Abstract

In this study, the gasification performance of the pine tree sawdust and hornbeam sawdust at varied air flow rate and microwave plasma power are investigated. In each case, 250g sawdust are dosed to gasification reactor. The effects of power and air flow rate on syngas composition and reactor temperature are studied. The sawdust contents are examined by ultimate and proximate analysis. The heating value of the fuels are measured as 21353 kJ/kg for hornbeam sawdust and 17942 kJ/kg for pine tree sawdust by bomb calorimeter. The syngas content is substantially proportional with the content of the fuel. The variation of local temperatures during the gasification is of great importance on the process. The temperature is increased by increasing the power and the conversion performance of sawdust is enhanced. Air flow rate has a reverse effect on both magnitude of the temperate and syngas yield. The temperature in gasifier increase %54 in case of 50 sL/min and approximately %80 in case of 100sL/min by increasing power from 3 kW to 6 kW. CO, CH4 and H2 conversion increase by increasing the power while CO2 conversion decreases by power. Unlike to the effect of power, increase of air flow rate from 50 to 100 sL/min enhances CO2 conversion, with a reduction in the conversions of CO, CH4 and H2.

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