorphic wheat; reaction order; thermo-gravimetric analysis; Ash; Biomass; Frequency; Fuels; Heating; Hydrogen; Kinetic theory; Nitrogen; Power engineering; Temperature;
Conference_Titel :
Power and Energy Engineering Conference, 2009. APPEEC 2009. Asia-Pacific
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-2486-3
Electronic_ISBN :
978-1-4244-2487-0
DOI :
10.1109/APPEEC.2009.4918481