MMIJ Annual Meeting 2016

Presentation information

一般講演

岩盤力学・開発機械

Mon. Mar 28, 2016 11:00 AM - 5:00 PM 第5会場 (東京大学)

司会:福田大祐(北海道大学), 坂口清敏(東北大学), 伊藤高敏(東北大学), 藤井義明(北海道大学)

2:00 PM - 2:15 PM

[1507] Induced oxidation effects on physical and mechanical properties of lignite

AKMBadraulAlam1, 荒牧憲隆1, 玉村修司1, 藤井義明2, 金子勝比古1 (1..公益財団法人北海道科学技術総合振興センター, 2.北海道大学大学院)

司会:坂口清敏(東北大学)

Keywords:SCG method, Induced oxidation, Lignite, physical properties, mechanical properties

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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