Wspólnotowy Serwis Informacyjny Badan i Rozwoju - CORDIS

High gradient high temperature measurements in a reacting packed bed

The achievement is measuring the gradient of temperature inside a reacting porous media exposed to high temperature (up to 1300K) during the operation of the plant which last one day. This material is a mix of ZnO and beech charcoal in neutral sealed atmosphere, whose height is shrinking due to the carboreduction of the material in gaseous Zn, CO and CO2 thanks to concentrated solar indirect heating.

A 650 mm ceramic lance made of 5 sheathed thermocouples of different height each protected by an alumina outer sheath was realised and operated for some of the operations of the Solzinc plant. Among its main characteristics is its resistance to the gaseous zinc inside the reactor and the high temperature.

The complete exploitation of the results is being conducted. The main purpose is to check the thermo-chemical dynamic model of the carboreduction inside the reactor.

This design can be used to determine temperature gradients in powder beds that can change of height in the time, leaving place to aggressive atmosphere.

The spatial resolution of the instrument can be modified by adding or removing sensing elements.

The operating temperature range can be modified by changing the sensing element type, allowing continuous measurements up to about 1800K.

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