Non-thermal gas-phase pulsed corona discharge for lignin modification

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Non-thermal gas-phase pulsed corona discharge for lignin modification. / Sokolov, Alexander; Lagerquist, Lucas; Eklund, Patrik; Louhi-Kultanen, Marjatta.

In: Chemical Engineering and Processing - Process Intensification, Vol. 126, 01.04.2018, p. 141-149.

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@article{14d1411754a14c9f81bef395c7248d4c,
title = "Non-thermal gas-phase pulsed corona discharge for lignin modification",
abstract = "Lignin has the potential to become a significant resource of renewable aromatics for the chemical industry. The current work studies pulsed corona discharge (PCD) as an alternative method for lignin modification. The effect of initial lignin concentration and gas phase composition on aldehydes formation was studied experimentally. Kraft lignin was used as a test compound. It was concluded in the work, that treatment in low oxygen content atmosphere and high initial lignin concentration leads to higher lignin conversion to aldehydes. Despite the proven aldehydes formation, the precise nature of the changes in the lignin structure during oxidation with PCD remained unclear. To address this question, a number of advanced analytical techniques were implemented: NMR, GPC, HSQC, HPSEC, and GCMS. The effect of PCD treatment on lignin structure was studied for two types of lignin: kraft lignin, purchased from Sigma Aldrich, and birch lignin acquired from a pressurized hot water extraction and soda pulped biorefinery process (BLN lignin). Changes in solubility, molecular weight and proportion of phenolic and aliphatic OH groups, as well as lignin repolymerization were detected. The findings are of value to efforts to make lignin modification tunable to the production of desired products.",
keywords = "Aldehydes, AOPs, Cold plasma, Lignin, Modification",
author = "Alexander Sokolov and Lucas Lagerquist and Patrik Eklund and Marjatta Louhi-Kultanen",
year = "2018",
month = "4",
day = "1",
doi = "10.1016/j.cep.2018.02.028",
language = "English",
volume = "126",
pages = "141--149",
journal = "Chemical Engineering and Processing",
issn = "0255-2701",
publisher = "Elsevier Science",

}

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TY - JOUR

T1 - Non-thermal gas-phase pulsed corona discharge for lignin modification

AU - Sokolov, Alexander

AU - Lagerquist, Lucas

AU - Eklund, Patrik

AU - Louhi-Kultanen, Marjatta

PY - 2018/4/1

Y1 - 2018/4/1

N2 - Lignin has the potential to become a significant resource of renewable aromatics for the chemical industry. The current work studies pulsed corona discharge (PCD) as an alternative method for lignin modification. The effect of initial lignin concentration and gas phase composition on aldehydes formation was studied experimentally. Kraft lignin was used as a test compound. It was concluded in the work, that treatment in low oxygen content atmosphere and high initial lignin concentration leads to higher lignin conversion to aldehydes. Despite the proven aldehydes formation, the precise nature of the changes in the lignin structure during oxidation with PCD remained unclear. To address this question, a number of advanced analytical techniques were implemented: NMR, GPC, HSQC, HPSEC, and GCMS. The effect of PCD treatment on lignin structure was studied for two types of lignin: kraft lignin, purchased from Sigma Aldrich, and birch lignin acquired from a pressurized hot water extraction and soda pulped biorefinery process (BLN lignin). Changes in solubility, molecular weight and proportion of phenolic and aliphatic OH groups, as well as lignin repolymerization were detected. The findings are of value to efforts to make lignin modification tunable to the production of desired products.

AB - Lignin has the potential to become a significant resource of renewable aromatics for the chemical industry. The current work studies pulsed corona discharge (PCD) as an alternative method for lignin modification. The effect of initial lignin concentration and gas phase composition on aldehydes formation was studied experimentally. Kraft lignin was used as a test compound. It was concluded in the work, that treatment in low oxygen content atmosphere and high initial lignin concentration leads to higher lignin conversion to aldehydes. Despite the proven aldehydes formation, the precise nature of the changes in the lignin structure during oxidation with PCD remained unclear. To address this question, a number of advanced analytical techniques were implemented: NMR, GPC, HSQC, HPSEC, and GCMS. The effect of PCD treatment on lignin structure was studied for two types of lignin: kraft lignin, purchased from Sigma Aldrich, and birch lignin acquired from a pressurized hot water extraction and soda pulped biorefinery process (BLN lignin). Changes in solubility, molecular weight and proportion of phenolic and aliphatic OH groups, as well as lignin repolymerization were detected. The findings are of value to efforts to make lignin modification tunable to the production of desired products.

KW - Aldehydes

KW - AOPs

KW - Cold plasma

KW - Lignin

KW - Modification

UR - http://www.scopus.com/inward/record.url?scp=85042944790&partnerID=8YFLogxK

U2 - 10.1016/j.cep.2018.02.028

DO - 10.1016/j.cep.2018.02.028

M3 - Article

VL - 126

SP - 141

EP - 149

JO - Chemical Engineering and Processing

JF - Chemical Engineering and Processing

SN - 0255-2701

ER -

ID: 18522908