■第35回広島大学バイオマスイブニングセミナーが開催されました

(English announcement can be found in the latter half of this notice.)

 

日時 2015年10月15日(木)16:20~17:50

会場 広島大学東広島キャンパス工学部110講義室

 

プログラム

解説 広島大学大学院工学研究院  教授 松村幸彦

講演 広島大学大学院工学研究院 特任助教 Obie FAROBIE

  「超臨界MTBおよび酢酸メチルを用いたバイオディーゼル生産の比較研究」

超臨界MTBEおよび酢酸メチルを用いたバイオディーゼル生産の比較研究は行われていません。そこで本研究では、超臨界条件下でのバイオディーゼル生産におけるMTBEと酢酸メチルとでの反応挙動の違いを明らかにすることを目的とした。連続式反応器を用いた実験は、圧力20MPa、反応温度300-400℃、反応時間5-30 minの条件下で行い、オイルと反応物質のモル比は140とした。この結果、同じ反応条件下において超臨界MTBEが超臨界酢酸メチルより高いバイオディーゼルの収率を得ることが示された。また、超臨界MTBEおよび酢酸メチルそれぞれのバイオディーゼル生産における反応速度の比較も行った。

講演 広島大学大学院工学研究科 M2 高瀬 裕介

「EFBの水熱前処理における粒径・濃度・処理時間の影響」

パームオイルの製造過程で生じる残渣EFBEmpty Fruit Bunches : 空果房)からエタノールを生産することができる。その際、水熱前処理を用いることで糖化収率の向上を狙うことができるが、過分解によって発酵阻害物質が生成するという問題がある。しかし、その粒径・濃度・保持時間が糖化収率に及ぼす影響は明確になっていない。したがって、本研究はEFBの水熱前処理における粒径・濃度・保持時間の影響を調査することを目的とした。

講演 広島大学大学院工学研究科 M2明山佳樹

「麦焼酎残渣の超臨界水ガス化」

含水性バイオマスを効率よく利用できる技術として超臨界水ガス化が挙げられる。食品廃棄物の一つとして、灰分が少ない焼酎残渣が挙げられ、その超臨界水ガス化特性を知ることは重要である。焼酎残渣を試料とした研究も行われているが、その分解速度について考察した研究は報告されていない。本研究では、試料に麦焼酎残渣を選択し、焼酎残渣を超臨界水ガス化し、その分解・ガス化速度を実験的に求め、そのガス化特性を知ることを目的とする。

司会 広島大学大学院工学研究院   特任助教 Thachanan SAMANMULYA

The 35th Hiroshima University Biomass Evening Seminar was held.

Date & Time: Thu.15  Oct., 2015   16:20-17:50

Place: Engineering 110 Lecture Room, Higashi-Hiroshima Campus, Hiroshima University

 

<Program>

Commentary: Yukihiko MATSUMURA

Professor, Institute of Engineering, Hiroshima University

Lecture: Obie FAROBIE

        Assistant Professor, Institute of Engineering, Hiroshima University

A Comparative Study of Biodiesel Production Using Supercritical MTBE and Methyl Acetate

Depletion of fossil fuel and environmental pollution problems have attracted a tremendous attention to search an alternative diesel fuel. Biodiesel which is a renewable fuel has been utilized to substitute the petroleum diesel fuel. Currently, biodiesel is mainly produced by homogeneous alkali-catalyzed transesterification. However, this process has numerous constrains such as sensitive to the presence of water, requirement of low free fatty acid (FFA), and the generation of undesirable products. In addition, the overproduction of by-product glycerol is unavoidable since it causes the price of glycerol to fall dramatically. To circumvent this problem, biodiesel production using supercritical MTBE and methyl acetate was conducted. By using this route, GTBE and triacetin which is a higher added-value than glycerol was obtained. However, a comparative study of biodiesel production using supercritical MTBE and methyl acetate has not been made. Therefore, the aim of this study is to elucidate the difference in the reaction behavior of MTBE and methyl acetate in the production of biodiesel under supercritical condition. A continuous reactor was employed, and experiments were conducted at various reaction temperatures (300–400 °C) and reaction times (5–30 min) and at a fixed pressure of 20 MPa and an oil-to-reactant molar ratio of 1:40. The results showed that under the same reaction conditions, supercritical MTBE provided higher biodiesel yield than supercritical methyl acetate. The reaction kinetics of biodiesel production for supercritical MTBE and methyl acetate was also compared.

Lecture: Yusuke TAKASE
M2  Student, Graduate School of Engineering, Hiroshima University

“Effect of Particle Size, Concentration and Holding Time on Hydrothermal Pretreatment of EFB”

EFB (Empty fruit bunches) is the residue produced in the production of palm oil.  Ethanol production is one of the effective utilization of it.  By hydrothermal pretreatment, saccharification efficiency is improved, but fermentation inhibitors are produced during hydrothermal conditions.  Although the glucose yield is important, the effect of feedstock particle size, concentration and holding time is not elucidated.  The objective of this study is to gain the knowledge on the effect of particle size, concentration and holding time on hydrothermal pretreatment of EFB.

LectureYoshiki AKEYAMA
M2 Student, Graduate School of Engineering, Hiroshima University

Supercritical water gasification of barley shochu residue (Japanese Distilled Liquor)

For effective utilization of wet biomass, supercritical water gasification (SCWG) has attracted attention. It is significant to determine the gasification characteristic of shochu (Japanese Distilled Liquor) residue which is one of the food wastes. Although the study was conducted using shochu residue as feedstock, it has not been clarified to confirm its gasification rate. The purpose of this study was to obtain knowledge the behavior of shochu residue in supercritical water. A continuous reactor was employed to determine the gasification characteristics of shochu residue in supercritical water.

Chair: Thachanan SAMANMULYA

      Assistant Professor, Institute of Engineering, Hiroshima University