Gasification experimental procedure

Effect of Sample Containment and Gas Flow Rate. Two series of experiments established that, with the experimental procedures and conditions studied, gasification was controlled by chemical kinetics and not gas access. For experimental convenience the samples were contained within a silica crucible. To ensure that this would not impede gas movement either to or from the oxidising surface, the oxidation behaviour of a contained sample was compared with that of a sample freely suspended within the environment. At the highest temperature (1056°C), there was no significant difference over 70% bum off between either the kinetics or rates of oxidation of the samples in water vapour (pj O 58 mm Hg). 

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