Hydrothermal pretreatment of bamboo sawdust using microwave irradiation

Leilei Dai; Chao He; Yunpu Wang; Yuhuan Liu; Roger Ruan; Zhenting Yu; Yue Zhou; Dengle Duan; Liangliang Fan; Yunfeng Zhao

doi:10.1016/j.biortech.2017.08.104

Hydrothermal pretreatment of bamboo sawdust using microwave irradiation

Leilei Dai, Chao He, Yunpu Wang, Yuhuan Liu, Roger Ruan, Zhenting Yu, Yue Zhou, Dengle Duan, Liangliang Fan, Yunfeng Zhao

Bioproducts and Biosystems Engineering

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

28 Scopus citations

Abstract

In the present study, the effect of temperature and residence time during microwave hydrothermal pretreatment (MHT) on hydrochar properties and pyrolysis behaviors was investigated. Experimental results indicated that higher heating value (HHV) and fixed carbon content gradually increased with increased pretreatment severity. Obvious reduction of oxygen content was found under MHT at 230 °C-15 min and 210 °C-35 min. Although lower mass yield was observed under severe conditions, corresponding energy yield was relatively higher. Crystallinity indexes of hydrochar demonstrated an upward trend with increased residence time. Unlike hydroxyl group, dissociation of acetyls was more favorable under prolonged residence time rather than increased temperature. Peaks in thermogravimetric and derivative thermogravimetric curves shifted to higher temperature region under severe conditions, indicating better thermal stability. Py-GC/MS analysis suggested that acids content was decreased but sugars increased with increased MHT severity. Moreover, compared to temperature, residence time was mainly responsible for acetic acid formation.

Original language	English (US)
Pages (from-to)	234-241
Number of pages	8
Journal	Bioresource Technology
Volume	247
DOIs	https://doi.org/10.1016/j.biortech.2017.08.104
State	Published - 2018

Bibliographical note

Funding Information:
We gratefully acknowledge the financial support from the National Natural Science Foundation of China (Nos. 21766019 and 21466022 ), International Cooperation Project of MOST. P.R. China ( 2015DFA60170-4 ), The Key Research and Development Program of Jiangxi Province ( 20171BBF60023 ), Science and Technology Research Project of Jiangxi Province Education Department (No. GJJ150213 ), Innovation and Entrepreneurship Development Fund of “Thousand talents program” Talent (No. 1001-02102082 ), Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development (No. Y707sb1001 )”.

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

Hydrochar properties
Hydrothermal pretreatment
Microwave irradiation
Pyrolysis behaviors

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

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10.1016/j.biortech.2017.08.104

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title = "Hydrothermal pretreatment of bamboo sawdust using microwave irradiation",

abstract = "In the present study, the effect of temperature and residence time during microwave hydrothermal pretreatment (MHT) on hydrochar properties and pyrolysis behaviors was investigated. Experimental results indicated that higher heating value (HHV) and fixed carbon content gradually increased with increased pretreatment severity. Obvious reduction of oxygen content was found under MHT at 230 °C-15 min and 210 °C-35 min. Although lower mass yield was observed under severe conditions, corresponding energy yield was relatively higher. Crystallinity indexes of hydrochar demonstrated an upward trend with increased residence time. Unlike hydroxyl group, dissociation of acetyls was more favorable under prolonged residence time rather than increased temperature. Peaks in thermogravimetric and derivative thermogravimetric curves shifted to higher temperature region under severe conditions, indicating better thermal stability. Py-GC/MS analysis suggested that acids content was decreased but sugars increased with increased MHT severity. Moreover, compared to temperature, residence time was mainly responsible for acetic acid formation.",

keywords = "Hydrochar properties, Hydrothermal pretreatment, Microwave irradiation, Pyrolysis behaviors",

author = "Leilei Dai and Chao He and Yunpu Wang and Yuhuan Liu and Roger Ruan and Zhenting Yu and Yue Zhou and Dengle Duan and Liangliang Fan and Yunfeng Zhao",

note = "Funding Information: We gratefully acknowledge the financial support from the National Natural Science Foundation of China (Nos. 21766019 and 21466022 ), International Cooperation Project of MOST. P.R. China ( 2015DFA60170-4 ), The Key Research and Development Program of Jiangxi Province ( 20171BBF60023 ), Science and Technology Research Project of Jiangxi Province Education Department (No. GJJ150213 ), Innovation and Entrepreneurship Development Fund of “Thousand talents program” Talent (No. 1001-02102082 ), Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development (No. Y707sb1001 )”. Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

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AU - Dai, Leilei

AU - He, Chao

AU - Wang, Yunpu

AU - Liu, Yuhuan

AU - Ruan, Roger

AU - Yu, Zhenting

AU - Zhou, Yue

AU - Duan, Dengle

AU - Fan, Liangliang

AU - Zhao, Yunfeng

N1 - Funding Information: We gratefully acknowledge the financial support from the National Natural Science Foundation of China (Nos. 21766019 and 21466022 ), International Cooperation Project of MOST. P.R. China ( 2015DFA60170-4 ), The Key Research and Development Program of Jiangxi Province ( 20171BBF60023 ), Science and Technology Research Project of Jiangxi Province Education Department (No. GJJ150213 ), Innovation and Entrepreneurship Development Fund of “Thousand talents program” Talent (No. 1001-02102082 ), Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development (No. Y707sb1001 )”. Publisher Copyright: © 2017 Elsevier Ltd

PY - 2018

Y1 - 2018

N2 - In the present study, the effect of temperature and residence time during microwave hydrothermal pretreatment (MHT) on hydrochar properties and pyrolysis behaviors was investigated. Experimental results indicated that higher heating value (HHV) and fixed carbon content gradually increased with increased pretreatment severity. Obvious reduction of oxygen content was found under MHT at 230 °C-15 min and 210 °C-35 min. Although lower mass yield was observed under severe conditions, corresponding energy yield was relatively higher. Crystallinity indexes of hydrochar demonstrated an upward trend with increased residence time. Unlike hydroxyl group, dissociation of acetyls was more favorable under prolonged residence time rather than increased temperature. Peaks in thermogravimetric and derivative thermogravimetric curves shifted to higher temperature region under severe conditions, indicating better thermal stability. Py-GC/MS analysis suggested that acids content was decreased but sugars increased with increased MHT severity. Moreover, compared to temperature, residence time was mainly responsible for acetic acid formation.

AB - In the present study, the effect of temperature and residence time during microwave hydrothermal pretreatment (MHT) on hydrochar properties and pyrolysis behaviors was investigated. Experimental results indicated that higher heating value (HHV) and fixed carbon content gradually increased with increased pretreatment severity. Obvious reduction of oxygen content was found under MHT at 230 °C-15 min and 210 °C-35 min. Although lower mass yield was observed under severe conditions, corresponding energy yield was relatively higher. Crystallinity indexes of hydrochar demonstrated an upward trend with increased residence time. Unlike hydroxyl group, dissociation of acetyls was more favorable under prolonged residence time rather than increased temperature. Peaks in thermogravimetric and derivative thermogravimetric curves shifted to higher temperature region under severe conditions, indicating better thermal stability. Py-GC/MS analysis suggested that acids content was decreased but sugars increased with increased MHT severity. Moreover, compared to temperature, residence time was mainly responsible for acetic acid formation.

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KW - Hydrothermal pretreatment

KW - Microwave irradiation

KW - Pyrolysis behaviors

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Hydrothermal pretreatment of bamboo sawdust using microwave irradiation

Abstract

Bibliographical note

Keywords

UN SDGs

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