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Characteristics of Aerosol Formation and Emissions During Corn Stalk Pyrolysis

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  • Ning Li

    (School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255049, China
    Shandong Research Center of Engineering and Technology for Clean Energy, Zibo 255049, China)

  • Jiale Zhang

    (School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255049, China
    Shandong Research Center of Engineering and Technology for Clean Energy, Zibo 255049, China)

  • Zhihe Li

    (School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255049, China
    Shandong Research Center of Engineering and Technology for Clean Energy, Zibo 255049, China)

  • Yongjun Li

    (School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255049, China
    Shandong Research Center of Engineering and Technology for Clean Energy, Zibo 255049, China)

Abstract

The inevitable emission of aerosols during pyrolysis can negatively affect the downstream process and even pollute the environment. In this work, the characteristics of aerosols were investigated during corn stalk pyrolysis at 400–900 °C. The effects of other operation conditions on the aerosol emissions were also probed with online and offline instruments. Results show the yield of aerosol presents a regular change with temperature in a wide range ratio of 3.4–8.7 wt.%. The aerosol size distribution reveals a unimodal form mainly in the 1.1–2.1 μm accumulation range and the maximum emission achieved is about 35 mg/g for SR and SP at 500 °C. Nevertheless, SL gives about 34 mg/g at 600 °C. High temperature promotes the decomposition of polymers into partciles with small diameter (less than PM 1.0 ). The microtopography of aerosol presents spherical droplets, elongated-like liquid and solid particles that form heterogenous or homogeneous aggregations, that also happen on account of collisions. Aerosols contain mostly organic matter, a small amount of salt and over 50% of volatile organic carbon molecules (VOCs) in the total organic carbon (OC). Proper gas flow, high vapor concentration and longer path way boost the yield of bio-oil and reduce the emission of aerosols. The direct contact is beneficial for adequate extraction, but also causes additional solvent emissions.

Suggested Citation

  • Ning Li & Jiale Zhang & Zhihe Li & Yongjun Li, 2020. "Characteristics of Aerosol Formation and Emissions During Corn Stalk Pyrolysis," Energies, MDPI, vol. 13(22), pages 1-15, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:22:p:5924-:d:444654
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    References listed on IDEAS

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    1. Kan, Tao & Strezov, Vladimir & Evans, Tim J., 2016. "Lignocellulosic biomass pyrolysis: A review of product properties and effects of pyrolysis parameters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 57(C), pages 1126-1140.
    2. Zhang, Yufeng & Xie, Xingyun & Zhao, Jing & Wei, Xiaolin, 2020. "The alkali metal occurrence characteristics and its release and conversion during wheat straw pyrolysis," Renewable Energy, Elsevier, vol. 151(C), pages 255-262.
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    Cited by:

    1. Hongpeng Guo & Shuang Xu & Xiaotong Wang & Wen Shu & Jia Chen & Chulin Pan & Cheng Guo, 2021. "Driving Mechanism of Farmers’ Utilization Behaviors of Straw Resources—An Empirical Study in Jilin Province, the Main Grain Producing Region in the Northeast Part of China," Sustainability, MDPI, vol. 13(5), pages 1-16, February.
    2. Šnajdárek, Ladislav & Chýlek, Radomír & Pospíšil, Jiří, 2022. "Slow thermal decomposition of lignocelluloses compared to numerical model: Fine particle emission, gaseous products analysis," Energy, Elsevier, vol. 261(PB).

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    Keywords

    cornstalk; pyrolysis; aerosol;
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