Reductive de-polymerization of kraft lignin for chemicals and fuels using formic acid as an in-situ hydrogen source

Shanhua Huang; Nubla Mahmood; Matthew Tymchyshyn; Zhongshun Yuan; Chunbao Charles Xu

doi:10.1016/j.biortech.2014.08.045

Reductive de-polymerization of kraft lignin for chemicals and fuels using formic acid as an in-situ hydrogen source

Shanhua Huang, Nubla Mahmood, Matthew Tymchyshyn, Zhongshun Yuan, Chunbao Charles Xu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

101 Citations (Scopus)

Abstract

In this study, formic acid (FA) was employed as an in-situ hydrogen donor for the reductive de-polymerization of kraft lignin (KL). Under the optimum operating conditions, i.e., 300 °C, 1 h, 18.6 wt.% substrate concentration, 50/50 (v/v) water-ethanol medium with FA at a FA-to-lignin mass ratio of 0.7, KL(M_w~ 10,000. g/mol) was effectively de-polymerized, producing de-polymerized lignin (DL, M_w 1270 g/mol) at a yield of ~90. wt.% and <1. wt.% yield of solid residue (SR). The M_W of the DL products decreased with increasing reaction temperature, time and FA-to-lignin mass ratio. The sulfur contents of all DL products were remarkably lower than that in the original KL. It was also demonstrated that FA is a more reactive hydrogen source than external hydrogen for reductive de-polymerization of KL. © 2014 Elsevier Ltd.

Original language	English
Pages (from-to)	95-102
Journal	Bioresource Technology
Volume	171
DOIs	https://doi.org/10.1016/j.biortech.2014.08.045
Publication status	Published - Nov 2014
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

De-polymerization
Formic acid
Hydrogen
Lignin
Molecular weight

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title = "Reductive de-polymerization of kraft lignin for chemicals and fuels using formic acid as an in-situ hydrogen source",

abstract = "In this study, formic acid (FA) was employed as an in-situ hydrogen donor for the reductive de-polymerization of kraft lignin (KL). Under the optimum operating conditions, i.e., 300 °C, 1 h, 18.6 wt.% substrate concentration, 50/50 (v/v) water-ethanol medium with FA at a FA-to-lignin mass ratio of 0.7, KL(Mw~ 10,000. g/mol) was effectively de-polymerized, producing de-polymerized lignin (DL, Mw 1270 g/mol) at a yield of ~90. wt.% and <1. wt.% yield of solid residue (SR). The MW of the DL products decreased with increasing reaction temperature, time and FA-to-lignin mass ratio. The sulfur contents of all DL products were remarkably lower than that in the original KL. It was also demonstrated that FA is a more reactive hydrogen source than external hydrogen for reductive de-polymerization of KL. {\textcopyright} 2014 Elsevier Ltd.",

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author = "Shanhua Huang and Nubla Mahmood and Matthew Tymchyshyn and Zhongshun Yuan and Xu, {Chunbao Charles}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected]. ",

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doi = "10.1016/j.biortech.2014.08.045",

language = "English",

volume = "171",

pages = "95--102",

journal = "Bioresource Technology",

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T1 - Reductive de-polymerization of kraft lignin for chemicals and fuels using formic acid as an in-situ hydrogen source

AU - Huang, Shanhua

AU - Mahmood, Nubla

AU - Tymchyshyn, Matthew

AU - Yuan, Zhongshun

AU - Xu, Chunbao Charles

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2014/11

Y1 - 2014/11

N2 - In this study, formic acid (FA) was employed as an in-situ hydrogen donor for the reductive de-polymerization of kraft lignin (KL). Under the optimum operating conditions, i.e., 300 °C, 1 h, 18.6 wt.% substrate concentration, 50/50 (v/v) water-ethanol medium with FA at a FA-to-lignin mass ratio of 0.7, KL(Mw~ 10,000. g/mol) was effectively de-polymerized, producing de-polymerized lignin (DL, Mw 1270 g/mol) at a yield of ~90. wt.% and <1. wt.% yield of solid residue (SR). The MW of the DL products decreased with increasing reaction temperature, time and FA-to-lignin mass ratio. The sulfur contents of all DL products were remarkably lower than that in the original KL. It was also demonstrated that FA is a more reactive hydrogen source than external hydrogen for reductive de-polymerization of KL. © 2014 Elsevier Ltd.

AB - In this study, formic acid (FA) was employed as an in-situ hydrogen donor for the reductive de-polymerization of kraft lignin (KL). Under the optimum operating conditions, i.e., 300 °C, 1 h, 18.6 wt.% substrate concentration, 50/50 (v/v) water-ethanol medium with FA at a FA-to-lignin mass ratio of 0.7, KL(Mw~ 10,000. g/mol) was effectively de-polymerized, producing de-polymerized lignin (DL, Mw 1270 g/mol) at a yield of ~90. wt.% and <1. wt.% yield of solid residue (SR). The MW of the DL products decreased with increasing reaction temperature, time and FA-to-lignin mass ratio. The sulfur contents of all DL products were remarkably lower than that in the original KL. It was also demonstrated that FA is a more reactive hydrogen source than external hydrogen for reductive de-polymerization of KL. © 2014 Elsevier Ltd.

KW - De-polymerization

KW - Formic acid

KW - Hydrogen

KW - Lignin

KW - Molecular weight

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DO - 10.1016/j.biortech.2014.08.045

M3 - RGC 21 - Publication in refereed journal

C2 - 25189514

SN - 0960-8524

VL - 171

SP - 95

EP - 102

JO - Bioresource Technology

JF - Bioresource Technology

ER -

Reductive de-polymerization of kraft lignin for chemicals and fuels using formic acid as an in-situ hydrogen source

Abstract

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Research Keywords

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