期刊
VIBRATIONAL SPECTROSCOPY
卷 99, 期 -, 页码 130-136出版社
ELSEVIER
DOI: 10.1016/j.vibspec.2018.08.021
关键词
Kraft lignin; Activated carbon; Carbonization; Surface treatment
资金
- Brazilian agency FAPESP [2014/12918-5]
- Brazilian agency CAPES/PVNS
- Brazilian agency CNPq [303287/2013-6]
Lignin is a biomass derived from an abundant renewable source, rich in carbon and with potential application in modem society. The goal of this work is to add more value to lignin through its thermal conversion in charcoal, as well contribute to solutions linked to environmental preservation. Charcoal was obtained from Kraft lignin and its surface was modified using chemical (acid attack) and physical (microwave plasma) methods, in order to get charcoals different characteristics. In this work, the prepared charcoals were characterized by field emission gun - scanning electron microscope (FEG-SEM), Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), and superficial area by BET analyses. Microscopic analyses evidenced morphological differences in the samples as consequence of the used superficial treatments. Raman spectroscopy results point to an increase in the carbon material disorder after chemical and physical treatments. The acid attack of charcoal increased its superficial area by 40% (403 m(2)/g) in relation to the charcoal without chemical treatment (287 m(2)/g). Physical treatment based on microwave plasma promoted a further increase in superficial area of 63% (468 m(2)/g). FT-IR showed that chemically treated charcoals presented more functional groups. Based on these results, it can be verified that the production of activated charcoal from lignin is viable and its superficial area can be increased using acid and plasma treatments, the latter being a more efficient and clean method.
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