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D. Le Duc†*, L. Nguyen Huu†, N. Nguyen Hong‡, E.Ohno††, T.Kozaki††, & H.Ishii††

†Hanoi University of Science and Technology 1 Dai Co Viet Road, Hanoi, Vietnam

‡University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Hanoi, Vietnam

††IHI Corporation 1-1 Toyosu 3-chome, Koto-Ku, Tokyo 135-8710, Japan

*Corresponding Author Email: dung.leduc@hust.edu.vn

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

This work focused on investigating the influence of the characteristics and size of the particle on combustion characteristics of char of the coniferous tree (beefwood) and broadleaf tree (beech) that are abundantly available in Vietnam during a low-oxygen combustion condition under different reacting temperatures (800 °C and 1000 °C). Results showed that reaction temperature plays a significant role in the rate of char oxidation. In the case of higher temperature, the rate of char oxidation is significantly shorter than that of lower temperature. The effect of particle sizes on oxidation is not as large as that of temperatures. In general, the rate of oxidation and the complete time of that decrease with increase in particle size. The characteristics of biomass strongly effect on the rate of char oxidation. In all experiments, the conversion rate of char oxidation of the inside part of the beefwood is higher than that of beefwood bark. Char oxidation rate of beech bark is higher than or nearly equal to that of the inside part of the beech. There is no significant difference in the rate of char oxidation between the inside part of the beefwood and beech wood bark. However, all kinds of biomass in this study have a faster rate of oxidation than that of coal. Therefore, these works can support the design of combustion reactors in a commercial plant.