| Gas-solid reaction kinetic measurement is fundamental in the fields of chemistry, chemical engineering, energy, material and environment, etc. The micro fluidized bed reaction analyzer (MFBRA) was developed by IPE, CAS, which allows reactant feeding at a specified temperature and enhances heat and mass transfer inside the reactor. By using a micro fluidized bed reactor it was expected to enable 1) on-line pulse feeding of particle reactants, 2) effective suppression of the external gas diffusion in the reactor, and 3) minimization in-particle diffusion through adaptation to fine solid reactants. Hence, the MFBRA provides a measurement of the reaction rates at arbitrary temperatures. Furthermore, the MFBRA can provide possibly some information about the nature of the reaction by combining with mass spectrometer or electrochemical sensor to analyze gaseous products.Through comparing the kinetics data from TGA and MFBRA, the primary applications of MFBRA were exhibited in this thesis. The main conclusions as follows:The combustion of graphite at a selected temperature was investigated using MFBRA with elimination of diffusional inhibition. The activation energy and pre-exponential factor were about 160-175 kJ/mol and 106 s, respectively. While, the reaction was controlled by the nucleation and growth model with equation as G(x)=-ln(1-x). The kinetics of graphite combustion was also calculated using non-isothermal and isothermal data on thermogravimetric analyzer and MFBRA. The kinetics data, which derived from two instruments with isothermal and non-isothermal methods, were consistent with each other. These results justified that micro fluidized bed reactor in possession of isothermal and differential characteristics. Compared with the non-isothermal method, the results of isothermal method exhibited high accuracy and the calculation method is simpler because that the isothermal method could separate the rate constant and reaction model.The application to biomass pyrolysis resulted in a time of about 10 s to finish reaction at 800℃which was much shorter than the literature values. The detected evolving sequences of different gas species and the deduced kinetic parameters demonstrated further that the reactions between/among the formed different gas species prevail to certain degree during pyrolysis and there were different pathways for forming different gas species. The activation energy and pre-exponential factor derived by viewing the pyrolysis gas as a single product were11.77 kJ/moland 1.45 s-1, much lower than the literature values measured in thermogravimetric analyzer. These results also show in fact the superiority and application potential of MFBRA for fast and complicated reactions. Application of the MFBRA to the decomposition of CaCO)3 powder resulted an apparent activation energy of 142.73 kJ/mol and a pre-exponential factor of 399777s-1. This activation energy was much lower than our TGA-measured value of 184.30 kJ/mol and in literature-reported range of 120-280 kJ/mol. The measurement resulted also in a kinetic-model function of f(x)=(1-x)0.86 with a correlation linearity above 0.99. These results also show that the MFBRA could be applied in in-situ reaction.
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