成果報告書詳細
管理番号20120000000176
タイトル*平成23年度中間年報 バイオマスエネルギー技術研究開発 戦略的次世代バイオマスエネルギー利用技術開発事業 (次世代技術開発) 先進的トレファクション技術による高密度・高炭化率固形燃料の研究開発
公開日2015/12/19
報告書年度2011 - 2011
委託先名学校法人近畿大学 中外エンジニアリング株式会社
プロジェクト番号P10010
部署名新エネルギー部
和文要約
英文要約Title: Development of High Density, High Carbonization Ratio Solid Fuel Using Advanced Torrefaction Technology

 Poor cost competitiveness has been the bottleneck for the successful introduction and dissemination of biofuels compared to fossil fuels. A long-term perspective to further improve the energy conversion efficiency of biomass is needed to develop next-generation biofuel production technologies and create a large ripple effect in promoting the use of biomass as biofuel. This research will establish that through semi-carbonization, the degree of carbonization of high carbon density bio-coke is almost 100% that of coal coke. To overcome the various challenges in the manufacturing technology for next-generation solid biofuels, particularly in creating high density and high hardness level solid carbon fuels, a breakthrough in research and development is required.
 Physical properties at high temperature of various material of bio-coke were studied, and its ultimate strength was estimated by a compression test at high temperature 973K by Kinki university new proposal method (developed H19NEDO matching fund). The compressive strength at 973K atmosphere was measured with the compression testing machine and electric heating furnace. This study adopted the temperature of 973K as the trigger point of compression test in high temperature atmosphere. From those results, the relations between the degree of reaction of bio-coke and ultimate strength could be approximated by a linear function. This study could take out degree of reaction for formation conditions under ultimate compressive strength. A dust chamber of 150 cubic meters is designed for combustion test as bed coal coke for melting furnace application.
 In the conventional manufacturing process of bio-coke, the reaction and the density of the bio-coke formed are not uniform for large size bio-coke production because the pressure at the bottom end is lower than that at the upper end wherein the pressure is being applied from. In order to get over this problem, a new equipment that presses biomass from both ends was developed. In this fiscal year, this new equipment was designed, manufactured, installed, and is now in operation. The equipment is composed of a reaction vessel, hydraulic, heating, and cooling mechanisms, a frame structure, and a controller. After test runs with green tea, optimum temperature conditions were also evaluated for bio-coke fabrication using wood chips. The uniformity in the density of the bio-cokes improved with both ends now being dense in contrast to those made through the conventional way wherein there is a gradual decrease in density with increase in distance from top.
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