A comparative study: Physiochemical characterization and kinetic analysis of raw and hydrothermally treated pine sawdust

作者：Xing, Xianjun; Yang, Jing; Zhang, Xuefei; Li, Yongling; Zhang, Xianwen^*

来源：Journal of Renewable and Sustainable Energy, 2018, 10(3): 033101.

DOI：10.1063/1.5018025

• INTEGRAL ISOCONVERSIONAL METHOD
• PELLET THERMAL-DECOMPOSITION
• THERMOGRAVIMETRIC ANALYSIS
• PYROLYSIS CHARACTERISTICS
• COMBUSTION CHARACTERISTICS
• CARBONIZATION HTC
• BIOMASS
• PRODUCTS
• WASTE
• TEMPERATURE

In this work, the physiochemical characteristics of pine sawdust and its two types of hydrochars (PSD-6HTC and PSD-12HTC) were characterized. Thermogravimetric analysis was employed to assess the pyrolysis reactivity and calculate the kinetic parameters. The results showed that hydrochars with a pore structure and microspheres were obtained after hydrothermal treatment, which decreased the volatile matter and sulfur and nitrogen contents of raw pine sawdust but increased the fixed carbon and ash contents. The subsequent pyrolysis process of hydrochars was shortened compared to PSD, and PSD-6HTC presented the highest reactivity. Weight loss curves of three samples shifted to a higher temperature zone with the increase in heating rates. The residual mass percentage of PSD after the pyrolysis process was less than that of hydrochars. Moreover, the trend of activation energy of three samples at various conversion rates was similar; however, the average activation energy of PSD-6HTC was the lowest, which contributed more for use in pyrolysis. Published by AIP Publishing.

• 出版日期2018-5
• 单位合肥工业大学