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Preparation and Experimental Study of Mixed Carbonates With High Maximum Using Temperature

[+] Author Affiliations
Nan Ren, Yu-ting Wu, Chong-fang Ma

Beijing University of Technology, Beijing, China

Paper No. ES2012-91401, pp. 545-550; 6 pages
doi:10.1115/ES2012-91401
From:
  • ASME 2012 6th International Conference on Energy Sustainability collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2012 6th International Conference on Energy Sustainability, Parts A and B
  • San Diego, California, USA, July 23–26, 2012
  • Conference Sponsors: Advanced Energy Systems Division, Solar Energy Division
  • ISBN: 978-0-7918-4481-6
  • Copyright © 2012 by ASME

abstract

In order to meet the demands of future high-temperature solar thermal power generation, 37 kinds of mixed carbonate molten salts were prepared by mixing potassium carbonate, lithium carbonate, sodium carbonate in accordance with different proportions in this paper. Melting point of molten salt, as the most important basic character, is the primary parameter to select molten salt. Melting point and decomposition temperature are measured by Simultaneous Thermal Analyzer. The results show that melting points of major ternary carbonates are close at around 400°C and decomposition temperatures of most ternary carbonate are between 800 and 850°C. In accordance with energy variation, when the system is cooled from the molten state, precipitates of crystalline phases is orderly. Crystallization temperatures of some samples are much higher than their melting points. Therefore, through comparative experimental study of heating and cooling, 10 kinds of mixed carbonates with low melting point and crystallization temperature were selected primarily. Then, latent heat, density and thermal stability of these mixed salts were studied.

Copyright © 2012 by ASME
Topics: Temperature

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