期刊
FORESTS
卷 10, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/f10060483
关键词
lignin; chemical composition; thermal degradation; activation energy; methoxyl groups; molecular weight distribution
类别
资金
- Slovak Research and Development Agency [APVV-15-0052, APVV-14-0393, APVV-16-0088, APVV-16-0326, VEGA 1/0403/19, VEGA 1/0387/18]
- Operation Program Research and Development for the project National Center for Research and Application of renewable energy sources [ITMS 26240120016, ITMS 26240120028]
- Operation Program Research and Development for the project Competence center for new materials, advanced technologies and energy [ITMS 26240220073]
- Operation Program Research and Development for the project University science park STU Bratislava [ITMS 26240220084]
- European Regional Development Fund
Lignin has great potential for utilization as a green raw material or as an additive in various industrial applications, such as energy, valuable chemicals, or cost-effective materials. In this study, we assessed a commercial form of lignin isolated using LignoBoost technology (LB lignin) as well as three other types of lignin (two samples of non-wood lignins and one hardwood kraft lignin) isolated from the waste liquors produced during the pulping process. Measurements were taken for elemental analysis, methoxyl and ash content, higher heating values, thermogravimetric analysis, and molecular weight determination. We found that the elemental composition of the isolated lignins affected their thermal stability, activation energies, and higher heating values. The lignin samples examined showed varying amounts of functional groups, inorganic component compositions, and molecular weight distributions. Mean activation energies ranged from 93 to 281 kJ/mol. Lignins with bimodal molecular weight distribution were thermally decomposed in two stages, whereas the LB lignin showing a unimodal molecular weight distribution was decomposed in a single thermal stage. Based on its thermal properties, the LB lignin may find direct applications in biocomposites where a higher thermal resistance is required.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据