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- W189502641 abstract "Stump biomass is energy rich and stump harvesting for use as fuel become more and moreinteresting in Sweden. Swedish Forest Agency (2009) has estimated that stump harvesting inSweden would respond to an annual energy supply of 57 TWh/year. However, stump has notbeen recognized as a bioenergy resource in Sweden. Suitable methods for pre-treatment ofstump are probably of great importance to make it accepted as fuel. It is therefore rewardingto carry out an investigation in this area for stump.This report represents results from a diploma project, which was aimed to develop a fixed bedreactor for experimental study of biomass torrefaction, followed by TG analysis and kineticmodelling employing Ozawa method and different kinetic models including one-step andthree-pseudo-component models. The focus was on Norway spruce stump. Two other types ofbiomass, poplar and fuel tree chips were also included in the study for comparison.The study has demonstrated that fuel properties, including heating values and grindability ofthe investigated biomasses, were improved by torrefaction. The heating rate affects thethermal decomposition process. In addition, SEM analysis indicated that the wood surfacestructure was broken and destroyed by torrefaction process. Activation energy of untreatedand torrefied biomass were determined, being in good agreement with data in the literature.Among the kinetic models tested, three-pseudo-components model with reaction order n ≠ 1appears to be the best for simulating pyrolysis of untreated and torrefied biomass." @default.
- W189502641 created "2016-06-24" @default.
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- W189502641 date "2011-09-12" @default.
- W189502641 modified "2023-09-22" @default.
- W189502641 title "Torrefaction of biomass" @default.
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