Heat and Mass Transfer during Lignocellulosic Biomass Torrefaction: Contributions from the Major Components—Cellulose, Hemicellulose, and Lignin

Ken-ichiro Tanoue; Kentaro Hikasa; Yuuki Hamaoka; Akihiro Yoshinaga; Tatsuo Nishimura; Yoshimitsu Uemura; Akihiro Hideno

LAPSE

Living Archive for Process Systems Engineering

LAPSE:2020.1234

Published Article

LAPSE:2020.1234

Heat and Mass Transfer during Lignocellulosic Biomass Torrefaction: Contributions from the Major Components—Cellulose, Hemicellulose, and Lignin

Ken-ichiro Tanoue, Kentaro Hikasa, Yuuki Hamaoka, Akihiro Yoshinaga, Tatsuo Nishimura, Yoshimitsu Uemura, Akihiro Hideno

December 17, 2020

The torrefaction of three representative types of biomass—bamboo, and Douglas fir and its bark—was carried out in a cylindrical-shaped packed bed reactor under nitrogen flow at 573 K of the reactor wall temperature. As the thermal energy for the torrefaction was supplied from the top and the side of the bed, the propagation of the temperature profile of the bed is a crucial factor for discussing and improving the torrefaction reactor performance. Therefore, the temperature and gas flow rate (vector) profiles throughout the bed were calculated by model simulation so as to scrutinize this point. The measured temperature at a certain representative location (z = 30 mm and r = 38 mm) of the bed was well reproduced by the simulation. The volume faction of the bed at temperatures higher than 500 K at 75 min was 0.89, 0.85, and 0.99 for bamboo, and Douglas fir and its bark, respectively. It was found that the effective thermal conductivity is the determining factor for this difference. The heat of the reactions was found to be insignificant.

Record ID

LAPSE:2020.1234

Keywords

biomass major components, biomass torrefaction, numerical simulation, packed bed reactor, reaction enthalpy

Subject

Modelling and Simulations

Suggested Citation

Tanoue KI, Hikasa K, Hamaoka Y, Yoshinaga A, Nishimura T, Uemura Y, Hideno A. Heat and Mass Transfer during Lignocellulosic Biomass Torrefaction: Contributions from the Major Components—Cellulose, Hemicellulose, and Lignin. (2020). LAPSE:2020.1234

Author Affiliations

Tanoue KI: Department of Mechanical Engineering, School of Sciences and Engineering for Innovation, Yamaguchi University, Tokiwadai 2-16-1, Ube, Yamaguchi 755-8611, Japan
Hikasa K: Department of Mechanical Engineering, School of Sciences and Engineering for Innovation, Yamaguchi University, Tokiwadai 2-16-1, Ube, Yamaguchi 755-8611, Japan
Hamaoka Y: Department of Mechanical Engineering, School of Sciences and Engineering for Innovation, Yamaguchi University, Tokiwadai 2-16-1, Ube, Yamaguchi 755-8611, Japan
Yoshinaga A: Department of Mechanical Engineering, School of Sciences and Engineering for Innovation, Yamaguchi University, Tokiwadai 2-16-1, Ube, Yamaguchi 755-8611, Japan
Nishimura T: Department of Mechanical Engineering, School of Sciences and Engineering for Innovation, Yamaguchi University, Tokiwadai 2-16-1, Ube, Yamaguchi 755-8611, Japan
Uemura Y: NPO Kuramae Bioenergy, Minato-ku, Tokyo 108-0023, Japan; Center for Biofuel and Biochemical Research, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Malaysia
Hideno A: Paper industry innovation center of Ehime University, 127 Mendori-cho, Shkokuchuo 799-0113, Japan

Journal Name

Processes

Volume

8

Issue

8

Article Number

E959

Year

2020

Publication Date

2020-08-09