Abstract
The experimental determination of reaction rate of solids like wood or coal involving change of weight when they are submitted to high temperature and pressure environment is necessary to achieve optimal design and better understanding and modelling of the processes. The aim of the paper is to present the general set up of a new thermobalance apparatus. Some of the salient features of the device are:
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pressure up to 8MPa.
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temperature up to 1300K.
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heating rates up to 100K/min.
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flow rates up to 20 cm/s. (NTP)
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sample weight up to 10g.
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temperature of the sample bed continuously followed.
In this apparatus the entire reactor, the gas lines and the thermocouples attached, are weighed during a run. The advantages of such a procedure are:
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the reactant gas flow traverses the sample bed: there is no by passing around the sample. The fluid flow regime and the external mass transfer process can be controlled.
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as a consequence, chemical analysis of the product gases can be related to the chemical process taking place in the bed. Results are given for gasification rates of char obtained from tropical wood in different atmospheres.
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Richard, J.R., Rouan, J.P. (1988). New Apparatus for the Study of the Gasification of Char in High Temperature and Pressure Environments. In: Bridgwater, A.V., Kuester, J.L. (eds) Research in Thermochemical Biomass Conversion. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2737-7_28
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DOI: https://doi.org/10.1007/978-94-009-2737-7_28
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