Centre of Excellence in Disaster Mitigation and Management, Indian Institute of Technology Roorkee, India.
Centre of Excellence in Disaster Mitigation and Management, Indian Institute of Technology Roorkee, India; Chemical Engineering Department, Indian Institute of Technology Roorkee, India.
Int J Biol Macromol. 2023 Jul 1;242(Pt 1):124725. doi: 10.1016/j.ijbiomac.2023.124725. Epub 2023 May 5.
Recent alarming tones regarding the environment and energy crises have resulted in an emergent need for the utilization of bio-based materials. The current study aims to experimentally investigate the thermal kinetics and pyrolysis behavior of lignin extracted from novel barnyard millet husk (L-BMH) and finger millet husk (L-FMH) crop residue. The characterization techniques FTIR, SEM, XRD, and EDX were employed. TGA was performed to assess the thermal, pyrolysis, and kinetic behavior using Friedman kinetic model. The average lignin yield was obtained as 16.25 % (L-FMH) and 21.31 % (L-BMH). The average activation energy (E) was recorded as 179.91-227.67 kJ mol for L-FMH while 158.50-274.46 kJ mol for L-BMH in the conversion range of 0.2-0.8. The higher heating value (HHV) was found to be 19.80 ± 0.09 MJ kg (L-FMH) and 19.65 ± 0.03 MJ kg (L-BMH). The results create a possibility for the valorization of extracted lignin as a potential bio-based flame retardant in polymer composites.
最近，有关环境和能源危机的警报不断，这使得人们迫切需要利用生物基材料。本研究旨在通过实验研究从新型稗草壳（L-BMH）和珍珠粟壳（L-FMH）作物残余物中提取的木质素的热动力学和热解行为。采用傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、X 射线衍射（XRD）和能谱（EDX）等技术对其进行了表征。采用热重分析（TGA）对木质素的热解和动力学行为进行了评估，采用 Friedman 动力学模型进行了分析。从 L-FMH 和 L-BMH 中分别获得了 16.25%和 21.31%的平均木质素产率。L-FMH 的平均活化能（E）为 179.91-227.67 kJ/mol，而 L-BMH 的平均活化能为 158.50-274.46 kJ/mol，转换范围为 0.2-0.8。发现 L-FMH 和 L-BMH 的高位热值（HHV）分别为 19.80±0.09 MJ/kg 和 19.65±0.03 MJ/kg。这些结果为提取的木质素作为聚合物复合材料中潜在的生物基阻燃剂的增值提供了可能性。
