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A Study on the Kinetics of Pyrolysis Reaction of Coffee Ground Residue and Biocrude-oil Production by Fast Pyrolysis

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한국폐기물자원순환학회지 (Journal of Korea Society of Waste Management)
한국폐기물자원순환학회 (Korea Society Of Waste Management)
초록

Converting biomass to biocrude oil has been extensively studied worldwide as a renewable energy technology and a solution to global warming caused by overuse of fossil fuels because it is a carbon neutral fuel that originates from biomass and, thus, could help prevent climate change. Fast pyrolysis is an effective technology for producing biocrude-oil, and woody biomass is usually used as feedstock. Although many studies have been performed with this feedstock, high production cost and low higher heating value (HHV) have frequently reported as challenging barriers to commercialization. Thus, coffee ground residue was selected as an alternative feedstock to overcome this barrier due to its higher HHV than other biomasses, as well as an expected improvement in the recycling rate of organic waste from many coffee shops. A kinetic study on the thermal decomposition reaction of ground coffee residue was carried out previously to investigate pyrolysis characteristics by thermogravimetric analysis, and its kinetic parameters were studied using two calculation models. A bubbling-fluidized-bed reactor was used for fast pyrolysis and the yield and characteristics of the biocrudeoil from ground coffee residue were investigated at reaction temperatures of 400-600°C. The activation energy of the decomposition reaction was calculated separately to be 41.57 kJ/mol and 44.01-350.20 kJ/mol with the above two methods. The highest biocrude-oil content was about 51.7wt% at 550°C.

저자
  • 한소영(한국기계연구원) | Soyoung Han (Environmental and Energy Systems Research Division, Korea Institute of Machinery & Materials)
  • 최연석(과학기술연합대학원대학교) | Yeon-Seok Choi (Department of Environment and Energy Mechanical Engineering, Korea University of Science and Technology) Corresponding author
  • 최상규(과학기술연합대학원대학교) | Sang-Kyu Choi (Department of Environment and Energy Mechanical Engineering, Korea University of Science and Technology)
  • 김석준(과학기술연합대학원대학교) | Seok-Joon Kim (Department of Environment and Energy Mechanical Engineering, Korea University of Science and Technology)
  • 정연우(한국기계연구원) | Yeon-Woo Jeong (Environmental and Energy Systems Research Division, Korea Institute of Machinery & Materials)