Thu., Feb 26, 2026 16:20-17:50
Onsite & Online Hybrid

Engineering 109 Lecture Room, Higashi-Hiroshima Campus, Hiroshima University
　※Please note that the venue is different from the usual one.

If you are online, you need to apply.

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

Lecture: ROBBANI, Muhammad Haqqiyuddin
D1, Graduate School of Advanced Science and Engineering, Hiroshima University
“Effect of Feedstock Concentration on Hydrochar Yield for Hydrothermal Carbonization of Starch”

Food waste is one of the biggest global issues due to its properties, such as its high moisture content and perishability. Application of hydrothermal carbonization can be a promising solution that does not require drying or additional chemicals, making it highly suitable for processing high-moisture feedstock. While numerous studies have demonstrated the ability of hydrothermal carbonization to produce hydrochar from food waste, the impact of feedstock  concentration — the primary carbohydrate — on reaction behavior during hydrothermal carbonization remains understudied and disputed, especially at higher concentrations. This study aims to investigate how feedstock concentration affects the behavior of the hydrothermal carbonization reaction.

Lecture: Raito ARAKAWA
M1, Graduate School of Advanced Science and Engineering, Hiroshima University
“Preparation of Ru/Watermelon Rind Biochar Catalyst for Xylitol from Xylose via Hydrogenation”

Watermelon rind (WR), making up about one-third of the fruit’s mass, is often discarded, causing environmental concerns. This study explores hydrothermal carbonization (HTC) as a method to convert WR into hydrochar for catalyst support. WR was treated at 200 ℃ for 2 hours, with and without 0.05 M citric acid. Citric acid slightly reduced hydrochar yield but improved surface functionality, aiding metal dispersion. The hydrochars were analyzed by CHNS, TGA, XRD, FTIR, and BET. Ruthenium-loaded hydrochar (Ru/WRC) showed potential as a hydrogenation catalyst due to its oxygen-rich surface, supporting sustainable waste valorization.

Lecture: MENGLI ZHANG
Assistant Professor, Graduate School of Advanced Science and Engineering, Hiroshima University
“Parametric Study on the Fabrication of CNT Paper by Vacuum Filtration for Gas Sensor Applications”

The fabrication of uniform and controllable carbon nanotube (CNT) papers is essential for their integration into next-generation gas sensors. In this study, CNT papers were prepared by vacuum filtration under systematically varied solution concentrations and volumes. The resulting papers were evaluated in terms of filtration behavior, thickness, and mass uniformity. Empirical relationships were derived to predict fabrication outcomes from input parameters, enabling reproducible control over CNT paper morphology. Future work will focus on microstructural characterization and preliminary sensing tests.

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

Please post the following 5 items (1-4 are required) in the email, write "I would like to participate in the evening seminar" in the subject line, and send it to
bprc * hiroshima-u.ac.jp. (Please replace * with @)

1.Participation Seminar：Thu., Feb. 26, 2026. 126th Hiroshima University Biomass Evening Seminar
2.Name：
3.e-mail address：
4.Participation form：□Online　□Face-to-face
5.message：