Rapid microwave-assisted biomass delignification and lignin depolymerization in deep eutectic solvents

Pranjali D. Muley; Justin K. Mobley; Xinjie Tong; Brian Novak; Joseph Stevens; Dorel Moldovan; Jian Shi; Dorin Boldor

doi:10.1016/j.enconman.2019.06.070

Rapid microwave-assisted biomass delignification and lignin depolymerization in deep eutectic solvents

Pranjali D. Muley, Justin K. Mobley, Xinjie Tong, Brian Novak, Joseph Stevens, Dorel Moldovan, Jian Shi, Dorin Boldor

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

130 Scopus citations

Abstract

Biomass deconstruction and lignin depolymerization was performed using three different deep eutectic solvents. Various temperature (110°, 130°, and 150 °C) and time (1, 5, 10, 15 min) conditions were tested in a 2450 MHz microwave reactor. Oxalic acid (130 °C, 15 min) and formic acid DES (150 °C, 15 min) gave the highest lignin yield. Microwave heating reduced the processing time significantly. NMR characterization shows that microwave heating promotes selective bond cleavage during lignin depolymerization and has a narrow molecular weight distribution compared to conventional heating techniques. Molecular dynamic simulations showed that certain lignin bonds are stretched under the electric field imparted during microwave irradiation, increasing its probability of breaking.

Original language	English
Pages (from-to)	1080-1088
Number of pages	9
Journal	Energy Conversion and Management
Volume	196
DOIs	https://doi.org/10.1016/j.enconman.2019.06.070
State	Published - Sep 15 2019

Bibliographical note

Publisher Copyright:
© 2019

Keywords

Biomass deconstruction
Deep eutectic solvents
Lignin depolymerization
Microwave heating

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Nuclear Energy and Engineering
Fuel Technology
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.enconman.2019.06.070

Cite this

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title = "Rapid microwave-assisted biomass delignification and lignin depolymerization in deep eutectic solvents",

abstract = "Biomass deconstruction and lignin depolymerization was performed using three different deep eutectic solvents. Various temperature (110°, 130°, and 150 °C) and time (1, 5, 10, 15 min) conditions were tested in a 2450 MHz microwave reactor. Oxalic acid (130 °C, 15 min) and formic acid DES (150 °C, 15 min) gave the highest lignin yield. Microwave heating reduced the processing time significantly. NMR characterization shows that microwave heating promotes selective bond cleavage during lignin depolymerization and has a narrow molecular weight distribution compared to conventional heating techniques. Molecular dynamic simulations showed that certain lignin bonds are stretched under the electric field imparted during microwave irradiation, increasing its probability of breaking.",

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doi = "10.1016/j.enconman.2019.06.070",

language = "English",

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T1 - Rapid microwave-assisted biomass delignification and lignin depolymerization in deep eutectic solvents

AU - Muley, Pranjali D.

AU - Mobley, Justin K.

AU - Tong, Xinjie

AU - Novak, Brian

AU - Stevens, Joseph

AU - Moldovan, Dorel

AU - Shi, Jian

AU - Boldor, Dorin

PY - 2019/9/15

Y1 - 2019/9/15

N2 - Biomass deconstruction and lignin depolymerization was performed using three different deep eutectic solvents. Various temperature (110°, 130°, and 150 °C) and time (1, 5, 10, 15 min) conditions were tested in a 2450 MHz microwave reactor. Oxalic acid (130 °C, 15 min) and formic acid DES (150 °C, 15 min) gave the highest lignin yield. Microwave heating reduced the processing time significantly. NMR characterization shows that microwave heating promotes selective bond cleavage during lignin depolymerization and has a narrow molecular weight distribution compared to conventional heating techniques. Molecular dynamic simulations showed that certain lignin bonds are stretched under the electric field imparted during microwave irradiation, increasing its probability of breaking.

AB - Biomass deconstruction and lignin depolymerization was performed using three different deep eutectic solvents. Various temperature (110°, 130°, and 150 °C) and time (1, 5, 10, 15 min) conditions were tested in a 2450 MHz microwave reactor. Oxalic acid (130 °C, 15 min) and formic acid DES (150 °C, 15 min) gave the highest lignin yield. Microwave heating reduced the processing time significantly. NMR characterization shows that microwave heating promotes selective bond cleavage during lignin depolymerization and has a narrow molecular weight distribution compared to conventional heating techniques. Molecular dynamic simulations showed that certain lignin bonds are stretched under the electric field imparted during microwave irradiation, increasing its probability of breaking.

KW - Biomass deconstruction

KW - Deep eutectic solvents

KW - Lignin depolymerization

KW - Microwave heating

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M3 - Article

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VL - 196

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JO - Energy Conversion and Management

JF - Energy Conversion and Management

ER -

Rapid microwave-assisted biomass delignification and lignin depolymerization in deep eutectic solvents

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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