Thermogravimetric and kinetic analysis of thermal decomposition characteristics of low-lipid microalgae

Chao Gai; Yuanhui Zhang; Wan Ting Chen; Peng Zhang; Yuping Dong

doi:10.1016/j.biortech.2013.09.137

Thermogravimetric and kinetic analysis of thermal decomposition characteristics of low-lipid microalgae

Chao Gai, Yuanhui Zhang, Wan Ting Chen, Peng Zhang, Yuping Dong

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

Abstract

The thermal decomposition behavior of two microalgae, Chlorella pyrenoidosa (CP) and Spirulina platensis (SP), were investigated on a thermogravimetric analyzer under non-isothermal conditions. Iso-conversional Vyazovkin approach was used to calculate the kinetic parameters, and the universal integral method was applied to evaluate the most probable mechanisms for thermal degradation of the two feedstocks. The differential equations deduced from the models were compared with experimental data. For the range of conversion fraction investigated (20-80%), the thermal decomposition process of CP could be described by the reaction order model (F3), which can be calculated by the integral equation of G(α)=[(1-α)^-2-1]/2. And the apparent activation energy was in the range of 58.85-114.5kJ/mol. As for SP, it can be described by the reaction order model (F2), which can be calculated by the integral equation of G(α)=(1-α)^-1-1, and the range of apparent activation energy was 74.35-140.1kJ/mol.

Original language	English (US)
Pages (from-to)	139-148
Number of pages	10
Journal	Bioresource Technology
Volume	150
DOIs	https://doi.org/10.1016/j.biortech.2013.09.137
State	Published - Dec 2013

Keywords

Apparent activation energy
Chlorella
Kinetic
Spirulina
Thermogravimetric

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Waste Management and Disposal

Online availability

10.1016/j.biortech.2013.09.137

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title = "Thermogravimetric and kinetic analysis of thermal decomposition characteristics of low-lipid microalgae",

abstract = "The thermal decomposition behavior of two microalgae, Chlorella pyrenoidosa (CP) and Spirulina platensis (SP), were investigated on a thermogravimetric analyzer under non-isothermal conditions. Iso-conversional Vyazovkin approach was used to calculate the kinetic parameters, and the universal integral method was applied to evaluate the most probable mechanisms for thermal degradation of the two feedstocks. The differential equations deduced from the models were compared with experimental data. For the range of conversion fraction investigated (20-80%), the thermal decomposition process of CP could be described by the reaction order model (F3), which can be calculated by the integral equation of G(α)=[(1-α)-2-1]/2. And the apparent activation energy was in the range of 58.85-114.5kJ/mol. As for SP, it can be described by the reaction order model (F2), which can be calculated by the integral equation of G(α)=(1-α)-1-1, and the range of apparent activation energy was 74.35-140.1kJ/mol.",

keywords = "Apparent activation energy, Chlorella, Kinetic, Spirulina, Thermogravimetric",

author = "Chao Gai and Yuanhui Zhang and Chen, {Wan Ting} and Peng Zhang and Yuping Dong",

note = "Funding Information: Authors gratefully acknowledge the China Scholarship Council for a financial support to the first author. The Department of Agricultural and Biological Engineering at University of Illinois at Urbana-Champaign provided the experiment facilities and expenses for the research. Authors also thank the fellow graduate students and researchers in the Bioenvironmental Engineering Division at University of Illinois at Urbana-Champaign for their kind assistance during the project. ",

year = "2013",

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doi = "10.1016/j.biortech.2013.09.137",

language = "English (US)",

volume = "150",

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journal = "Bioresource Technology",

issn = "0960-8524",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Thermogravimetric and kinetic analysis of thermal decomposition characteristics of low-lipid microalgae

AU - Gai, Chao

AU - Zhang, Yuanhui

AU - Chen, Wan Ting

AU - Zhang, Peng

AU - Dong, Yuping

N1 - Funding Information: Authors gratefully acknowledge the China Scholarship Council for a financial support to the first author. The Department of Agricultural and Biological Engineering at University of Illinois at Urbana-Champaign provided the experiment facilities and expenses for the research. Authors also thank the fellow graduate students and researchers in the Bioenvironmental Engineering Division at University of Illinois at Urbana-Champaign for their kind assistance during the project.

PY - 2013/12

Y1 - 2013/12

N2 - The thermal decomposition behavior of two microalgae, Chlorella pyrenoidosa (CP) and Spirulina platensis (SP), were investigated on a thermogravimetric analyzer under non-isothermal conditions. Iso-conversional Vyazovkin approach was used to calculate the kinetic parameters, and the universal integral method was applied to evaluate the most probable mechanisms for thermal degradation of the two feedstocks. The differential equations deduced from the models were compared with experimental data. For the range of conversion fraction investigated (20-80%), the thermal decomposition process of CP could be described by the reaction order model (F3), which can be calculated by the integral equation of G(α)=[(1-α)-2-1]/2. And the apparent activation energy was in the range of 58.85-114.5kJ/mol. As for SP, it can be described by the reaction order model (F2), which can be calculated by the integral equation of G(α)=(1-α)-1-1, and the range of apparent activation energy was 74.35-140.1kJ/mol.

AB - The thermal decomposition behavior of two microalgae, Chlorella pyrenoidosa (CP) and Spirulina platensis (SP), were investigated on a thermogravimetric analyzer under non-isothermal conditions. Iso-conversional Vyazovkin approach was used to calculate the kinetic parameters, and the universal integral method was applied to evaluate the most probable mechanisms for thermal degradation of the two feedstocks. The differential equations deduced from the models were compared with experimental data. For the range of conversion fraction investigated (20-80%), the thermal decomposition process of CP could be described by the reaction order model (F3), which can be calculated by the integral equation of G(α)=[(1-α)-2-1]/2. And the apparent activation energy was in the range of 58.85-114.5kJ/mol. As for SP, it can be described by the reaction order model (F2), which can be calculated by the integral equation of G(α)=(1-α)-1-1, and the range of apparent activation energy was 74.35-140.1kJ/mol.

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KW - Kinetic

KW - Spirulina

KW - Thermogravimetric

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Thermogravimetric and kinetic analysis of thermal decomposition characteristics of low-lipid microalgae

Abstract

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