| The resources and the environment are the basic conditions for human survival, multiplication and development. At present, shortage of resources, environmental pollution and ecological deterioration have become important strategic task in many countries. Therefore, it is critical to discover and exploit renewable, recyclable and effective new energy and chemical raw materials. Biomass energy, as a kind of renewable clean energy source, attracts more and more attention of governments and research institutions. Regarding China, accelerating the development of biomass energy, new energy and chemical industries not only can alleviate the energy crisis and optimize the ecological environment, but also can be beneficial to"Three Agricultural Issues"and promoting the harmonious economic and social development. The pyrolysis of biomass is a leading technology for Biomass energy research and development in the world. An experimental research was carried out regarding biomass as raw materials.Firstly, the relative questions of pyrolysis of biomass were summarized. Secondly, the optimal design and thermal calculation about the transporting, heating, condensing and other parts of experimental equipments were analyzed, which provided reliable theoretical foundations for making testing model. Thirdly, some rules were obtained from debugging the experimental device. For a better understanding of the factors of reaction temperature, settle time and so on which impacted the pyrolyzate, sublanceolata and rice bran were chosen to study carefully under the condition of temperature of 650℃,750℃,850℃,900℃and flow rate being 0.21m3/h and 0.11m3/h of carrier gas. Change rules and influence factors of H2, CH4, CO and other products analyzed by gas Chromatography were obtained from experiments and explained from the angle of the mechanism. From comparative analysis research, the optimum working condition of reactor temperature of 850℃at flow rate of 0.11m3/h for this experimental device was confirmed. According to contrast experiment between solid products and original samples analyzed by Integrated Thermal Gravimetric Analyzer, results showed that solid products weightless loss apparently different from original samples was not obvious, the reasons of which were analyzed. From kinetic analysis on samples by model functions to find out the most probable mechanism, it showed that Jander equation G (α)=[1-(1-α)1/3 ]2 three-dimensional model was qualified to describe the whole reaction course. According to simulating results activation energy E and pre-exponential factor A were gained.
|
PDF Full Text Request