The 80th Hiroshima University Biomass Evening Seminar

(The 60th Hiroshima University ACE Seminar)was held.

 

Date & Time: Mon .16 Dec., 2019   16:20-17:50

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

 

<Program>

 

Commentary: Yukihiko MATSUMURA

Professor, Graduate School of Engineering, Hiroshima University

 

 

Lecture: Kanta OGAWA

M1 Student, Graduate School of Engineering, Hiroshima University

 

“5-Hydroxymethylfulfural Production in Hot Compressed Water Using Magnetic Catalyst”

Material production from biomass is important, and 5-hydroxymethylfulfural (5-HMF) is one of the important platform chemicals. It is easily produced from sugars in hot compressed water, but recovery of catalyst has been a challenge. To improve the catalyst collection, magnetic catalyst is attractive, but no one has studied its effect. In this study, we employed magnetic carbon nanocatalyst, and succeeded to produce 5-HMF in hot compressed water.

 

 

Lecture: Hiroshi YOSHIOKA

M1 Student, Graduate School of Engineering, Hiroshima University

 

“Life cycle energy and CO2 of microalgae biodiesel production”

Microalgae is expected to be a promising oil producing biomass that can be used for biodiesel production. However, there is discussion on whether it is actually feasible. This study aims to compare three different biodiesel production methods, catalytic, in-situ, and supercritical, on the net energy ratio and CO2 emission.

 

 

Lecture: Yoshiki FUJIWARA

M2 Student, Graduate School of Engineering, Hiroshima University

 

“Precipitate Recovery of Calcium Phosphate from Hydrothermally Treated Adenosine Triphosphate”

Adenosine triphosphate (ATP) was treated at 350℃, 25 MPa for residence time of 20 s in the reactor made of SS316 steel tubing (i.d. 2.17 mm, o.d. 3.18 mm, and length 0.27 m). Calcium phosphate was recovered from ATP as precipitate by adding calcium nitrate. Trial to recover the precipitate at the exit of the reactor using sintered stainless filter was not successful. Therefore, in this study, the precipitate position of generated precipitate was investigated.

 

 

Lecture: Yuta HIROSE

M1 Student, Graduate School of Engineering, Hiroshima University

 

“Feasibility of conducting a 2-Stage Subcritical hydrothermal treatment of microalgae biomass”

Hydrothermal carbonization (HTC) allows carbonization of wet biomass to effectively utilize it. There is no need of drying process, so we can save energy to dry wet biomass. One of the promising feedstock is microalgae. In spite of large number of research about HTC of microalgae, they are all discussing energy of end products from 1-stage subcritical hydrothermal treatment. 2-stage subcritical hydrothermal treatment of microalgae should allow production of value added product in addition to energy. In this study, we investigated the effectiveness of 2-Stage treatment for hydrothermal carbonization.

 

 

Chair: Yukihiko MATSUMURA

Professor, Graduate School of Engineering, Hiroshima University