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Technical Brief

Experimental Investigation Into the Characteristics of Chars Obtained From Fast Pyrolysis of Different Biomass Fuels

[+] Author and Article Information
Xiaoyan Gao, Bingxi Li, Wenke Zhao

School of Energy Science and Engineering,
Harbin Institute of Technology,
Harbin 150001, China

Yaning Zhang

School of Energy Science and Engineering,
Harbin Institute of Technology,
Harbin 150001, China;
Department of Bioproducts and Biosystems Engineering,
University of Minnesota,
St. Paul, MN 55108
e-mail: ynzhang@hit.edu.cn

Gongnan Xie

School of Marine Science and Technology,
Northwestern Polytechnical University,
Xi'an 710072, China
e-mail: ConanASME@gmail.com

1Corresponding authors.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received June 20, 2017; final manuscript received March 13, 2018; published online March 29, 2018. Assoc. Editor: Oronzio Manca.

J. Energy Resour. Technol 140(4), 044501 (Mar 29, 2018) (5 pages) Paper No: JERT-17-1301; doi: 10.1115/1.4039603 History: Received June 20, 2017; Revised March 13, 2018

Biomass is a promising alternative energy source for fossil fuel with the advantages of abundance, renewability, environmental friendliness, etc. This makes the development of biomass technology be of great potential and interesting. The experiments of biomass fast pyrolysis were performed in a microquartz reactor for rice husk (RH), corn stalk (CS) and birch wood (BW), and scanning electron microscope (SEM), energy dispersive spectrometer, and Raman microscope were then applied to analyze the collected chars. The average char yields of RH, CS, and BW pyrolyzed at 800 °C were 29.64%, 18.67%, and 8.64%, respectively. The morphological structures of RH and CS were mainly reserved in chars, while the raw surface textures of BW disappeared during the fast pyrolysis. The silicon concentrations in RH char and CS char were much higher than BW char, and the graphitization degree of CS char was the lowest among the three biomass chars.

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Figures

Grahic Jump Location
Fig. 1

Biomass materials: (a) RH, (b) CS, and (c) BW

Grahic Jump Location
Fig. 2

Schematic diagram of pyrolysis system

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Fig. 3

Char yields from different biomass fuels

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Fig. 4

SEM photograph of different bio-chars: (a) RH char, (b) CS char, and (c) BW char

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Fig. 5

Compositions of different bio-chars

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Fig. 6

Raman spectra of different bio-chars

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