Fluidized-Bed Gasification of Plastic Waste, Wood, and Their Blends with Coal

Energies

Lucio Zaccariello¹  Maria Laura Mastellone² 

[1] Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Second University of Naples, Via Antonio Vivaldi 43, Caserta 81100, Italy; E-Mail

关键词: fluidized bed gasifier;    co-gasification;    plastic waste;    wood;    coal;    mass and energy balances;   

DOI  :  10.3390/en8088052

来源: mdpi

【 摘 要 】

The effect of fuel composition on gasification process performance was investigated by performing mass and energy balances on a pre-pilot scale bubbling fluidized bed reactor fed with mixtures of plastic waste, wood, and coal. The fuels containing plastic waste produced less H₂, CO, and CO₂ and more light hydrocarbons than the fuels including biomass. The lower heating value (LHV) progressively increased from 5.1 to 7.9 MJ/Nm³ when the plastic waste fraction was moved from 0% to 100%. Higher carbonaceous fines production was associated with the fuel containing a large fraction of coal (60%), producing 87.5 g/kg_Fuel compared to only 1.0 g/kg_Fuel obtained during the gasification test with just plastic waste. Conversely, plastic waste gasification produced the highest tar yield, 161.9 g/kg_Fuel, while woody biomass generated only 13.4 g/kg_Fuel. Wood gasification showed a carbon conversion efficiency (CCE) of 0.93, while the tests with two fuels containing coal showed lowest CCE values (0.78 and 0.70, respectively). Plastic waste and wood gasification presented similar cold gas efficiency (CGE) values (0.75 and 0.76, respectively), while that obtained during the co-gasification tests varied from 0.53 to 0.73.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.