The study of co-combustion characteristics of coal and duckweed by single particle and TGA methods

• Published in: Powder technology Vol. 421; p. 118410
• Main Authors: Cao, Jun, Zhang, Rui, Shi, Bingquan, Shi, Mingzhe, Zhang, Lijuan, Liu, Dong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2023
• Subjects: Ash; Char; Co-combustion; Duckweed; Single particle; TGA; Co-combustion; Duckweed; Char; Single particle; Ash; TGA
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2023.118410

Co-combustion of coal and biomass is a feasible technology to reduce CO2 emissions and coal consumption. In this paper, the co-combustion characteristics of coal and three kinds of duckweed (Lemna minor, Wolffia, Spirodela) were studied by a single particle combustion method and thermogravimetric analysis (TGA) method in air. The effects of blending ratio of the duckweed and fuel properties on the ignition delay time, burnout time and flame temperature were studied. The ignition delay time, burnout time and flame temperature all decrease as the blending ratio of duckweed increases. The different volatile content and composition of duckweed will affect the temperature distribution and combustion rate in the combustion stage. Compared with the ash of coal, the ash of duckweed can promote the combustion of coal. During the combustion of blended fuels with volatile removed, different contents of ash have different effects on char combustion, such as combustion temperature range, combustion rate, and temperature at peak combustion rate. [Display omitted] •The flame brightness and temperature were related to the blended ratio.•TGA combustion characteristics of duckweeds were affected by fuel properties.•The char combustion were affected by ash of duckweeds.