Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China.
Faculty of Life Science & Food Engineering, Huaiyin Institute of Technology, Huaian, China.
Bioresour Technol. 2016 Oct;218:1157-62. doi: 10.1016/j.biortech.2016.07.086. Epub 2016 Jul 21.
Wet torrefaction of duckweed was carried out in the temperature range of 130-250°C to evaluate the effects on physicochemical properties and combustion behavior. The physicochemical properties of duckweed samples were investigated by ultimate analysis, proximate analysis, FTIR, XRD and SEM techniques. It was found that wet torrefaction improved the fuel characteristics of duckweed samples resulting from the increase in fixed carbon content, HHVs and the decrease in nitrogen and sulfur content and atomic ratios of O/C and H/C. It can be seen from the results of FTIR, XRD and SEM analyses that the dehydration, decarboxylation, solid-solid conversion, and condensation polymerization reactions were underwent during wet torrefaction. In addition, the results of thermogravimetric analysis (TGA) in air indicated that wet torrefaction resulted in significant changes on combustion behavior and combustion kinetics parameters. Duckweed samples after wet torrefaction behaved more char-like and gave better combustion characteristics than raw sample.
浮萍的湿式热解在 130-250°C 的温度范围内进行，以评估对物理化学性质和燃烧行为的影响。通过元素分析、工业分析、FTIR、XRD 和 SEM 技术研究了浮萍样品的物理化学性质。结果表明，湿式热解提高了浮萍样品的燃料特性，这是由于固定碳含量增加、HHV 增加以及氮和硫含量以及 O/C 和 H/C 原子比降低所致。从 FTIR、XRD 和 SEM 分析的结果可以看出，在湿式热解过程中发生了脱水、脱羧、固-固转化和缩合聚合反应。此外，空气热重分析（TGA）的结果表明，湿式热解对燃烧行为和燃烧动力学参数产生了显著影响。湿式热解后的浮萍样品表现出更类似于焦炭的行为，并具有更好的燃烧特性，优于原始样品。
