Microwave pyrolysis of walnut shell for reduction process of low-grade pyrolusite

Kangqiang Li; Guo Chen; Jin Chen; Jinhui Peng; Roger Ruan; C. Srinivasakannan

doi:10.1016/j.biortech.2019.121838

Microwave pyrolysis of walnut shell for reduction process of low-grade pyrolusite

Kangqiang Li, Guo Chen, Jin Chen, Jinhui Peng, Roger Ruan, C. Srinivasakannan

Bioproducts and Biosystems Engineering

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

65 Scopus citations

Abstract

Replacing fossil energy by utilizing biomass as carbon source to convert metal oxides has meaning for reduction of minerals. Microwave pyrolysis of walnut shell for reduction process of low-grade pyrolusite was proposed. Thermogravimetric analysis indicated biomass pyrolysis process for reduction of pyrolusite was divided into four phases identified by temperatures: dehydration stage (<150 °C), pre-pyrolysis stage (150 °C–290 °C), curing decomposition stage (290 °C–480 °C) and carbonization stage (>480 °C), and manganese recovery reached 92.01% at 650 °C for 30 min with 18% walnut shell. The strongest preferential orientation of MnO was appeared, with good crystalline structure and no MnO₂ and FeO peaks detected. The product surface became loose and porous with numerous cracks, pits and holes, and molten granules were interconnected and stacked with regular shape. The methods propose new idea of selective reduction of pyrolusite based on biomass pyrolysis by microwave heating.

Original language	English (US)
Article number	121838
Journal	Bioresource Technology
Volume	291
DOIs	https://doi.org/10.1016/j.biortech.2019.121838
State	Published - Nov 2019

Bibliographical note

Funding Information:
Financial supports from the National Natural Science Foundation of China (No: U1802255 ), the Key Projects in the National Science & Technology Pillar Program during the Twelfth Five-year Plan Period (No. 2015BAB17B00 ), the Hunan Provincial Science and Technology Plan Project, China (No. 2016TP1007 ), and Innovative Research Team (in Science and Technology) in University of Yunnan Province were sincerely acknowledged.

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

Biomass pyrolysis
Low-grade pyrolusite
Microwave heating
Phase transformation
Structural
Thermal behavior

UN SDGs

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

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10.1016/j.biortech.2019.121838

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title = "Microwave pyrolysis of walnut shell for reduction process of low-grade pyrolusite",

abstract = "Replacing fossil energy by utilizing biomass as carbon source to convert metal oxides has meaning for reduction of minerals. Microwave pyrolysis of walnut shell for reduction process of low-grade pyrolusite was proposed. Thermogravimetric analysis indicated biomass pyrolysis process for reduction of pyrolusite was divided into four phases identified by temperatures: dehydration stage (<150 °C), pre-pyrolysis stage (150 °C–290 °C), curing decomposition stage (290 °C–480 °C) and carbonization stage (>480 °C), and manganese recovery reached 92.01% at 650 °C for 30 min with 18% walnut shell. The strongest preferential orientation of MnO was appeared, with good crystalline structure and no MnO2 and FeO peaks detected. The product surface became loose and porous with numerous cracks, pits and holes, and molten granules were interconnected and stacked with regular shape. The methods propose new idea of selective reduction of pyrolusite based on biomass pyrolysis by microwave heating.",

keywords = "Biomass pyrolysis, Low-grade pyrolusite, Microwave heating, Phase transformation, Structural, Thermal behavior",

author = "Kangqiang Li and Guo Chen and Jin Chen and Jinhui Peng and Roger Ruan and C. Srinivasakannan",

note = "Funding Information: Financial supports from the National Natural Science Foundation of China (No: U1802255 ), the Key Projects in the National Science & Technology Pillar Program during the Twelfth Five-year Plan Period (No. 2015BAB17B00 ), the Hunan Provincial Science and Technology Plan Project, China (No. 2016TP1007 ), and Innovative Research Team (in Science and Technology) in University of Yunnan Province were sincerely acknowledged. Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

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doi = "10.1016/j.biortech.2019.121838",

language = "English (US)",

volume = "291",

journal = "Bioresource Technology",

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AU - Li, Kangqiang

AU - Chen, Guo

AU - Chen, Jin

AU - Peng, Jinhui

AU - Ruan, Roger

AU - Srinivasakannan, C.

N1 - Funding Information: Financial supports from the National Natural Science Foundation of China (No: U1802255 ), the Key Projects in the National Science & Technology Pillar Program during the Twelfth Five-year Plan Period (No. 2015BAB17B00 ), the Hunan Provincial Science and Technology Plan Project, China (No. 2016TP1007 ), and Innovative Research Team (in Science and Technology) in University of Yunnan Province were sincerely acknowledged. Publisher Copyright: © 2019 Elsevier Ltd

PY - 2019/11

Y1 - 2019/11

N2 - Replacing fossil energy by utilizing biomass as carbon source to convert metal oxides has meaning for reduction of minerals. Microwave pyrolysis of walnut shell for reduction process of low-grade pyrolusite was proposed. Thermogravimetric analysis indicated biomass pyrolysis process for reduction of pyrolusite was divided into four phases identified by temperatures: dehydration stage (<150 °C), pre-pyrolysis stage (150 °C–290 °C), curing decomposition stage (290 °C–480 °C) and carbonization stage (>480 °C), and manganese recovery reached 92.01% at 650 °C for 30 min with 18% walnut shell. The strongest preferential orientation of MnO was appeared, with good crystalline structure and no MnO2 and FeO peaks detected. The product surface became loose and porous with numerous cracks, pits and holes, and molten granules were interconnected and stacked with regular shape. The methods propose new idea of selective reduction of pyrolusite based on biomass pyrolysis by microwave heating.

AB - Replacing fossil energy by utilizing biomass as carbon source to convert metal oxides has meaning for reduction of minerals. Microwave pyrolysis of walnut shell for reduction process of low-grade pyrolusite was proposed. Thermogravimetric analysis indicated biomass pyrolysis process for reduction of pyrolusite was divided into four phases identified by temperatures: dehydration stage (<150 °C), pre-pyrolysis stage (150 °C–290 °C), curing decomposition stage (290 °C–480 °C) and carbonization stage (>480 °C), and manganese recovery reached 92.01% at 650 °C for 30 min with 18% walnut shell. The strongest preferential orientation of MnO was appeared, with good crystalline structure and no MnO2 and FeO peaks detected. The product surface became loose and porous with numerous cracks, pits and holes, and molten granules were interconnected and stacked with regular shape. The methods propose new idea of selective reduction of pyrolusite based on biomass pyrolysis by microwave heating.

KW - Biomass pyrolysis

KW - Low-grade pyrolusite

KW - Microwave heating

KW - Phase transformation

KW - Structural

KW - Thermal behavior

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Microwave pyrolysis of walnut shell for reduction process of low-grade pyrolusite

Abstract

Bibliographical note

Keywords

UN SDGs

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