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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Rational production of highly acidic sulfonated carbons from kraft lignins employing a fractionation process combined with acid-assisted hydrothermal carbonization

Full text
Author(s):
Nunes, Renan S. [1] ; Tudino, Tatiane C. [1] ; Vieira, Ligia M. [2] ; Mandelli, Dalmo [1] ; Carvalho, Wagner A. [1]
Total Authors: 5
Affiliation:
[1] Fed Univ ABC UFABC, Ctr Nat Sci & Humanities, Santo Andre, SP - Brazil
[2] Fed Fluminense Univ UFF, Inst Exact Sci, Volta Redonda - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Bioresource Technology; v. 303, MAY 2020.
Web of Science Citations: 0
Abstract

Highly acidic lignin-derived sulfonated carbons (LDSCs) were produced from hardwood and softwood kraft lignins under mild conditions by applying fractionation and/or pre-carbonization treatments combined with acid-assisted hydrothermal carbonization. The use of lignin fraction with higher amount oxygen, obtained from the fractionation process, resulted in carbon with the highest density of surface acid groups and improved catalytic activity. The LDSCs were successful tested in the dehydration reaction of fructose to obtain 5-hydroxymethylfurfural, and the best catalyst can be recycled without loss in its catalytic activity after perform a simple regeneration process. In contrast, the pre-carbonization step, commonly performed in several works, resulted in LDSCs with low acidity. A simple and optimized methodology for obtaining LDSCs under mild conditions was developed, and the correlations between the preparation method and the physicochemical and catalytic properties established in this work may be extendible to other starting materials for rational sulfonated carbons production. (AU)

FAPESP's process: 16/05006-5 - Contaminants removal from pharmaceutical industry effluents using new materials from waste biodiesel
Grantee:Maraisa Gonçalves
Support Opportunities: Regular Research Grants
FAPESP's process: 17/24931-4 - Polyols conversion promoted by alternative catalysts under conventional and microwave heating
Grantee:Wagner Alves Carvalho
Support Opportunities: Regular Research Grants