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Steam plays a vital role in the gasification process. This study aims to investigate the changes in char structure and reactivity during the gasification of Victorian brown coal. A Loy Yang brown coal sample was gasified at 800°C in a novel fluidised-bed/fixed-bed reactor in three different gasification atmospheres: 15% H 2 O balanced with argon, 4000ppm O 2 balanced with CO 2...
Volatile-char interactions are an important consideration in the design and operation of a gasifier. This study aims to investigate the effects of volatile-char interactions on the in situ char–steam reactivity at 800°C and the ex-situ char–O 2 reactivity at 400°C. A Victorian brown coal was gasified in 15% steam at 800°C in a one-stage novel fluidised-bed/fixed-bed quartz reactor, in which...
The structural features and combustion reactivity of chars prepared from the fast pyrolysis of mallee wood were investigated using Raman spectroscopy and thermogravimetric analysis. The Raman spectra were curve-fitted by using 10 Gaussian bands, representing different structural features of chars. The total Raman peak areas between 800 and 1800cm −1 and combustion reactivity of chars were...
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