DIFFERENTIAL ENTROPY OF ADSORPTION In Ca5Na3 SEOLITE

Authors

  • Juraeva Z. Assistant of the Department of Biomedical Engineering, Informatics and Biophysics, Tashkent Medical Academy. Author
  • Bazarbayev M. Head of the Department of Biomedical Engineering, Informatics and Biophysics, Tashkent Medical Academy, Candidate of Physical and Mathematical Sciences, Associate Professor Author
  • Mamadaliev U. Independent Researcher, Namangan Engineering-Technological Institute Author

Keywords:

zeolite, adsorption, entropy, isotherm, temperature, microcalorimeter, ammonia.

Abstract

For the first time the main energy characteristics of ammonia adsorption in zeolite Ca5Na3A (MSS-624) were determined by adsorption-microcalorimetric method, differential values of free energy and entropy of adsorption were calculated, as well as the correlation between adsorption-energy characteristics and crystallochemical structure of adsorbent was found and the detailed molecular mechanism of formation of ion-molecular clusters of ammonia with cations in zeolite in the whole region of filling of nano-structured pore space of adsorbent was revealed. The stepwise character of the entropy of ammonia adsorption is revealed. The extended low entropy region correlates with the number of sodium and calcium cations in the zeolite structure. The average molar integral entropy of ammonia adsorption on zeolite Ca5Na3A (MSS-624) was found to be -61 J/mol K and indicates that in the zeolite the mobility of ammonia molecules is lower than the liquid phase and close to the mobility of the solid phase, leading to a strong inhibition of the mobility of adsorption on ammonia cations.

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Published

2025-03-01

Issue

2025: ICDE -TURKEY -FEB

Section

Articles

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

DIFFERENTIAL ENTROPY OF ADSORPTION In Ca5Na3 SEOLITE. (2025). Innovate Conferences, 35-40. https://innovateconferences.org/index.php/ic/article/view/28

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