@Article{BrazilOliBalMasRez:2018:EfDiSu,
author = "Brazil, Tayra R. and Oliveira Junior, Mauro S. and Baldan,
Maur{\'{\i}}cio Ribeiro and Massi, Marcos and Rezende, Mirabel
C.",
affiliation = "{Universidade Federal de S{\~a}o Paulo (UNIFESP)} and
{Universidade Federal de S{\~a}o Paulo (UNIFESP)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidade Federal
de S{\~a}o Paulo (UNIFESP)} and {Universidade Federal de S{\~a}o
Paulo (UNIFESP)}",
title = "Effect of different superficial treatments on structural,
morphological and superficial area of Kraft lignin based
charcoal",
journal = "Vibrational Spectroscopy",
year = "2018",
volume = "99",
pages = "130--136",
month = "Nov.",
keywords = "Kraft lignin, Activated carbon, Carbonization, Surface
treatment.",
abstract = "Lignin is a biomass derived from an abundant renewable source,
rich in carbon and with potential application in modern 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 m2 /g) in relation to the charcoal without chemical treatment
(287 m2 /g). Physical treatment based on microwave plasma promoted
a further increase in superficial area of 63% (468 m2 /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.",
doi = "10.1016/j.vibspec.2018.08.021",
url = "http://dx.doi.org/10.1016/j.vibspec.2018.08.021",
issn = "0924-2031",
language = "en",
targetfile = "brazil_effect.pdf",
urlaccessdate = "27 abr. 2024"
}