TED-AJ03-225 HYDROGEN-RICH BIOMASS GASIFICATION BY USING SELF HEAT-RECIRCULATION TECHNIQUE
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概要
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Biomass is one of the most promising energy resources because it is renewable and carbon-neutral. Hydrogen produced from biomass can be used for the energy source of clean and high efficiency plants like PEFCs. To produce hydrogen-rich gas from biomass requires large amount of supply of steam for steam reforming reaction. In addition heat value of biomass is relatively low. Therefore, it becomes difficult to raise the temperature of a furnace. These technical difficulties may be overcome by applying a self heat-recirculation technique. Its basic idea is to use the waste energy from furnace to preheat the input steam and oxygen. It is to create surprisingly high temperature field only in the furnace with low oxygen ratio. Highly efficient hydrogen-rich gasification will be achieved by using this technique. Use of the waste heat, vapor, and biomass from other facilities may also be included in this gasification process. [figure] In this study, we investigated fundamental biomass gasification characteristics when the self heat-recirculation technique is applied. In the gasification experiment, cellulose is used since it is the major content in the real biomass. Also a reaction analysis that uses the experimental data has been carried out to predict the gasification characteristics at various situations. The gasification experiment has been carried out by using a drop-tube furnace, and the effect of the major gasification parameters, such as, oxygen ratio and water supply rate, have been investigated. The results are compared with unsteady, homogeneous gas phase reaction analysis results. These results suggest that the maximum yield of hydrogen production from cellulose with self-heat recirculation is 8.5 [mol/mol C_6H_<10>O_5] at the oxygen ratio of 0.275. And the conversion efficiency from the cellulose to hydrogen reaches to about 87%. [figure]
- 一般社団法人日本機械学会の論文
著者
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FUSHINOBU Kazuyoshi
Department of Mechanical and Control Engineering, Tokyo Institute of Technology
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OKAZAKI Ken
Department of Mechanical and Control Engineering, Tokyo Institute of Technology
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Okazaki Ken
Department Of Innovative Medical Technology Graduate School Of Medical Sciences Kyushu University
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Nozaki Tomohiro
Department Of Mechanical And Control Engineering Tokyo Institute Of Technology
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Nozaki Tomohiro
Department Of Applied Physics Graduate School Of Engineering Tohoku University
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OHSAKI Koujirou
Department of Mechanical and Control Engineering, Tokyo Institute of Technology
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KANEUCHI Ken
Department of Mechanical and Control Engineering, Tokyo Institute of Technology
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Fushinobu Kazuyoshi
Department Of Mechanical And Control Engineering Tokyo Institute Of Technology
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Kaneuchi Ken
Department Of Mechanical And Control Engineering Tokyo Institute Of Technology
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Ohsaki Koujirou
Department Of Mechanical And Control Engineering Tokyo Institute Of Technology
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Okazaki Ken
Department Of Energy Engineering Toyohashi University Of Technology
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