Pyrolysis and Gasification Experiments of Biomass under Elevated Pressure Condition
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概要
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This paper reports on the pyrolysis and CO2-gasification of various biomass materials in a pressurized thermobalance. In particular, the primary yields of total volatiles, tar and non-condensable gases, together with the composition of non-condensable gases, are measured as a function of temperature at 1 atm and 10.8 ata. The use of a high-intensity infrared heating source, in conjunction with a non-absorbing carrier gas (viz. argon), is reported to reduce the significance of secondary gas-phase pyrolysis reactions. Linear trends with atomic H/C ratio are observed in the tar yield, CH4 yield and total volatile yield during pyrolysis. The gasification kinetics of biomass chars (pyrolysed to 700°C at a medium heating rate) have also been measured by measuring the rate of weight loss during reaction with CO2, as a function of temperature. First-order kinetic rate constants are then determined by fitting the weight loss data using a random pore model. The results indicate that the gasification rate of biomass char increases as pressure increases.
著者
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Okazaki Ken
Department Of Energy Engineering Toyohashi University Of Technology
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OKUMURA Yukihiko
Maizuru National College of Technology, Dept. of Control Engineering
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