The 95th Hiroshima University Biomass Evening Seminar (The85th Hiroshima University ACE Seminar) was held by Hiroshima University

Date & Time: Thu. 29 July., 2021   16:20-17:50
Place: Engineering 110 Lecture Room, Higashi-Hiroshima Campus, Hiroshima University

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

Lecture: Kosuke HIRAMATSU
 M1 student, Graduate School of Advanced Science and Engineering, Hiroshima University
“Effect of addition timing of radical scavengers in supercritical water gasification”

Supercritical water gasification (SCWG) is expected to be the next generation technology to generate energy from biomass. However Char, a solid product formed by side reactions, can clog the reactor during long-term operation, cling to and deactivate the catalyst, and even reduce the carbon gasification yield. Recent studies have shown that the addition of acetic acid and formic acid as radical scavengers can inhibit the formation of char in SCWG of guaiacol as a . In this study, SCWG was carried out using guaiacol as a raw material, and radical scavengers were added during the heating of the raw material. The effect of the addition timing of radical scavengers and varying the concentration of radical scavengers on the product were evaluated.

Lecture: Mitsuru AOYAGI
 Assoc.Professor, Life Environment department Science club of Living resources, Prefectural University of Hiroshima
“Preparation of sustainable macromolecular materials from unused plant biomass by chemical modifications”

Sustainable macromolecular materials with hydrophilicity or heat resistance were derived from plant biomass such as weeds along the roadsides or lignin polymers in unutilized wood through several chemical processes. Several properties of plants such as strength or flexibility are produced by plant cell walls, which are composed of complicated semi-IPN composites with cellulose, hemicellulose and lignin. Investigation on characterization and properties of these macromolecular composites were carried out.