The 85th Hiroshima University Biomass Evening Seminar
(The 69th Hiroshima University ACE Seminar)was held
Date & Time: Mon.15 Jun., 2020 16:20-17:50
Place: Engineering 110 Lecture Room, Higashi-Hiroshima Campus, Hiroshima University
<Program>
Commentary: Yukihiko MATSUMURA
Professor, Graduate School of Advanced Science and Engineering, Hiroshima University
Lecture: Satoshi KATAYAMA
M1 student, Graduate School of Advanced Science and Engineering, Hiroshima University
“Carboxylic Acid Production by Hydrothermal Treatment of Glucose”
It is essential to obtain oil alternative fuels from biomass for the realization of a sustainable society. It is expected that high quality oil can be obtained by using microorganisms. It is possible that carboxylic acid can be produced relatively easily by using biomass technology as one of the substrates that microorganisms are able to utilize. In this study, we conducted a hydrothermal treatment using glucose as a model compound of biomass and confirmed the production characteristics of carboxylic acid.
Lecture: Yoshiyasu ITO
M1 student, Graduate School of Advanced Science and Engineering, Hiroshima University
“Trial on suppression of char generation in supercritical water gasification using high concentration biomass model compounds”
In the supercritical water gasification, there is a problem that substances such as char and tar are generated with gasification and block the reactor, and it is required to study the suppression of these generations. In this study, we conducted supercritical water gasification of model compounds of lignocellulosic biomass. A mixture of glucose, xylose and guaiacol having a concentration of 2.5 wt% to 7.5 wt% was used as a raw material, and each of solid, liquid and gas products obtained by gasification was analyzed.
Lecture: Hiroshi YOSHIOKA
M2 student, Graduate School of Advanced Science and Engineering, Hiroshima University
「Research on pretreatment of bamboo」
Today, global warming caused by fossil fuel is a problem all over the world. Therefore, biomass is attracting attention. Bamboo is attracting even in its biomass. Bamboo is abundant in Japan. And bamboo’s growth is so fast. So if it can be used as biomass, it has the potential to be a great energy source. However, there is a problem when bamboo is burned as biomass. That is generating clinker. Clinker is generated when potassium of bamboo is burned. This clinker stick boiler’s wall, and cause corrosion of boiler. So, we need to remove potassium of bamboo for using as biomass resources. I thought supercritical methanol is effectiveness for pretreatment of bamboo. Because, I thought bamboo’s potassium is eluted by supercritical methanol. The experiments are carried out using supercritical methanol in this pretreatment for the first time. For that reason, I investigated the behavior of bamboo’s potassium by using supercritical methanol. I treated bamboo with methanol and then studied the proportions of inorganic and organic material. Finally, I understood effect of methanol treatment.
Lecture: Yuta HIROSE
M2 student, Graduate School of Advanced Science and Engineering, Hiroshima University
“Cleaning of exhaust gas from pellet stove“
Pellet stove have some problems to use instead of them. For example, the exhaust gas from pellet stove contains much soot, CO2, CO and some gas which harmful for human health. So it is difficult to use in residential area. Therefore, it is important to remove these things from exhaust gas from pellet stove. In this research, we spray the water to the exhaust gas from pellet stove which contain soot to remove the soot. Heating power of pellet stove which is used in this research can be changed in 5 levels. This experiment was conducted in heating power 1, 3, 5 with spray or no spray. The results of this study, the soot from pellet stove was reduced 70 ％ in heating power 3. Furthermore, the soot from pellet stove was reduced 91 ％ in heating power 5.
Chair: Yukihiko MATSUMURA
Professor, Graduate School of Advanced Science and Engineering, Hiroshima University