Valorization of lignin by partial wet oxidation using sustainable heteropoly acid catalysts

Abayneh Getachew Demesa; Arto Laari; Mika Sillanp; Tuomas Koiranen

doi:10.3390/molecules22101625

Valorization of lignin by partial wet oxidation using sustainable heteropoly acid catalysts

Abayneh Getachew Demesa, Arto Laari, Mika Sillanp, Tuomas Koiranen

Lappeenranta University of Technology

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

The production of carboxylic acids by partial wet oxidation of alkali lignin at elevated temperatures and pressures was studied experimentally. Two different heteropoly acids, phosphotungstic acid (H₃PW₁₂O₄₀) and phosphomolybdic acid (H₃PMo₁₂O₄₀), were used to catalyze the oxidation of lignin under hydrothermal conditions. Factors influencing the total yield of carboxylic acids formed during the partial oxidation of lignin were investigated. Formic, acetic and succinic acids were the major products identified. Of the two catalysts used, phosphomolybdic acid gave the most promising results, with carboxylic acid yields and lignin conversions of up to 45% and 95%, respectively.

Original language	English
Article number	1625
Journal	Molecules
Volume	22
Issue number	10
DOIs	https://doi.org/10.3390/molecules22101625
Publication status	Published - Oct 2017
Externally published	Yes

Keywords

Catalysts
Heteropoly acids
Lignin
Wet oxidation

ASJC Scopus subject areas

Analytical Chemistry
Chemistry (miscellaneous)
Molecular Medicine
Pharmaceutical Science
Drug Discovery
Physical and Theoretical Chemistry
Organic Chemistry

Access to Document

10.3390/molecules22101625

Cite this

@article{ace36b69ec174589a71c2220a458b0da,

title = "Valorization of lignin by partial wet oxidation using sustainable heteropoly acid catalysts",

abstract = "The production of carboxylic acids by partial wet oxidation of alkali lignin at elevated temperatures and pressures was studied experimentally. Two different heteropoly acids, phosphotungstic acid (H3PW12O40) and phosphomolybdic acid (H3PMo12O40), were used to catalyze the oxidation of lignin under hydrothermal conditions. Factors influencing the total yield of carboxylic acids formed during the partial oxidation of lignin were investigated. Formic, acetic and succinic acids were the major products identified. Of the two catalysts used, phosphomolybdic acid gave the most promising results, with carboxylic acid yields and lignin conversions of up to 45% and 95%, respectively.",

keywords = "Catalysts, Heteropoly acids, Lignin, Wet oxidation",

author = "Demesa, {Abayneh Getachew} and Arto Laari and Mika Sillanp and Tuomas Koiranen",

note = "Publisher Copyright: {\textcopyright} 2017 by the authors.",

year = "2017",

month = oct,

doi = "10.3390/molecules22101625",

language = "English",

volume = "22",

journal = "Molecules",

issn = "1420-3049",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "10",

}

TY - JOUR

T1 - Valorization of lignin by partial wet oxidation using sustainable heteropoly acid catalysts

AU - Demesa, Abayneh Getachew

AU - Laari, Arto

AU - Sillanp, Mika

AU - Koiranen, Tuomas

PY - 2017/10

Y1 - 2017/10

N2 - The production of carboxylic acids by partial wet oxidation of alkali lignin at elevated temperatures and pressures was studied experimentally. Two different heteropoly acids, phosphotungstic acid (H3PW12O40) and phosphomolybdic acid (H3PMo12O40), were used to catalyze the oxidation of lignin under hydrothermal conditions. Factors influencing the total yield of carboxylic acids formed during the partial oxidation of lignin were investigated. Formic, acetic and succinic acids were the major products identified. Of the two catalysts used, phosphomolybdic acid gave the most promising results, with carboxylic acid yields and lignin conversions of up to 45% and 95%, respectively.

AB - The production of carboxylic acids by partial wet oxidation of alkali lignin at elevated temperatures and pressures was studied experimentally. Two different heteropoly acids, phosphotungstic acid (H3PW12O40) and phosphomolybdic acid (H3PMo12O40), were used to catalyze the oxidation of lignin under hydrothermal conditions. Factors influencing the total yield of carboxylic acids formed during the partial oxidation of lignin were investigated. Formic, acetic and succinic acids were the major products identified. Of the two catalysts used, phosphomolybdic acid gave the most promising results, with carboxylic acid yields and lignin conversions of up to 45% and 95%, respectively.

KW - Catalysts

KW - Heteropoly acids

KW - Lignin

KW - Wet oxidation

UR - http://www.scopus.com/inward/record.url?scp=85030792936&partnerID=8YFLogxK

U2 - 10.3390/molecules22101625

DO - 10.3390/molecules22101625

M3 - Article

C2 - 28956838

AN - SCOPUS:85030792936

SN - 1420-3049

VL - 22

JO - Molecules

JF - Molecules

IS - 10

M1 - 1625

ER -

Valorization of lignin by partial wet oxidation using sustainable heteropoly acid catalysts

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this