Pyrolysis and Char Oxidation of Biomass and Coal Blends: Kinetic Study Using Thermogravimetric Analysis

2018 4th International Conference on Environment and Renewable Energy

生态环境科学;能源学

Tran, Hoang Anh^1 ; Van De Steene, Laurent^1,2,3 ; Le, Duc Dung^4

University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology, Hanoi, Viet Nam^1

CIRAD, UPR BioWooEB, Hanoï, Viet Nam^2

BioWooEB, Univ Montpellier, CIRAD, Montpellier, France^3

Hanoi University of Science and Technology (HUST), Hanoi, Viet Nam^4

关键词: Char oxidation;    Combustion pro-cess;    Environmental issues;    Exothermic oxidation;    Forestry wastes;    Fundamental research;    Pyrolysis process;    Thermochemical transformations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/159/1/012035/pdf
DOI  :  10.1088/1755-1315/159/1/012035

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Vietnam as an agricultural country has a high potential in biomass, especially agricultural and forestry wastes. This resource offers a promising way to develop co - combustion technology of biomass and coal in Vietnam and thus tackle the environmental issues. A fundamental research was established to study combustion of Vietnamese rice straw and coal. Blends was made by mixing manually 50% wt. of rice straw and 50% wt. of coal. Pyrolysis in inert gas, char oxidation in oxidizing gases (10 % O2in N2) and combustion process in oxidizing gases (10 % O2in N2) were implemented. A particular attention was paid to the behaviour of rice straw/coal blends during thermochemical transformation. Concerning pyrolysis process, the char yield of the mixture is equivalent to weighted sum of the char yield of two solid fuels. During the combustion of the blends, we observed a coupling between pyrolysis and char oxidation. The exothermic oxidation reactions could overheat the sample itself and accelerate the pyrolysis and char oxidation kinetics.