The 67th Hiroshima University Biomass Evening Seminar (The 40th Hiroshima University ACE Seminar)

Date & Time: Wed.26 Sep, 2018 16:20-17:50
Place: Engineering 115 Lecture Room, Higashi-Hiroshima Campus, Hiroshima University


Commentary: Yukihiko MATSUMURA
Professor, Graduate School of Engineering, Hiroshima University

Lecture: Yukihiko MATSUMURA
Professor, Graduate School of Engineering, Hiroshima University
Nitrogen behavior in supercritical water gasification of glycine
To reduce global warming problems, using energy from renewable source such as biomass instead of fossil fuel is now being sought. Since protein that contain nitrogen compounds is always found in biomass, in this study, glycine, which is the simplest amino acid, was chosen as representative model protein for investigating the simultaneously recovery of ammonia and gas generation under supercritical water gasification. A tubular flow reactor was employed and glycine was gasified in supercritical temperature (390-450 °C) with fixing pressure at 25 MPa and glycine concentration of 1.0 wt% to observe the effect of residence time (5-60s). The behavior of nitrogen and gas production from glycine during the SCWG process were investigated. According to this experiment, most of nitrogen compounds in glycine are in form of ammonia and methylamine. The mainly gaseous that obtained from glycine decomposition were composed of H2, CO2. Small amount of CH4 was generated at high temperature. 

Lecture: Kenichiro TANOUE
Professor, Department of Mechanical Engineering,Graduate School of Sciences and Engineering for Innovation, Yamaguchi University
Study on characteristics of carbonization during torrefaction in the packed bed of biomass
In this study, we conducted component analysis, measurement of high heating value after torrefaction and measurement of heat and mass transfer during the torrefaction in three types of biomass powder: Bamboo, Douglas fir and Bark. It was found that the high heating value (HHV) of Bamboo had the maximum value when the torrefaction temperature was 623 K. The HHV of Bamboo was larger than that of Douglas fir and Bark. The gas flow rate during torrefaction of Bamboo had a constant value because cellulose decomposition could be occurred partly after exothermic decomposition of Xylan. It was suggested that the torrefaction of Douglas fir and Bark would be controlled by thermal decomposition of Mannan and Lignin, respectively. 

Chair: Yukihiko MATSUMURA
Professor, Graduate School of Engineering, Hiroshima University