open access

https://hdl.handle.net/2115/64887

褐炭の物理・力学特性に及ぼす酸化の影響

英語

mechanical properties

2016-03-28

The Mining and Materials Processing Institute of Japan

Spring Meeting of MMIJ

2016

1507

Spring Meeting of MMIJ 2016, Mar. 28-30 2016, Tokyo, Japan（資源・素材学会平成28年度春季大会、2016年3月28日（月）～30日（水）、東京大学本郷キャンパス、東京）

To produce Low Molecular Weight Organic Compound (LMWOC), the H2O2 solution is being considered for bio-methane production in the Subsurface Cultivation and Gasification (SCG) method. Core samples of about 30 mm in diameter and 60 mm in height were prepared from the lignite blocks collected from stream side in Horonobe, Hokkaido were submerged into 1% H2O2 solution. The changes in physical and mechanical properties were observed by measuring the size, weight, ultrasonic velocity and uniaxial compression test. The swelling, leaching and breakage processes were in action due to reaction of lignite with the H2O2 solution. The density slightly increased and then decreased, and the ultrasonic velocity decreased with reaction time. The mechanism of the phenomenon was mainly due to change in mineral grains forming LMWOC and of microcracks. Lignite became relatively weaker and less stiff after reaction.

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