Renewable woody biomass is promising for the production of fuel and chemicals by pyrolysis and gasification. Especially, current thermal processing techniques tend to generate products with a large slate of compounds such as gaseous products, bio-oil and bio-char. In Korea, pine trees and oak trees occupy over 50% in forest. To understand decomposition characteristics, thermogravimetirc analysis of pinus rigida and oriental oak were investigated using TGA. These samples were gasified in a fluidized bed reactor, and the effects of reaction temperature, residence time, and catalyst species on gas yields and selectivities were investigated over a temperature range of 800 to 900?. With increasing the gasification temperature from 800 to 900 ?, the gas yield of pinus rigida maintained 75.15~78.41%, whereas the gas yield of oriental oak decreased from 71.05 to 58.15%. The gaseous products consisted of mostly CO, CO2, H2 and a small fraction of C1-C4 hydrocarbons. The effect of catalyst species on the product yields was studied after gasification at 860 ? of pinus rigida and oriental oak, respectively. It is interesting to notice that using dolomite catalysts showed different behavior on product yields of pinus rigida and oriental oak samples: lower gas yield in pinus rigida and higher gas yield in oriental oak. When pinus rigida was gasified over dolomite, Co/dolomite and Ni/dolomite catalysts at 860?, the H2/CO ratios were 1.34, 1.53, and 1.57, respectively, and those values for oak tree sample were 1.02, 0.84, and 0.88, respectively.

Gasification of pine and oak trees with a dolomite in a fluidized bed reactor

242nd National Meeting (2011)

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