Influence of torrefaction pretreatment on corncobs: A study on fundamental characteristics, thermal behavior, and kinetic

Xiaojie Tian; Leilei Dai; Yunpu Wang; Zihong Zeng; Shumei Zhang; Lin Jiang; Xiuhua Yang; Linqing Yue; Yuhuan Liu; Roger Ruan

doi:10.1016/j.biortech.2019.122490

Influence of torrefaction pretreatment on corncobs: A study on fundamental characteristics, thermal behavior, and kinetic

Xiaojie Tian, Leilei Dai, Yunpu Wang, Zihong Zeng, Shumei Zhang, Lin Jiang, Xiuhua Yang, Linqing Yue, Yuhuan Liu, Roger Ruan

Bioproducts and Biosystems Engineering

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Abstract

The effects of torrefaction pretreatment on corncobs properties and its pyrolysis kinetic parameters were investigated in this study. Proximate and ultimate analyses indicated that torrefaction increased the H/C_eff ratio and higher heating value of corncobs, and reduced its oxygen content. Although the mass yield was also reduced, the corresponding energy yield was relatively higher. The crystallinity index of biomass showed a first upward and then downward trend with the torrefaction temperature. Kinetic parameters obtained from three models indicated that both the activation energy and the pre-exponential factor increased with the elevated torrefaction temperature and it's better to calculate the activation energy by the OFW method and to use the KAS and DAEM methods to calculate the pre-exponential factor. In addition, it was found that the optimum pretreatment temperature of corncobs was 240 °C.

Original language	English (US)
Article number	122490
Journal	Bioresource Technology
Volume	297
DOIs	https://doi.org/10.1016/j.biortech.2019.122490
State	Published - Feb 2020

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© 2019 Elsevier Ltd

Keywords

Kinetics
Structure analysis
Thermogravimetry
Torrefaction

PubMed: MeSH publication types

Journal Article

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

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title = "Influence of torrefaction pretreatment on corncobs: A study on fundamental characteristics, thermal behavior, and kinetic",

abstract = "The effects of torrefaction pretreatment on corncobs properties and its pyrolysis kinetic parameters were investigated in this study. Proximate and ultimate analyses indicated that torrefaction increased the H/Ceff ratio and higher heating value of corncobs, and reduced its oxygen content. Although the mass yield was also reduced, the corresponding energy yield was relatively higher. The crystallinity index of biomass showed a first upward and then downward trend with the torrefaction temperature. Kinetic parameters obtained from three models indicated that both the activation energy and the pre-exponential factor increased with the elevated torrefaction temperature and it's better to calculate the activation energy by the OFW method and to use the KAS and DAEM methods to calculate the pre-exponential factor. In addition, it was found that the optimum pretreatment temperature of corncobs was 240 °C.",

keywords = "Kinetics, Structure analysis, Thermogravimetry, Torrefaction",

author = "Xiaojie Tian and Leilei Dai and Yunpu Wang and Zihong Zeng and Shumei Zhang and Lin Jiang and Xiuhua Yang and Linqing Yue and Yuhuan Liu and Roger Ruan",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

month = feb,

doi = "10.1016/j.biortech.2019.122490",

language = "English (US)",

volume = "297",

journal = "Bioresource Technology",

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T1 - Influence of torrefaction pretreatment on corncobs

T2 - A study on fundamental characteristics, thermal behavior, and kinetic

AU - Tian, Xiaojie

AU - Dai, Leilei

AU - Wang, Yunpu

AU - Zeng, Zihong

AU - Zhang, Shumei

AU - Jiang, Lin

AU - Yang, Xiuhua

AU - Yue, Linqing

AU - Liu, Yuhuan

AU - Ruan, Roger

PY - 2020/2

Y1 - 2020/2

N2 - The effects of torrefaction pretreatment on corncobs properties and its pyrolysis kinetic parameters were investigated in this study. Proximate and ultimate analyses indicated that torrefaction increased the H/Ceff ratio and higher heating value of corncobs, and reduced its oxygen content. Although the mass yield was also reduced, the corresponding energy yield was relatively higher. The crystallinity index of biomass showed a first upward and then downward trend with the torrefaction temperature. Kinetic parameters obtained from three models indicated that both the activation energy and the pre-exponential factor increased with the elevated torrefaction temperature and it's better to calculate the activation energy by the OFW method and to use the KAS and DAEM methods to calculate the pre-exponential factor. In addition, it was found that the optimum pretreatment temperature of corncobs was 240 °C.

AB - The effects of torrefaction pretreatment on corncobs properties and its pyrolysis kinetic parameters were investigated in this study. Proximate and ultimate analyses indicated that torrefaction increased the H/Ceff ratio and higher heating value of corncobs, and reduced its oxygen content. Although the mass yield was also reduced, the corresponding energy yield was relatively higher. The crystallinity index of biomass showed a first upward and then downward trend with the torrefaction temperature. Kinetic parameters obtained from three models indicated that both the activation energy and the pre-exponential factor increased with the elevated torrefaction temperature and it's better to calculate the activation energy by the OFW method and to use the KAS and DAEM methods to calculate the pre-exponential factor. In addition, it was found that the optimum pretreatment temperature of corncobs was 240 °C.

KW - Kinetics

KW - Structure analysis

KW - Thermogravimetry

KW - Torrefaction

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U2 - 10.1016/j.biortech.2019.122490

DO - 10.1016/j.biortech.2019.122490

M3 - Article

C2 - 31812595

AN - SCOPUS:85076515372

SN - 0960-8524

VL - 297

JO - Bioresource Technology

JF - Bioresource Technology

M1 - 122490

ER -

Influence of torrefaction pretreatment on corncobs: A study on fundamental characteristics, thermal behavior, and kinetic

Abstract

Bibliographical note

Keywords

PubMed: MeSH publication types

UN SDGs

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