Creation of national reference data for calculation of biochar carbon dioxide sequestration

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K06168
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 40020:Wood science-related
• Research Institution: Akita Prefectural University
• Principal Investigator: KURIMOTO YASUJI 秋田県立大学, 木材高度加工研究所, 教授 (60279510)
• Co-Investigator(Kenkyū-buntansha): 渋谷 栄 秋田県立大学, 木材高度加工研究所, 准教授 (50404851)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: バイオ炭 / 二酸化炭素除去 / 炭素クレジット / 工業分析 / 固定炭素 / 揮発分

Outline of Final Research Achievements

The formula for calculating the carbon sequestration effect of biochar is described in an improved report by the Intergovernmental Panel on Climate Change (IPCC), and a methodology for "biochar application to agricultural land (AG-004)" has been developed under the J-Credit System. Currently in Japan, the default values of biochar to be applied are used as parameters for calculating the carbon sequestration. However, since Japan has traditionally used proximate analytical values measured in accordance with JIS M 8812 to evaluate charcoal quality, we examined a conversion method to estimate carbon storage in compliance with international standards using measurement results obtained by the JIS method.

Free Research Field

木質科学

Academic Significance and Societal Importance of the Research Achievements

バイオ炭の工業分析値を用いて炭化温度を推定する手法を明らかにした。また、IPCCのパラメータとなるバイオ炭の有機炭素（Fc）と100年後に残存する炭素率（Fperm）との関係が明らかとなり、最終的に工業分析値から炭素貯留量を見積ることができた。バイオ炭を用いた炭素貯留に関して、その品質評価の一手法に工業分析法を活用できることは、国内分析の信頼性や費用の面からも重要であると考える。