Structural, morphological, and thermal characterization of kraft lignin and its charcoals obtained at different heating rates

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dc.contributor.authorBrazil T.R.
dc.contributor.authorCosta R.N.
dc.contributor.authorMassi M.
dc.contributor.authorRezende M.C.
dc.date.accessioned2024-03-12T23:58:10Z
dc.date.available2024-03-12T23:58:10Z
dc.date.issued2018
dc.description.abstract© 2018 IOP Publishing Ltd.Biomass is a renewable resource that is becoming more import due to environmental concerns and possible oil crisis. Thus, optimizing its use is a current challenge for many researchers. Lignin, which is a macromolecule with complex chemical structure, valuable physicochemical properties, and varied chemical composition, is available in large quantities in pulp and paper companies. The objective of this work is the physicochemical characterization of two Kraft lignin samples with different purities, and the study of its thermal conversion into charcoal. The lignin characterization was based on chemical, TGA, DSC, FT-IR, particle sizes, and FEG-SEM analyses. These analyses show that the lignins are mainly composed of guaiacyl and syringyl units, with residues of 30-36 wt.%, in inert atmosphere, depending on the lignin purity. From these results, the more purified lignin with higher carbon yield (%C) was selected for charcoal production. The heat treatment (HT) for carbonization of lignin, at different times (90, 180, and 420 min), resulted in different %C (41-44 wt.%). Longer HT resulted in higher %C and in charcoals with smaller pore sizes. Nanopores (∼50 nm) are observed for the charcoal obtained with the longest HT.
dc.description.issuenumber4
dc.description.volume5
dc.identifier.doi10.1088/2053-1591/aab7c2
dc.identifier.issn2053-1591
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/35546
dc.relation.ispartofMaterials Research Express
dc.rightsAcesso Restrito
dc.subject.otherlanguagecarbonization
dc.subject.otherlanguagecharacterization
dc.subject.otherlanguagecharcoal
dc.subject.otherlanguagekraft lignin
dc.titleStructural, morphological, and thermal characterization of kraft lignin and its charcoals obtained at different heating rates
dc.typeArtigo
local.scopus.citations16
local.scopus.eid2-s2.0-85045549384
local.scopus.subjectCharcoal production
local.scopus.subjectChemical compositions
local.scopus.subjectEnvironmental concerns
local.scopus.subjectKraft lignin
local.scopus.subjectLignin characterizations
local.scopus.subjectPhysico-chemical characterization
local.scopus.subjectRenewable resource
local.scopus.subjectThermal characterization
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85045549384&origin=inward
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