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Hydrogen Rich Syngas Production from Biomass Gasification in a Fluidized Bed

Author: SunYang
Tutor: YangTianHua
School: Shenyang Institute of Aeronautical College
Course: Safety Technology and Engineering
Keywords: Biomass Porous bed material Fluidized bed Gasification Hydrogen-rich gas Grey Theory
CLC: TK6
Type: Master's thesis
Year: 2008
Downloads: 115
Quote: 0
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Abstract


With the intensification of the problem of environmental pollution caused by the depletion of fossil energy and energy use, development and utilization of clean and renewable biomass by widespread concern. Biomass gasification hydrogen-rich gas technology is very promising biomass utilization technologies. Based on biomass gasification system of hydrogen-rich gas development overview and a variety of process application status review of the porous bed material biomass fluidized bed gasification of hydrogen-rich gas process, that the use of a porous bed material on biomass gasification system to a hydrogen-rich gas is one worth exploring ways. Porous bed material biomass pyrolysis is the main reaction occurs in the porous bed material biomass gasification process, by its characteristics, and provide guidance for the the subsequent gasification process research. First thermogravimetric differential thermal analyzer heating rate, particle size of materials, biomass types as well as the porous bed material impact on the characteristics of biomass pyrolysis. The results show that: the different types of biomass pyrolysis characteristics; small particle size, fast warming rate and porous bed material exists in the case of biomass pyrolysis carried. Second, the research atmosphere furnace tube bed material impact on biomass pyrolysis gas production, tar yields, and pyrolysis producing hydrogen-rich gas. Experimental results show that: the porous bed material mixed with the biomass pyrolysis conducive tar cracking, increase the rate of gas production; study found that biomass porous bed material mixing ratio of 10:2 when pyrolysis largest amount of hydrogen produced. And established on the basis of the experimental results of the pyrolysis kinetic model of the pyrolysis and pyrolysis hydrogen production model. Porous media using homemade small fluidized bed gasification production of hydrogen-rich gas for bed material rice husk, straw and compression molding biomass materials. Porous bed material under study analyzed various factors (such as temperature, type of gasifying agent, the gasification agent flow, different types of porous bed material, and different proportions of bed material) hydrogen gas-rich biomass gasification system. Research shows that: the temperature, the type of gasifying agent on biomass gasification system to take hydrogen-rich gas great influence; gasification agent flow of biomass gasification hydrogen-rich gas there is an optimal range; bed material types and different proportions of gas technology has a greater impact. Compared with the ordinary bed material, porous bed material has a strong role in promoting the gasification of biomass, especially for biomass gasification hydrogen production and tar cracking. Gray theory the influencing factors of biomass gasification hydrogen production associated analysis to determine the relationship of the influencing factors of the primary and secondary, in order to discuss the various gasification conditions on biomass gasification hydrogen production. According to the experimental results to establish the gray theory model in gasification hydrogen production.

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