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Published April 29, 2017 | Version 1
Project deliverable Open

Report on assessment of an experimental apparatus for HSM/HTF thermal stability investigation

  • 1. ENEA

Description

This report presents the results of the experimental tests of the thermal decomposition of the HITEC XL mixture, the tests were performed in a small tubular reactor for five different temperatures data in the range 375-515°C. Molten nitrate salts composition is 15% NaNO3 – 42% KNO3 – 43% Ca(NO3)2 by weight, the tubular reactor is equipped with impellers, it can contains about 1.5 kg of molten salts and there are also the mass flow controllers to measure the air flow in the inlet and outlet. Moreover there is a pressure gauge and there are also several thermocouples for the temperature measurement . On the outlet stream was measured the concentrations of oxygen and nitrogen by using chromatography.
The object of the present study is to validate the experimental setup by isothermal lab-scale tests performing also a qualitative analysis, regarding the thermal decomposition of the mixture. The results provide qualitative information about the early stage of the thermal decomposition, but it’s no possible to predict long term performance of the molten mixture. This mixture was selected to test the experimental facility, because it is one of the most commonly employed transfer and storage fluid, and its chemical stability was already investigated (see references).

Files

SFERA-II_D15.3_Assessment experimental apparatus for HSM-HTF thermal stability.pdf

Additional details

Funding

SFERA-II – Solar Facilities for the European Research Area-Second Phase 312643
European Commission