Journal
ENERGY
Volume 238, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2021.121944
Keywords
Waste plastics; Fluidized bed; Air gasification; Equivalence ratio; Tar
Categories
Funding
- Research and Development Program of the Korea Institute of Energy Research (KIER) [C1-2430]
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [NRF-2020R1A5A1019631]
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The study investigated the air gasification properties of SRF with high content of residual mixed waste plastic in a lab scale bubbling fluidized bed gasifier. The results showed that gas yield increases and tar yield decreases as the operating temperature and air-to-fuel equivalence ratio (ER) increases, with changes in the concentration of various gases in the gas product. The H2/CO ratio increases with rising temperature and decreases with rising ER, while carbon conversion efficiency (CCE) and cold gas efficiency peak at 800 degrees C and ER of 0.25.
This study investigates air gasification properties of SRF with high content of residual mixed waste plastic in a 1 kg/h lab scale bubbling fluidized bed gasifier. Gasifier internal diameter is 0.114 m and its height is 1 m. Silica sand particles with a mean diameter of 400 mm is used as the bed material. During the gasification experiments the effect of bed temperature is determined in the range of 600-900 degrees C and the effect of air-to-fuel equivalence ratio (ER) is investigated in the range of 0.15-0.30. Gas analysis is conducted using a non-dispersive infrared analyzer and gas chromatograph. As the operating temperature and ER increases, the gas yield increases, and tar yield decreases. The yield of CO, CH4, H-2, and C2H2 in the gas product increases with temperature, whereas those of CO2, C-2-C-3 hydrocarbons decreases. The increase in ER decreases the concentrations of CO, CH4, H-2, and C-2-C-3 hydrocarbons and increases the CO2 in the gas product. H-2/CO ratio substantially increases with rising temperature and decreases with rising ER. Carbon conversion efficiency (CCE) and cold gas efficiency reach peak at 800 degrees C and ER of 0.25. (C) 2021 Elsevier Ltd. All rights reserved.
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