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Characteristics of Flame Stability and Gaseous Emission of Bio-Crude Oil from Coffee Ground in a Pilot-Scale Spray Burner

Author

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  • Sang Kyu Choi

    (Department of Clean Fuel & Power Generation, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea
    Environment & Energy Mechanical Engineering, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea)

  • Yeon Seok Choi

    (Department of Clean Fuel & Power Generation, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea
    Environment & Energy Mechanical Engineering, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea)

  • Yeon Woo Jeong

    (Department of Clean Fuel & Power Generation, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea)

  • So Young Han

    (Department of Clean Fuel & Power Generation, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea)

  • Quynh Van Nguyen

    (Environment & Energy Mechanical Engineering, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea)

Abstract

Coffee ground has been recently considered as a new biomass resource in relation to the increasing coffee consumption worldwide. The bio-crude oil can be produced by fast pyrolysis of coffee ground, and it has advantages of larger heating values in comparison with those from other biomass. But the bio-crude oil from coffee ground has a significantly high viscosity which can hinder the application to conventional burners. In this study, a pilot-scale burner system with a 35 kW capacity with an air-blast atomizing nozzle was developed for the combustion of bio-crude oil from coffee ground with a high viscosity. A downward fuel injection system was adopted to enhance the ignition of fuel spray and the flame stabilization, and a movable block swirl generator was installed for the combustion air. The bio-crude oil was blended with ethanol at the volumetric ratio of 9:1 to enhance the combustion characteristics. The effect of various atomizing air pressures, swirl intensities, and overall equivalence ratios on the flame stability and gaseous emission were investigated to find out the optimum operating conditions for a bio-crude oil burner.

Suggested Citation

  • Sang Kyu Choi & Yeon Seok Choi & Yeon Woo Jeong & So Young Han & Quynh Van Nguyen, 2020. "Characteristics of Flame Stability and Gaseous Emission of Bio-Crude Oil from Coffee Ground in a Pilot-Scale Spray Burner," Energies, MDPI, vol. 13(11), pages 1-12, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:11:p:2882-:d:367519
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    References listed on IDEAS

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    1. Stamatov, V. & Honnery, D. & Soria, J., 2006. "Combustion properties of slow pyrolysis bio-oil produced from indigenous Australian species," Renewable Energy, Elsevier, vol. 31(13), pages 2108-2121.
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    3. Bok, Jin Pil & Choi, Hang Seok & Choi, Yeon Seok & Park, Hoon Chae & Kim, Seock Joon, 2012. "Fast pyrolysis of coffee grounds: Characteristics of product yields and biocrude oil quality," Energy, Elsevier, vol. 47(1), pages 17-24.
    4. Choi, Sang Kyu & Choi, Yeon Seok & Kim, Seock Joon & Jeong, Yeon Woo, 2016. "Characteristics of flame stability and gaseous emission of biocrude-oil/ethanol blends in a pilot-scale spray burner," Renewable Energy, Elsevier, vol. 91(C), pages 516-523.
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    Cited by:

    1. José A. Parra Rodríguez & Marco A. Abad Romero & Oliver M. Huerta Chávez & Luis R. Rangel-López & José C. Jiménez-Escalona & Jorge Diaz Salgado, 2023. "Coherent Structures Analysis of Methanol and Hydrogen Flames Using the Scale-Adaptive Simulation Model," Energies, MDPI, vol. 16(20), pages 1-21, October.
    2. Enas Taha Sayed & Abdul Ghani Olabi & Abdul Hai Alami & Ali Radwan & Ayman Mdallal & Ahmed Rezk & Mohammad Ali Abdelkareem, 2023. "Renewable Energy and Energy Storage Systems," Energies, MDPI, vol. 16(3), pages 1-26, February.

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