Improvement of wheat (T. aestivum) straw catalytic fast pyrolysis for valuable chemicals production by coupling pretreatment of acid washing and torrefaction

Xiong Gao; Zhen Zhou; Brad Coward; Jiawei Wang; Hong Tian; Yanshan Yin; Yi Cheng

doi:10.1016/j.indcrop.2022.115475

Improvement of wheat (T. aestivum) straw catalytic fast pyrolysis for valuable chemicals production by coupling pretreatment of acid washing and torrefaction

Xiong Gao, Zhen Zhou, Brad Coward, Jiawei Wang, Hong Tian, Yanshan Yin, Yi Cheng^*

^*Corresponding author for this work

Chemical Engineering & Applied Chemistry

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

Abstract

The present work investigated the coupling pretreatment of acid washing and torrefaction to address secondary cracking of target products and condensation of intermediates and improved bio-oil quality and hydrocarbon selectivity of the catalytic fast pyrolysis (CFP) process. The total hydrocarbon yields in CFP increased from 28.06 wt% to 55.31 wt% by torrefaction and 46.29 wt% by coupling pretreatment. The acid washing resulted in fewer acids and phenols and more sugars in bio-oil by decreasing the AAEMs. The removal rate of the potassium was up to 96.7 %, and other elements were above 83 %. Torrefaction elevated the C/O ratio and the higher calorific value of biomass. It could also decrease the acid content in obtained bio-oil in the CFP process. In addition, the TG/TGA results showed that higher torrefaction temperature decreased the total weight loss of biomass. Meanwhile, the acid washing pretreatment improved the resolution of the two pyrolysis peaks of the DTG curve. These results showed that the AAEMs removal and intermediates inhibition could elevate the selectivity of the valuable chemical.

Original language	English
Article number	115475
Number of pages	9
Journal	Industrial Crops and Products
Volume	187
Issue number	Part B
Early online date	9 Aug 2022
DOIs	https://doi.org/10.1016/j.indcrop.2022.115475
Publication status	Published - 1 Nov 2022

Bibliographical note

© 2022, The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/

Funding Information: This work was supported by the Natural Science Foundation of China for Young Scholars (No.51706022, No.52006016), the Key Foundation of Hunan Educational Committee of China (No. 20A004, No. 20B041), Natural Science Foundation of Changsha (No. kq2202202), and the Innovative Team of Key Technologies of Energy Conservation, Emission Reduction and Intelligent Control for Power-Generating Equipment and System at CSUST. The author Yi Cheng and Jiawei Wang would like to acknowledge the Marie Skłodowska Curie Actions Fellowships by The European Research Executive Agency (H2020-MSCA-IF-2020, no. 101025906).

Keywords

Acid washing
Catalytic fast pyrolysis
Pretreatment
Torrefaction
Wheat straw

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10.1016/j.indcrop.2022.115475

1-s2.0-S092666902200958X-main
© 2022, The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/
Final published version, 3.82 MBLicence: CC BY 4.0

Cite this

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title = "Improvement of wheat (T. aestivum) straw catalytic fast pyrolysis for valuable chemicals production by coupling pretreatment of acid washing and torrefaction",

abstract = "The present work investigated the coupling pretreatment of acid washing and torrefaction to address secondary cracking of target products and condensation of intermediates and improved bio-oil quality and hydrocarbon selectivity of the catalytic fast pyrolysis (CFP) process. The total hydrocarbon yields in CFP increased from 28.06 wt% to 55.31 wt% by torrefaction and 46.29 wt% by coupling pretreatment. The acid washing resulted in fewer acids and phenols and more sugars in bio-oil by decreasing the AAEMs. The removal rate of the potassium was up to 96.7 %, and other elements were above 83 %. Torrefaction elevated the C/O ratio and the higher calorific value of biomass. It could also decrease the acid content in obtained bio-oil in the CFP process. In addition, the TG/TGA results showed that higher torrefaction temperature decreased the total weight loss of biomass. Meanwhile, the acid washing pretreatment improved the resolution of the two pyrolysis peaks of the DTG curve. These results showed that the AAEMs removal and intermediates inhibition could elevate the selectivity of the valuable chemical.",

keywords = "Acid washing, Catalytic fast pyrolysis, Pretreatment, Torrefaction, Wheat straw",

author = "Xiong Gao and Zhen Zhou and Brad Coward and Jiawei Wang and Hong Tian and Yanshan Yin and Yi Cheng",

note = " {\textcopyright} 2022, The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/ Funding Information: This work was supported by the Natural Science Foundation of China for Young Scholars (No.51706022, No.52006016), the Key Foundation of Hunan Educational Committee of China (No. 20A004, No. 20B041), Natural Science Foundation of Changsha (No. kq2202202), and the Innovative Team of Key Technologies of Energy Conservation, Emission Reduction and Intelligent Control for Power-Generating Equipment and System at CSUST. The author Yi Cheng and Jiawei Wang would like to acknowledge the Marie Sk{\l}odowska Curie Actions Fellowships by The European Research Executive Agency (H2020-MSCA-IF-2020, no. 101025906). ",

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doi = "10.1016/j.indcrop.2022.115475",

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AU - Gao, Xiong

AU - Zhou, Zhen

AU - Coward, Brad

AU - Wang, Jiawei

AU - Tian, Hong

AU - Yin, Yanshan

AU - Cheng, Yi

N1 - © 2022, The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/ Funding Information: This work was supported by the Natural Science Foundation of China for Young Scholars (No.51706022, No.52006016), the Key Foundation of Hunan Educational Committee of China (No. 20A004, No. 20B041), Natural Science Foundation of Changsha (No. kq2202202), and the Innovative Team of Key Technologies of Energy Conservation, Emission Reduction and Intelligent Control for Power-Generating Equipment and System at CSUST. The author Yi Cheng and Jiawei Wang would like to acknowledge the Marie Skłodowska Curie Actions Fellowships by The European Research Executive Agency (H2020-MSCA-IF-2020, no. 101025906).

PY - 2022/11/1

Y1 - 2022/11/1

N2 - The present work investigated the coupling pretreatment of acid washing and torrefaction to address secondary cracking of target products and condensation of intermediates and improved bio-oil quality and hydrocarbon selectivity of the catalytic fast pyrolysis (CFP) process. The total hydrocarbon yields in CFP increased from 28.06 wt% to 55.31 wt% by torrefaction and 46.29 wt% by coupling pretreatment. The acid washing resulted in fewer acids and phenols and more sugars in bio-oil by decreasing the AAEMs. The removal rate of the potassium was up to 96.7 %, and other elements were above 83 %. Torrefaction elevated the C/O ratio and the higher calorific value of biomass. It could also decrease the acid content in obtained bio-oil in the CFP process. In addition, the TG/TGA results showed that higher torrefaction temperature decreased the total weight loss of biomass. Meanwhile, the acid washing pretreatment improved the resolution of the two pyrolysis peaks of the DTG curve. These results showed that the AAEMs removal and intermediates inhibition could elevate the selectivity of the valuable chemical.

AB - The present work investigated the coupling pretreatment of acid washing and torrefaction to address secondary cracking of target products and condensation of intermediates and improved bio-oil quality and hydrocarbon selectivity of the catalytic fast pyrolysis (CFP) process. The total hydrocarbon yields in CFP increased from 28.06 wt% to 55.31 wt% by torrefaction and 46.29 wt% by coupling pretreatment. The acid washing resulted in fewer acids and phenols and more sugars in bio-oil by decreasing the AAEMs. The removal rate of the potassium was up to 96.7 %, and other elements were above 83 %. Torrefaction elevated the C/O ratio and the higher calorific value of biomass. It could also decrease the acid content in obtained bio-oil in the CFP process. In addition, the TG/TGA results showed that higher torrefaction temperature decreased the total weight loss of biomass. Meanwhile, the acid washing pretreatment improved the resolution of the two pyrolysis peaks of the DTG curve. These results showed that the AAEMs removal and intermediates inhibition could elevate the selectivity of the valuable chemical.

KW - Acid washing

KW - Catalytic fast pyrolysis

KW - Pretreatment

KW - Torrefaction

KW - Wheat straw

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UR - https://www.sciencedirect.com/science/article/pii/S092666902200958X

U2 - 10.1016/j.indcrop.2022.115475

DO - 10.1016/j.indcrop.2022.115475

M3 - Article

SN - 0926-6690

VL - 187

JO - Industrial Crops and Products

JF - Industrial Crops and Products

IS - Part B

M1 - 115475

ER -

Improvement of wheat (T. aestivum) straw catalytic fast pyrolysis for valuable chemicals production by coupling pretreatment of acid washing and torrefaction

Abstract

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Keywords

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