The pyrolysis kinetics is very important for the development of biomass thermal chemical conversion technology.By means of the TG-DTG analysis,the pyrolysis behavior and kinetics of corn stalk were investigated with t...The pyrolysis kinetics is very important for the development of biomass thermal chemical conversion technology.By means of the TG-DTG analysis,the pyrolysis behavior and kinetics of corn stalk were investigated with the heating rate from 5℃/min to 100℃/min.The experimental data reveal that the kinetic parameters are much influenced by the operating conditions.And the activation energy of pyrolysis reaction increases with heating rates.Through the kinetics compensation processing,the apparent kinetic parameters of pyrolysis are obtained with the activation energy of 66.5kJ/mol and the frequency factor of 3165s-1.A kinetic model is validated for the corn stalk pyrolysis,which can well fit the experimental results.Moreover,some fundamental data of pyrolysis is provided,which is much valuable for the understanding of process mechanism.展开更多
The pyrolysis of polyvinyl chloride (PVC) w as examined with a thermal gravimetric analyzer (TGA).The experiments were done over the temperature range of room temperature to 1?000?℃ at three heating r ates of 10, 20 ...The pyrolysis of polyvinyl chloride (PVC) w as examined with a thermal gravimetric analyzer (TGA).The experiments were done over the temperature range of room temperature to 1?000?℃ at three heating r ates of 10, 20 and 50?℃/min under nitrogen atmosphere. The results indicate t hat the entire process of PVC pyrolysis consists of three distinct stages. In t his paper the pyrolysis of PVC was modeled by three independent reactions. The corresponding parameters such as activation energy, pre-exponential factor, and reaction order were determined. The kinetic model, composed of three independe nt and consecutive reactions, gives good agreement with the experimental results .展开更多
文摘The pyrolysis kinetics is very important for the development of biomass thermal chemical conversion technology.By means of the TG-DTG analysis,the pyrolysis behavior and kinetics of corn stalk were investigated with the heating rate from 5℃/min to 100℃/min.The experimental data reveal that the kinetic parameters are much influenced by the operating conditions.And the activation energy of pyrolysis reaction increases with heating rates.Through the kinetics compensation processing,the apparent kinetic parameters of pyrolysis are obtained with the activation energy of 66.5kJ/mol and the frequency factor of 3165s-1.A kinetic model is validated for the corn stalk pyrolysis,which can well fit the experimental results.Moreover,some fundamental data of pyrolysis is provided,which is much valuable for the understanding of process mechanism.
文摘The pyrolysis of polyvinyl chloride (PVC) w as examined with a thermal gravimetric analyzer (TGA).The experiments were done over the temperature range of room temperature to 1?000?℃ at three heating r ates of 10, 20 and 50?℃/min under nitrogen atmosphere. The results indicate t hat the entire process of PVC pyrolysis consists of three distinct stages. In t his paper the pyrolysis of PVC was modeled by three independent reactions. The corresponding parameters such as activation energy, pre-exponential factor, and reaction order were determined. The kinetic model, composed of three independe nt and consecutive reactions, gives good agreement with the experimental results .
