Comparison and characterization of property variation of microalgal biomass with non-oxidative and oxidative torrefaction

Congyu Zhang, Chengyu Wang, Guoliang Cao, Wei-Hsin Chen, Shih Hsin Ho

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Oxidative torrefaction is a noticeable technique for industrial-scale biochar production for fuel, soil amendment, and carbon storage due to its low technological and economic requirement. In this study, two microalgal biomass (Nannochloropsis Oceanica and Chlorella sp.) under the influences of different torrefaction parameters (i.e., temperature, duration, and carrier gas) are analyzed. To evaluate the variations of the properties of biochar from non-oxidative and oxidative torrefaction, specific surface area, contact angle, particle size distribution, and scanning electron microscope are measured and characterized. The results indicate that oxidative torrefaction shortens the torrefaction duration and possess higher energy efficiency, decarbonization, dehydrogenation, and deoxygenation when compared to non-oxidative torrefaction. Biochar produced from oxidative torrefaction has bigger surface area, better hydrophobicity, and palletization behavior, and thus obtained better fuel properties for combustion and industrial application. Nevertheless, the transportation property of biochar produced through oxidative torrefaction is not as good as that via non-oxidative torrefaction ones. For the two types of torrefaction, particle agglomeration, fragmentation, and pore-forming behaviors of the biochar are apparently observed.

Original languageEnglish
Pages (from-to)375-385
Number of pages11
JournalFuel
Volume246
DOIs
Publication statusPublished - 2019 Jun 15

Fingerprint

Biomass
Decarbonization
Dehydrogenation
Hydrophobicity
Specific surface area
Particle size analysis
Industrial applications
Contact angle
Energy efficiency
Electron microscopes
Agglomeration
Scanning
Soils
Economics
Carbon
Gases
Temperature
biochar

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

Cite this

Zhang, Congyu ; Wang, Chengyu ; Cao, Guoliang ; Chen, Wei-Hsin ; Ho, Shih Hsin. / Comparison and characterization of property variation of microalgal biomass with non-oxidative and oxidative torrefaction. In: Fuel. 2019 ; Vol. 246. pp. 375-385.
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abstract = "Oxidative torrefaction is a noticeable technique for industrial-scale biochar production for fuel, soil amendment, and carbon storage due to its low technological and economic requirement. In this study, two microalgal biomass (Nannochloropsis Oceanica and Chlorella sp.) under the influences of different torrefaction parameters (i.e., temperature, duration, and carrier gas) are analyzed. To evaluate the variations of the properties of biochar from non-oxidative and oxidative torrefaction, specific surface area, contact angle, particle size distribution, and scanning electron microscope are measured and characterized. The results indicate that oxidative torrefaction shortens the torrefaction duration and possess higher energy efficiency, decarbonization, dehydrogenation, and deoxygenation when compared to non-oxidative torrefaction. Biochar produced from oxidative torrefaction has bigger surface area, better hydrophobicity, and palletization behavior, and thus obtained better fuel properties for combustion and industrial application. Nevertheless, the transportation property of biochar produced through oxidative torrefaction is not as good as that via non-oxidative torrefaction ones. For the two types of torrefaction, particle agglomeration, fragmentation, and pore-forming behaviors of the biochar are apparently observed.",
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Comparison and characterization of property variation of microalgal biomass with non-oxidative and oxidative torrefaction. / Zhang, Congyu; Wang, Chengyu; Cao, Guoliang; Chen, Wei-Hsin; Ho, Shih Hsin.

In: Fuel, Vol. 246, 15.06.2019, p. 375-385.

Research output: Contribution to journalArticle

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AU - Ho, Shih Hsin

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