Fuel production from bamboo biomass particles with high calorific value comparable to coal, accompanied by the creation of high-strength materials

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H03664
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 64050:Sound material-cycle social systems-related
• Research Institution: Yamaguchi University
• Principal Investigator: Tanoue Kenichiro 山口大学, 大学院創成科学研究科, 教授 (70293892)
• Co-Investigator(Kenkyū-buntansha): 合田 公一 山口大学, 大学院創成科学研究科, 教授 (10153743)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 半炭化 / クリンカー / シナジー効果 / バイオマス/廃プラ / バンブーマテリアル

Outline of Final Research Achievements

Optimal conditions for solid fuels obtained from bamboo/waste plastic co-pyrolysis in terms of crushability, HHV and energy yield were TS = 623 K, wp = 10 wt% and HHV > 30 MJ/kg Addition of 1 wt% bamboo powder to PP successfully increased the strain at break. Ash deposition during bamboo biomass combustion was reduced by more than 75% by the addition of MgO. On the other hand, the addition of SiO2 decreased the melting point and increased ash deposition due to the proportion of K2O in the ash. On the other hand, the addition of CaO did not reduce ash deposition due to the formation of CaCO3 and Ca(OH)2, which have lower melting points due to their interaction with char during combustion.

Free Research Field

循環型社会システム関連

Academic Significance and Societal Importance of the Research Achievements

バイオマスや廃プラスチックの燃料生成は，通常，800℃以上の高温操作で行われる．本研究により400℃程度の加熱でしかも石炭に匹敵する高カロリー燃料が生成されることが明らかとなった．また，MgOを1%添加するだけで，灰融点が大幅に上昇することも明らかとなった．このことから，本研究成果は，バイオマスボイラーの2つの大きな課題（１．低カロリー，２．低灰融点）を解決するものであり，また竹のマテリアル利用も鑑みながら，エネルギー資源のない日本においても有用なエネルギー生成法の一つになると考えられる．